一、所需要的类
一个实现克隆接口的类
二、实现代码
实现克隆接口的类代码
java
class SimplePrototype implements Cloneable {
private String name;
private int value;
public SimplePrototype(String name, int value) {
this.name = name;
this.value = value;
}
@Override
public SimplePrototype clone() {
try {
return (SimplePrototype) super.clone();
} catch (CloneNotSupportedException e) {
throw new AssertionError(); // 不会发生
}
}
public void setName(String name) {
this.name = name;
}
public void setValue(int value) {
this.value = value;
}
@Override
public String toString() {
return "SimplePrototype{name='" + name + "', value=" + value + "}";
}
}
调用类
java
public class SimplePrototypeDemo {
public static void main(String[] args) {
SimplePrototype original = new SimplePrototype("Original", 100);
SimplePrototype copy = original.clone();
System.out.println("Original: " + original);
System.out.println("Copy: " + copy);
copy.setName("Copy");
copy.setValue(200);
System.out.println("\nAfter modification:");
System.out.println("Original: " + original);
System.out.println("Copy: " + copy);
}
}
三、结论
原型模式的作用就是降低在创建 对象时的成本,因为创建一个对象可能会传很多参数。