Question stringlengths 1 113 | Answer stringlengths 22 6.98k |
|---|---|
How to create a string object? | There are two ways to create String object:
1.By string literal
2.By new keyword |
What is String Literal? | Java String literal is created by using double quotes. For Example:
String s="welcome";
Each time you create a string literal, the JVM checks the "string constant pool" first. If the string already exists in the pool, a reference to the pooled instance is returned. If the string doesn't exist in the pool, a new stri... |
By new keyword | String s=new String("Welcome");//creates two objects and one reference variable
In such case, JVM will create a new string object in normal (non-pool) heap memory, and the literal "Welcome" will be placed in the string constant pool. The variable s will refer to the object in a heap (non-pool). |
Can you provide Java String Example? | public class StringExample{
public static void main(String args[]){
String s1="java";//creating string by Java string literal
char ch[]={'s','t','r','i','n','g','s'};
String s2=new String(ch);//converting char array to string
String s3=new String("example");//creating Java string by new keyword... |
Java String class methods | The java.lang.String class provides many useful methods to perform operations on sequence of char values.
char charAt(int index) - It returns char value for the particular index
int length() - It returns string length
static String format(String format, Object... args) - It returns a formatted string.
static St... |
What is Immutable String in Java? | A String is an unavoidable type of variable while writing any application program. String references are used to store various attributes like username, password, etc. In Java, String objects are immutable. Immutable simply means unmodifiable or unchangeable.
Once String object is created its data or state can't be ch... |
Testimmutablestring.java | class Testimmutablestring{
public static void main(String args[]){
String s="Sachin";
s.concat(" Tendulkar");//concat() method appends the string at the end
System.out.println(s);//will print Sachin because strings are immutable objects
}
}
Output:
Sachin
|
Why String objects are immutable in Java? | As Java uses the concept of String literal. Suppose there are 5 reference variables, all refer to one object "Sachin". If one reference variable changes the value of the object, it will be affected by all the reference variables. That is why String objects are immutable in Java.
Following are some features of String... |
Why String class is Final in Java? | The reason behind the String class being final is because no one can override the methods of the String class. So that it can provide the same features to the new String objects as well as to the old ones. |
What is Java String compare? | We can compare String in Java on the basis of content and reference.
It is used in authentication (by equals() method), sorting (by compareTo() method), reference matching (by == operator) etc.
There are three ways to compare String in Java:
1.By Using equals() Method
2.By Using == Operator
3.By compareTo() ... |
How to use Java string compares By Using equals() Method? | The String class equals() method compares the original content of the string. It compares values of string for equality. String class provides the following two methods:
-public boolean equals(Object another) compares this string to the specified object.
-public boolean equalsIgnoreCase(String another) compares this... |
How to use By Using compareTo() method? | The String class compareTo() method compares values lexicographically and returns an integer value that describes if first string is less than, equal to or greater than second string.
Suppose s1 and s2 are two String objects. If:
-s1 == s2 : The method returns 0.
-s1 > s2 : The method returns a positive value.
... |
What is String Concatenation in Java? | In Java, String concatenation forms a new String that is the combination of multiple strings. There are two ways to concatenate strings in Java:
1.By + (String concatenation) operator
2.By concat() method |
Can you provide String Concatenation by + (String concatenation) operator? | Java String concatenation operator (+) is used to add strings. For Example:
TestStringConcatenation1.java
class TestStringConcatenation1{
public static void main(String args[]){
String s="Sachin"+" Tendulkar";
System.out.println(s);//Sachin Tendulkar
}
}
Output:
Sachin Tendulkar |
How to concatenate string by concat() method? | The String concat() method concatenates the specified string to the end of current string. Syntax:
public String concat(String another)
Let's see the example of String concat() method.
TestStringConcatenation3.java
class TestStringConcatenation3{
public static void main(String args[]){
String s1="... |
Can you provide String concatenation example using StringBuilder class? | StringBuilder is class provides append() method to perform concatenation operation. The append() method accepts arguments of different types like Objects, StringBuilder, int, char, CharSequence, boolean, float, double. StringBuilder is the most popular and fastet way to concatenate strings in Java. It is mutable class ... |
Can you provide String concatenation using format() method? | String.format() method allows to concatenate multiple strings using format specifier like %s followed by the string values or objects.
