class Class1 implements Interface1 {...}

Week 7: Enum, Generic Type, Streams, write to file, class diagram/16. Implement a Class Hierarchy

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+The class hierarchy is defined in the UML diagram below.
+
+Implement the classes as per the diagram. 
+The functionality of the methods is not tested; definitions are important.
+
+However, the code must compile.
+https://ville.utu.fi/static_resources/jubery_utufi/calculator_calculatorMachine_UML.png
+
+
+
+<interface>
+Calculator
++getResult(): double
+
+
+^
+-
+|
+|
+|
+|
+|
+
+
+CalculatorMachine
+-result: double
+
++CalculatorMachine (result: double)
++calculate(operation: String, parameter: double): void
++getResult(); double
+
+
+====================================================
+
+import java.util.Random;
+import java.lang.reflect.Field;
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+    }
+}
+
+
+
+//ADD
+interface Calculator {
+  public double getResult();
+}
+
+
+//ADD
+class CalculatorMachine implements Calculator {
+  private double result;
+
+  public CalculatorMachine(double result) {
+      this.result = result;
+  }
+  
+  public void calculate(String operation, double parameter) {
+      // turn String operation into math operation
+      if (operation == "+") {
+          this.result = this.result + parameter;
+      } 
+      else if (operation == "-") {
+          this.result = this.result - parameter;
+      } 
+      else if (operation == "*") {
+          this.result = this.result * parameter;
+      } 
+      else if (operation == "/") {
+          this.result = this.result / parameter;
+      }
+      else if (operation == "%") {
+          this.result = this.result % parameter;
+      }
+  }
+  
+  @Override
+  public double getResult() {
+      return this.result;
+  }
+
+    
+}
+
+
+
+    
+
+Testing the class CalculatorMachine...
+Constructor found, CalculatorMachine object created!
+Class implements the Calculator interface!
+
+Checking attributes...
+Attribute result found!
+Attribute type: double
+Attribute private: true
+
+Checking methods....
+getResult defined in the Calculator interface!
+getResult works!
+calculate works!
+
+
+