Question

give a simple example of "call by reference" in java

Answer 1

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Call by Value and Call by Reference in Java

There is only call by value in java, not call by reference. If we call a method passing a value, it is known as call by value. The changes being done in the called method, is not affected in the calling method.

Example of call by value in java

In case of call by value original value is not changed. Let's take a simple example

     

public static void main(String args[]){  

  Operation op=new Operation();  

 

 

}  

}  

download this example

Output:before change 50

      after change 50    

 

Another Example of call by value in java

In case of call by reference original value is changed if we made changes in the called method. If we pass object in place of any primitive value, original value will be changed. In this example we are passing object as a value. Let's take a simple example:

 

Answer 2

This is an example of call by reference