[Java] Call by value

Call by value

- There is only call by value in java, not call by reference

1. Example

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public class Test{           int data = 50;           void change(int data){         data = data + 100;     }           public static void main(String[]args){                   Test obj = new Test();         System.out.println(obj.data);         obj.change(50);         System.out.println(obj.data);     } }

50

50

- The value of data is not changed

2. Another Example

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package statics;   public class Test{           int data = 50;           void change(Test a){         data = data + 100;     }           public static void main(String[]args){                   Test obj = new Test();         System.out.println(obj.data);         obj.change(obj);         System.out.println(obj.data);     } }

 

- If we pass object in place of any primitive value, original value will be changed

- This case we are passing object as a value