StrFormat.java
public class StrFormat
{
/* Driver Code */
public static void main(String args[])
{
String s1 = new String("Hello"); //String ... |
Can you provide an example of String concatenation using String.join() method (Java Version 8+)? | The String.join() method is available in Java version 8 and all the above versions. String.join() method accepts arguments first a separator and an array of String objects.
StrJoin.java:
public class StrJoin
{
/* Driver Code */
public static void main(String args[])
{
String s1 = ... |
Can you provide an example of String concatenation using StringJoiner class (Java Version 8+)? | StringJoiner class has all the functionalities of String.join() method. In advance its constructor can also accept optional arguments, prefix and suffix.
StrJoiner.java
public class StrJoiner
{
/* Driver Code */
public static void main(String args[])
{
StringJoiner s = new StringJ... |
Can you provide an example of String concatenation using Collectors.joining() method (Java (Java Version 8+)? | The Collectors class in Java 8 offers joining() method that concatenates the input elements in a similar order as they occur.
ColJoining.java
import java.util.*;
import java.util.stream.Collectors;
public class ColJoining
{
/* Driver Code */
public static void main(String args[])
{ ... |
What is Substring in Java? | A part of String is called substring. In other words, substring is a subset of another String. Java String class provides the built-in substring() method that extract a substring from the given string by using the index values passed as an argument. In case of substring() method startIndex is inclusive and endIndex is ... |
Can you provide Example of Java substring() method? | TestSubstring.java
public class TestSubstring{
public static void main(String args[]){
String s="SachinTendulkar";
System.out.println("Original String: " + s);
System.out.println("Substring starting from index 6: " +s.substring(6));//Tendulkar
System.out.println("Substring starting from ind... |
Can you provide an example of using String.split() method? | The split() method of String class can be used to extract a substring from a sentence. It accepts arguments in the form of a regular expression.
TestSubstring2.java
import java.util.*;
public class TestSubstring2
{
/* Driver Code */
public static void main(String args[])
{
... |
What are Java String Class Methods? | The java.lang.String class provides a lot of built-in methods that are used to manipulate string in Java. By the help of these methods, we can perform operations on String objects such as trimming, concatenating, converting, comparing, replacing strings etc.
Java String is a powerful concept because everything is ... |
Can you provide example of Java String toUpperCase() and toLowerCase() method? | The Java String toUpperCase() method converts this String into uppercase letter and String toLowerCase() method into lowercase letter.
Stringoperation1.java
public class Stringoperation1
{
public static void main(String ar[])
{
String s="Sachin";
System.out.println(s.toUpperCase());//SACHIN
... |
Can you provide example of Java String trim() method? | The String class trim() method eliminates white spaces before and after the String
.
Stringoperation2.java
public class Stringoperation2
{
public static void main(String ar[])
{
String s=" Sachin ";
System.out.println(s);// Sachin
System.out.println(s.trim());//Sachin
}
}
Outp... |
Can you provide an example of Java String startsWith() and endsWith() method? | The method startsWith() checks whether the String starts with the letters passed as arguments and endsWith() method checks whether the String ends with the letters passed as arguments.
Stringoperation3.java
public class Stringoperation3
{
public static void main(String ar[])
{
String s="Sachin";
S... |
Can you provide an example of Java String charAt() Method? | The String class charAt() method returns a character at specified index.
Stringoperation4.java
public class Stringoperation4
{
public static void main(String ar[])
{
String s="Sachin";
System.out.println(s.charAt(0));//S
System.out.println(s.charAt(3));//h
}
}
Output:
S
h
|
Can you provide an example of Java String length() Method? | The String class length() method returns length of the specified String.
Stringoperation5.java
public class Stringoperation5
{
public static void main(String ar[])
{
String s="Sachin";
System.out.println(s.length());//6
}
}
Output:
6
|
Can you provide an example of Java String intern() Method? | A pool of strings, initially empty, is maintained privately by the class String.
