How do I copy objects in Java?

How do I copy objects in Java?

In Java, you can copy objects using the clone method or by using a copy constructor. Would you like to see examples?

Yes, please show me an example using the clone method.

Sure! Here's a simple example:

class MyClass implements Cloneable {
    int value;

    MyClass(int value) {
        this.value = value;
    }

    @Override
    protected Object clone() throws CloneNotSupportedException {
        return super.clone();
    }
}

public class Main {
    public static void main(String[] args) throws CloneNotSupportedException {
        MyClass original = new MyClass(10);
        MyClass copy = (MyClass) original.clone();
        System.out.println(copy.value); // Outputs 10
    }
}

This will create a copy of the original object.

What about using a copy constructor?

A copy constructor is another way to copy objects. Here's an example:

class MyClass {
    int value;

    MyClass(int value) {
        this.value = value;
    }

    // Copy constructor
    MyClass(MyClass other) {
        this.value = other.value;
    }
}

public class Main {
    public static void main(String[] args) {
        MyClass original = new MyClass(10);
        MyClass copy = new MyClass(original);
        System.out.println(copy.value); // Outputs 10
    }
}

This creates a new object with the same value as the original.