Returning the Object From Method in Java

Returning the Object From Method

In Java Programming A method can return any type of data, including class types that you create.
For example, in the following program, the getBoxObject( ) method returns an object.

Example : Returning the Object From Method

import java.io.IOException;

class Box {
      int length;
      int width;

      Rectangle(int l,int w) {
        length = l;
        width = w;
      }

      Rectangle getBoxObject() {
        Box box = new Box(10,20);
        return box;
      }
}

class ReturnBoxObject {
      public static void main(String args[]) {
        Box ob1 = new Box(40,50);
        Box ob2;

        ob2 = ob1.getBoxObject();
        System.out.println("ob1.length : " + ob1.length);
        System.out.println("ob1.width: " + ob1.width);

        System.out.println("ob2.length : " + ob2.length);
        System.out.println("ob2.width: " + ob2.width);

        }
}

Output of the Program :

ob1.length : 40
ob1.width: 50
ob2.length : 10
ob2.width: 20

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Explanation :

1. In the above program we have called a method getBoxObject() and the method creates object of class from which it has been called.
2. All objects are dynamically allocated using new, you don’t need to worry about an object going out-of-scope because the method in which it was created terminates.
3. The object will continue to exist as long as there is a reference to it somewhere in your program. When there are no references to it, the object will be reclaimed the next time garbage collection takes place.