克隆对象的一种简单方法是实现复制构造函数。
public class Sheep {
private String name;
private int weight;
public Sheep(String name, int weight) {
this.name= name;
this.weight= weight;
}
// 复制构造函数
// 将另一个的字段复制到新对象中
public Sheep(Sheep other) {
this.name= other.name;
this.weight= other.weight;
}
}
// 创造一只羊
Sheep sheep = new Sheep("Dolly", 20);
// 克隆羊
Sheep dolly = new Sheep(sheep); //dolly.nameis "Dolly" anddolly.weightis 20