When the intern method is invoked, if the pool already contains a String equal to this String object as determined by the equals(Object) method, then the String from the pool is returned. Otherwise, this String object is added to the pool... |
Can you provide an example of Java String valueOf() Method? | The String class valueOf() method coverts given type such as int, long, float, double, boolean, char and char array into String.
Stringoperation7.java
public class Stringoperation7
{
public static void main(String ar[])
{
int a=10;
String s=String.valueOf(a);
System.out.println(s+10);
} ... |
Can you provide an example of Java String replace() Method? | The String class replace() method replaces all occurrence of first sequence of character with second sequence of character.
Stringoperation8.java
public class Stringoperation8
{
public static void main(String ar[])
{
String s1="Java is a programming language. Java is a platform. Java is an Island."; ... |
What is Java StringBuffer Class? | Java StringBuffer class is used to create mutable (modifiable) String objects. The StringBuffer class in Java is the same as String class except it is mutable i.e. it can be changed.
Note: Java StringBuffer class is thread-safe i.e. multiple threads cannot access it simultaneously. So it is safe and will result in a... |
What is Important Constructors of StringBuffer Class? | Important Constructors of StringBuffer Class
Constructor: StringBuffer()
Description: It creates an empty String buffer with the initial capacity of 16.
Constructor: StringBuffer(String str)
Description: It creates a String buffer with the specified string.
Constructor: StringBuffer(int capacity)
Descript... |
What are the Important methods of StringBuffer class? | Important methods of StringBuffer class
Modifier and Type: public synchronized StringBuffer
Method: append(String s)
Description: It is used to append the specified string with this string. The append() method is overloaded like append(char), append(boolean), append(int), append(float), append(double) etc.
Modifi... |
What is a mutable String? | A String that can be modified or changed is known as mutable String. StringBuffer and StringBuilder classes are used for creating mutable strings.
|
Can you provide an example of StringBuffer Class append() Method? | The append() method concatenates the given argument with this String.
StringBufferExample.java
class StringBufferExample{
public static void main(String args[]){
StringBuffer sb=new StringBuffer("Hello ");
sb.append("Java");//now original string is changed
System.out.println(sb);//prints Hello Java
}... |
Can you provide an example of StringBuffer insert() Method? | The insert() method inserts the given String with this string at the given position.
StringBufferExample2.java
class StringBufferExample2{
public static void main(String args[]){
StringBuffer sb=new StringBuffer("Hello ");
sb.insert(1,"Java");//now original string is changed
System.out.println(sb);//pri... |
Can you provide an example of StringBuffer replace() Method? | The replace() method replaces the given String from the specified beginIndex and endIndex.
StringBufferExample3.java
class StringBufferExample3{
public static void main(String args[]){
StringBuffer sb=new StringBuffer("Hello");
sb.replace(1,3,"Java");
System.out.println(sb);//prints HJavalo
}
}
... |
Can you provide an example of StringBuffer delete() Method? | The delete() method of the StringBuffer class deletes the String from the specified beginIndex to endIndex.
StringBufferExample4.java
class StringBufferExample4{
public static void main(String args[]){
StringBuffer sb=new StringBuffer("Hello");
sb.delete(1,3);
System.out.println(sb);//prints Hlo
}
... |
Can you provide an example of StringBuffer reverse() Method? | The reverse() method of the StringBuilder class reverses the current String.
StringBufferExample5.java
class StringBufferExample5{
public static void main(String args[]){
StringBuffer sb=new StringBuffer("Hello");
sb.reverse();
System.out.println(sb);//prints olleH
}
}
Output:
olleH
|
Can you provide an example of StringBuffer capacity() Method? | The capacity() method of the StringBuffer class returns the current capacity of the buffer. The default capacity of the buffer is 16. If the number of character increases from its current capacity, it increases the capacity by (oldcapacity*2)+2. For example if your current capacity is 16, it will be (16*2)+2=34.
Str... |
Can you provide an example of StringBuffer ensureCapacity() method? | The ensureCapacity() method of the StringBuffer class ensures that the given capacity is the minimum to the current capacity. If it is greater than the current capacity, it increases the capacity by (oldcapacity*2)+2. For example if your current capacity is 16, it will be (16*2)+2=34.
