how to copy an object in java

To create a copy of an object in Java, you can use the clone method of the Object class.

The clone method is a protected method of the Object class that creates a new object that is a copy of the original object. To use the clone method, you must override it in the class of the object you want to copy and make it public. You can then call the clone method on an instance of the object to create a copy of the object.

Here is an example of how you can override the clone method and use it to create a copy of an object in Java:

public class MyObject implements Cloneable {
  private int value;

  public MyObject(int value) {
    this.value = value;
  }

  public int getValue() {
    return value;
  }

  public void setValue(int value) {
    this.value = value;
  }

  @Override
  public MyObject clone() throws CloneNotSupportedException {
    return (MyObject) super.clone();
  }
}

MyObject obj1 = new MyObject(5);
MyObject obj2 = obj1.clone();

This code defines a class called MyObject that implements the Cloneable interface. The Cloneable interface is a marker interface that indicates that an object is eligible to be cloned. The MyObject class overrides the clone method of the Object class and makes it public.

The clone method of the Object class creates a new object and copies the values of the fields of the original object to the new object. The clone method returns the new object as an Object, so you will need to cast it to the appropriate type. In this example, the clone method returns the new object as a MyObject.

To create a copy of an object, you can call the clone method on an instance of the object. In this example, obj1 is an instance of MyObject class.
We use clone method to create another instance obj2.