06 - Strings in Java/004 String Formatting_en.srt

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Hello, Tim.

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In this lesson, I'd like to show you how you can format your string a bit later in this training course.

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We'll write with you your own web application, and you will have standard labels to ensure amazing

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user experience in your web application.

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For example, you will have personalized welcome message which will contain user first name and greetings.

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Greetings will be different based on the current time of the day.

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Your template string can look like this.

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Hello dear, some name and good part of the day.

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During the string formatting, you will be able to insert different strings instead of percent sign

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s.

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Here you have morning, afternoon and evening strings.

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To format string, you need to call string format method where the first argument will be string you

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want to format, and after that you will pass arguments referenced by the format specifiers like these

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signs.

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In our template we have two format specifiers in case you will pass more than two arguments after the

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template, they will be ignored in case you will pass not enough arguments.

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Exception will be thrown by JVM during the runtime format.

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Method returns the reference to the new string object and we can print it to console.

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Hello dear Andre.

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Good morning.

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Also you can print formatted string directly to console.

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You can use printf method for such purpose.

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Here you see different format specifier percent sign.

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D.

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This specifier is used to put any digit instead of it.

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And here you can see that I am passing integer.

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In console you can see the result which I get.

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There are different specifiers and flags and I prepared examples for you.

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You can find source code in separate file formatted demo.

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I will share a link with you to this file in the lesson resources or in video description.

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Here you will be able to find link to the official Oracle documentation where all specifiers and flags

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are listed.

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Let me run this program to walk you through the program output.

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The examples describe different ways to format numbers, justification, hexadecimal numbers, formatting,

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precision formatting, etc. I don't think that it is necessary to pay attention to each example here

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in this video, because from the syntax point of view, they are all similar.

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The only thing you need to learn is different specifiers and when to use them.

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During your homework, I would ask you to run these examples on your computer and to ask me questions

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in case you will have any.

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Thanks a lot for your attention.

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See you in the next lesson.