StringBufferExample7.java
clas... |
What is Java StringBuilder Class? | Java StringBuilder class is used to create mutable (modifiable) String. The Java StringBuilder class is same as StringBuffer class except that it is non-synchronized. It is available since JDK 1.5.
|
What are Important Constructors of StringBuilder class? | Constructor:
StringBuilder()
Description: It creates an empty String Builder with the initial capacity of 16.
StringBuilder(String str)
Description: It creates a String Builder with the specified string.
StringBuilder(int length)
Description: It creates an empty String Builder with the specified capacity... |
What are the Important methods of StringBuilder class? | Method
public StringBuilder append(String s)
Description: It is used to append the specified string with this string. The append() method is overloaded like append(char), append(boolean), append(int), append(float), append(double) etc.
public StringBuilder insert(int offset, String s)
Description: It is used to inse... |
Can you provide an example of Java StringBuilder Examples? | Let's see the examples of different methods of StringBuilder class.
1) StringBuilder append() method
The StringBuilder append() method concatenates the given argument with this String.
StringBuilderExample.java
class StringBuilderExample{
public static void main(String args[]){
StringBuilder sb=new String... |
What are the Difference of String between StringBuffer? | There are many differences between String and StringBuffer. A list of differences between String and StringBuffer are given below:
1) The String class is immutable while the StringBuffer class is mutable.
2) String is slow and consumes more memory when we concatenate too many strings because every time it creates ... |
Can you provide an example of Performance Test of String and StringBuffer? | ConcatTest.java
public class ConcatTest{
public static String concatWithString() {
String t = "Java";
for (int i=0; i<10000; i++){
t = t + "Tpoint";
}
return t;
}
public static String concatWithStringBuffer(){
StringBuffer ... |
Can you providean example of String and StringBuffer HashCode Test? | As we can see in the program given below, String returns new hashcode while performing concatenation but the StringBuffer class returns same hashcode.
InstanceTest.java
public class InstanceTest{
public static void main(String args[]){
System.out.println("Hashcode test of String:");
Str... |
What are the Difference between StringBuffer and StringBuilder? | Java provides three classes to represent a sequence of characters: String, StringBuffer, and StringBuilder. The String class is an immutable class whereas StringBuffer and StringBuilder classes are mutable. There are many differences between StringBuffer and StringBuilder. The StringBuilder class is introduced since JD... |
Can you provide StringBuffer Example? | BufferTest.java
//Java Program to demonstrate the use of StringBuffer class.
public class BufferTest{
public static void main(String[] args){
StringBuffer buffer=new StringBuffer("hello");
buffer.append("java");
System.out.println(buffer);
}
}
Output:
hellojav... |
Can you provide StringBuilder Example? | BuilderTest.java
//Java Program to demonstrate the use of StringBuilder class.
public class BuilderTest{
public static void main(String[] args){
StringBuilder builder=new StringBuilder("hello");
builder.append("java");
System.out.println(builder);
}
}
Output:
... |
Can you provide Performance Test of StringBuffer and StringBuilder? | Let's see the code to check the performance of StringBuffer and StringBuilder classes.
ConcatTest.java
//Java Program to demonstrate the performance of StringBuffer and StringBuilder classes.
public class ConcatTest{
public static void main(String[] args){
long startTime = System.currentTimeMil... |
How to create Immutable class? | There are many immutable classes like String, Boolean, Byte, Short, Integer, Long, Float, Double etc. In short, all the wrapper classes and String class is immutable. We can also create immutable class by creating final class that have final data members
|
Can you provide Example to create Immutable class? | In this example, we have created a final class named Employee. It have one final datamember, a parameterized constructor and getter method.
ImmutableDemo.java
public final class Employee
{
final String pancardNumber;
public Employee(String pancardNumber)
{
this.pancardNumber=pancardNumber;
}
publ... |
What is Java toString() Method? | If you want to represent any object as a string, toString() method comes into existence.
The toString() method returns the String representation of the object.
If you print any object, Java compiler internally invokes the toString() method on the object. So overriding the toString() method, returns the desired ou... |
What is the Advantage of Java toString() method? | By overriding the toString() method of the Object class, we can return values of the object, so we don't need to write much code.
|
Can you provide an example of Understanding problem without toString() method? | Let's see the simple code that prints reference.
