通過實現 Clonable 介面進行克隆

通過實現 Cloneable 介面克隆物件。

public class Sheep implements Cloneable {

    private String name;

    private int weight;

    public Sheep(String name, int weight) {
        this.name = name;
        this.weight = weight;
    }

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

}

// create a sheep
Sheep sheep = new Sheep("Dolly", 20);
// clone the sheep
Sheep dolly =  (Sheep) sheep.clone(); // dolly.name is "Dolly" and dolly.weight is 20