Java 给出类Fish、Lake的声明,具有UML图中的成员变量和成员方法。

发布网友发布时间：2023-08-03 15:08

共1个回答

热心网友时间：2024-11-09 04:42

代码如下：

class Fish {

private int weight;

public Fish(int weight) {
this.weight = weight;
}

// 增加体重
public void increaseWeight(int weight) {
this.weight += weight;
}

public int getWeight() {
return this.weight;
}
}

class Lake {

private Fish fish;

public void setFish(Fish fish) {
this.fish = fish;
}

public void feedFish(int val) {
this.fish.increaseWeight(val);
}
}

public class Test {

public static void main(String[] args) {

Fish blackFish = new Fish(1);

Lake taiLake = new Lake();
taiLake.setFish(blackFish);

taiLake.feedFish(20);
System.out.println("鱼重：" + blackFish.getWeight());

taiLake.feedFish(20);
System.out.println("鱼重：" + blackFish.getWeight());
}
}

追问

这个是运行不了嘛