Student.java
class Student{
int rollno;
String name;
String city;
Student(int rollno, String name, String city){
this.rollno=rollno;
this.name=name;
this.city=city;
}
public static void main(String args[]){
Student s1... |
Can you provide an Example of Java toString() method? | Let's see an example of toString() method.
Student.java
class Student{
int rollno;
String name;
String city;
Student(int rollno, String name, String city){
this.rollno=rollno;
this.name=name;
this.city=city;
}
public String toString(){//overriding the toString() method ... |
What is StringTokenizer in Java? | The java.util.StringTokenizer class allows you to break a String into tokens. It is simple way to break a String. It is a legacy class of Java.
It doesn't provide the facility to differentiate numbers, quoted strings, identifiers etc. like StreamTokenizer class. We will discuss about the StreamTokenizer class in I/O... |
What are the Constructors of the StringTokenizer Class? | There are 3 constructors defined in the StringTokenizer class.
Constructor
StringTokenizer(String str)
Description: It creates StringTokenizer with specified string.
StringTokenizer(String str, String delim)
Description: It creates StringTokenizer with specified string and delimiter.
StringTokenizer(Strin... |
What are the Methods of the StringTokenizer Class? | The six useful methods of the StringTokenizer class are as follows:
boolean hasMoreTokens()
Description: It checks if there is more tokens available.
String nextToken()
Description: It returns the next token from the StringTokenizer object.
String nextToken(String delim)
Description: It returns the next tok... |
Can you provide an Example of StringTokenizer Class? | Let's see an example of the StringTokenizer class that tokenizes a string "my name is khan" on the basis of whitespace.
Simple.java
import java.util.StringTokenizer;
public class Simple{
public static void main(String args[]){
StringTokenizer st = new StringTokenizer("my name is khan"," ");
whi... |
Can you provide an Example of nextToken(String delim) method of the StringTokenizer class? | Test.java
import java.util.*;
public class Test {
public static void main(String[] args) {
StringTokenizer st = new StringTokenizer("my,name,is,khan");
// printing next token
System.out.println("Next token is : " + st.nextToken(","));
}
}
Output:
Ne... |
Can you provide an Example of hasMoreTokens() method of the StringTokenizer class? | This method returns true if more tokens are available in the tokenizer String otherwise returns false.
StringTokenizer1.java
import java.util.StringTokenizer;
public class StringTokenizer1
{
/* Driver Code */
public static void main(String args[])
{
/* StringTokenizer object */
S... |
Can you provide an Example of hasMoreElements() method of the StringTokenizer class? | This method returns the same value as hasMoreTokens() method of StringTokenizer class. The only difference is this class can implement the Enumeration interface.
StringTokenizer2.java
import java.util.StringTokenizer;
public class StringTokenizer2
{
public static void main(String args[])
{
StringT... |
Could you provide an Example of nextElement() method of the StringTokenizer class? | nextElement() returns the next token object in the tokenizer String. It can implement Enumeration interface.
StringTokenizer3.java
import java.util.StringTokenizer;
public class StringTokenizer3
{
/* Driver Code */
public static void main(String args[])
{
/* StringTokenizer object */ ... |
Could you provide an Example of countTokens() method of the StringTokenizer class? | This method calculates the number of tokens present in the tokenizer String.
StringTokenizer4.java
import java.util.StringTokenizer;
public class StringTokenizer3
{
/* Driver Code */
public static void main(String args[])
{
/* StringTokenizer object */
StringTokenizer st = new St... |
How many objects will be created in the following code? | String s1="javatpoint";
String s2="javatpoint";
Answer: Only one.
|
What is the difference between equals() method and == operator? | The equals() method matches content of the strings whereas == operator matches object or reference of the strings.
|
What is Java String charAt()? |
The Java String class charAt() method returns a char value at the given index number.
The index number starts from 0 and goes to n-1, where n is the length of the string. It returns StringIndexOutOfBoundsException, if the given index number is greater than or equal to this string length or a negative number.
Syn... |
Can you provide an example of Java String charAt() Method? | Let's see Java program related to string in which we will use charAt() method that perform some operation on the give string.
