7.3 代理

package com.snails.chapter7.three;
/**
 * @author Snails
 * @date 2021/5/7 22:01
 */
public class SpaceShip extends SpaceShipControls {
    private String name;
    public SpaceShip(String name){
        this.name = name;
    }
    @Override
    public String toString() {
        return name;
    }
}

package com.snails.chapter7.three;
/**
 * @author Snails
 * @date 2021/5/7 22:00
 */
public class SpaceShipControls {
    void up(int velocity){}
}

package com.snails.chapter7.three;
/**
 * @author Snails
 * @date 2021/5/7 21:59
 */
public class SpaceShipDelegation {
    private String name;
    private SpaceShipControls controls = new SpaceShipControls();
    public SpaceShipDelegation(String name){
        this.name = name;
    }
    public void up(int velocity){
        controls.up(velocity);
    }
    public static void main(String[] args) {
        SpaceShipDelegation nsea = new SpaceShipDelegation("NSEA");
        nsea.up(100);
    }
}