FileName: CharAtExample.java
public class CharAtExample{
public static void main(String args[]){
String name="javatpoint";
char ch=name.charAt(4);//returns the char value at the 4th index ... |
Can you provide an example of Accessing First and Last Character by Using the charAt() Method? | Let's see a simple example where we are accessing first and last character from the provided string.
FileName: CharAtExample3.java
public class CharAtExample3 {
public static void main(String[] args) {
String str = "Welcome to Javatpoint portal";
int strLength = str.length();
// ... |
Can you provide an example of Print Characters Presented at Odd Positions by Using the charAt() Method? | Let's see an example where we are accessing all the elements present at odd index.
FileName: CharAtExample4.java
public class CharAtExample4 {
public static void main(String[] args) {
String str = "Welcome to Javatpoint portal";
for (int i=0; i<=str.length()-1; i++) {
... |
Could you provide an example ofCounting Frequency of a character in a String by Using the charAt() Method? | Let's see an example in which we are counting frequency of a character in the given string.
FileName: CharAtExample5.java
public class CharAtExample5 {
public static void main(String[] args) {
String str = "Welcome to Javatpoint portal";
int count = 0;
for (int i=0; i<=str.le... |
Could you provide an example of Counting the Number of Vowels in a String by Using the chatAt() Method? | Let's see an example where we are counting the number of vowels present in a string with the help of the charAt() method.
FileName: CharAtExample6.java
// import statement
import java.util.*;
public class CharAtExample6
{
ArrayList<Character> al;
// constructor for creating and
// assig... |
What is Java String compareTo()? | The Java String class compareTo() method compares the given string with the current string lexicographically. It returns a positive number, negative number, or 0.
It compares strings on the basis of the Unicode value of each character in the strings.
If the first string is lexicographically greater than the secon... |
Could you provide Java String compareTo() Method Example? | FileName: CompareToExample.java
public class CompareToExample{
public static void main(String args[]){
String s1="hello";
String s2="hello";
String s3="meklo";
String s4="hemlo";
String s5="flag";
System.out.println(s1.compareTo(s2));//0 because both are equal
System.out.println(s1.compareTo(... |
Can you provide an example of Java String compareTo(): empty string? | When we compare two strings in which either first or second string is empty, the method returns the length of the string. So, there may be two scenarios:
-If first string is an empty string, the method returns a negative
-If second string is an empty string, the method returns a positive number that is the length of t... |
Could you provide an example of Java String compareTo(): case sensitive? | To check whether the compareTo() method considers the case sensitiveness of characters or not, we will make the comparison between two strings that contain the same letters in the same sequence.
Suppose, a string having letters in uppercase, and the second string having the letters in lowercase. On comparing these t... |
Could you provide an example of Java String compareTo(): ClassCastException? | The ClassCastException is thrown when objects of incompatible types get compared. In the following example, we are comparing an object of the ArrayList (al) with a string literal ("Sehwag").
FileName: CompareToExample4.java
// import statement
import java.util.*;
class Players
{
private St... |
Could you provide an example of Java String compareTo(): NullPointerException? | The NullPointerException is thrown when a null object invokes the compareTo() method. Observe the following example.
FileName: CompareToExample5.java
public class CompareToExample5
{
// main method
public static void main(String[] args)
{
String str = null;
// null is invoking the compar... |
What is Java String concat? | The Java String class concat() method combines specified string at the end of this string. It returns a combined string. It is like appending another string.
Signature
The signature of the string concat() method is given below:
public String concat(String anotherString)
Parameter
anotherString : another st... |
Could you provide an example of Java String concat() method example? | FileName: ConcatExample.java
public class ConcatExample{
public static void main(String args[]){
String s1="java string";
// The string s1 does not get changed, even though it is invoking the method
// concat(), as it is immutable. Therefore, the explicit assignment is required here.
s1.conc... |
What is Java String contains()? | The Java String class contains() method searches the sequence of characters in this string. It returns true if the sequence of char values is found in this string otherwise returns false.
Signature
The signature of string contains() method is given below:
public boolean contains(CharSequence sequence)
Parameter... |
can you provide an example of Java String contains() Method Example? | FileName: ContainsExample.java
class ContainsExample{
public static void main(String args[]){
String name="what do you know about me";
System.out.println(name.contains("do you know"));
System.out.println(name.contains("about"));
System.out.println(name.contains("hello"));
}}
Output:
true
tru... |
What are the Limitations of the Contains() method? | Following are some limitations of the contains() method:
-The contains() method should not be used to search for a character in a string. Doing so results in an error.
-The contains() method only checks for the presence or absence of a string in another string. It never reveals at which index the searched index is ... |
What is the Java String endsWith()? | The Java String class endsWith() method checks if this string ends with a given suffix. It returns true if this string ends with the given suffix; else returns false.
Signature
The syntax or signature of endsWith() method is given below.
public boolean endsWith(String suffix)
Parameter
suffix : Sequence of ... |
Could you provide an example of Java String endsWith() Method Example? | FileName: EndsWithExample.java
public class EndsWithExample{
public static void main(String args[]){
String s1="java by javatpoint";
System.out.println(s1.endsWith("t"));
System.out.println(s1.endsWith("point"));
}}
Output:
true
true
|
What is Java String equals()? | The Java String class equals() method compares the two given strings based on the content of the string. If any character is not matched, it returns false. If all characters are matched, it returns true.
The String equals() method overrides the equals() method of the Object class.
Signature
publicboolean equals(... |
Could you provide an example of Java String equals() Method? | FileName: EqualsExample.java
public class EqualsExample{
public static void main(String args[]){
String s1="javatpoint";
String s2="javatpoint";
String s3="JAVATPOINT";
String s4="python";
System.out.println(s1.equals(s2));//true because content and case is same
System.out.println(s1.equals(s3))... |
What is Java String equalsIgnoreCase()? | The Java String class equalsIgnoreCase() method compares the two given strings on the basis of the content of the string irrespective of the case (lower and upper) of the string. It is just like the equals() method but doesn't check the case sensitivity. If any character is not matched, it returns false, else returns t... |
Could you provide an example of Java String equalsIgnoreCase() Method? | FileName: EqualsIgnoreCaseExample.java
public class EqualsIgnoreCaseExample{
public static void main(String args[]){
String s1="javatpoint";
String s2="javatpoint";
String s3="JAVATPOINT";
String s4="python";
System.out.println(s1.equalsIgnoreCase(s2));//true because content and case both are same
System... |
What is Java String format()? | The java string format() method returns the formatted string by given locale, format and arguments.
If you don't specify the locale in String.format() method, it uses default locale by calling Locale.getDefault() method.
The format() method of java language is like sprintf() function in c language and printf() me... |
Could you provide an example of Java String format() method? | public class FormatExample{
public static void main(String args[]){
String name="sonoo";
String sf1=String.format("name is %s",name);
String sf2=String.format("value is %f",32.33434);
String sf3=String.format("value is %32.12f",32.33434);//returns 12 char fractional part filling with 0
System.out.... |
What is Java String Format Specifiers? | Here, we are providing a table of format specifiers supported by the Java String.
Format Specifier: %a
Data Type: floating point (except BigDecimal)
Output: Returns Hex output of floating point number.
Format Specifier: %b
Data Type: Any type
Output: "true" if non-null, "false" if null
Format Specifier: %... |
What is Java String getBytes()? | The Java String class getBytes() method does the encoding of string into the sequence of bytes and keeps it in an array of bytes.
Signature
There are three variants of getBytes() method. The signature or syntax of string getBytes() method is given below:
public byte[] getBytes()
public byte[] getBytes(Charset c... |
Can you provide an example of String class getBytes() Method? | The parameterless getBytes() method encodes the string using the default charset of the platform, which is UTF - 8. The following two examples show the same.
FileName: StringGetBytesExample.java
public class StringGetBytesExample{
public static void main(String args[]){
String s1="ABCDEFG";
byte[] barr=s1.... |
What is Java String getChars()? | The Java String class getChars() method copies the content of this string into a specified char array. There are four arguments passed in the getChars() method. The signature of the getChars() method is given below:
Signature
public void getChars(int srcBeginIndex, int srcEndIndex, char[] destination, int dstBeginI... |
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