Java--对象组合（画）

 Main主类创建“红色”屋顶“白色”墙的房子、10米高的“银杏”树、20米长的“石头”桥、面积200平方米深3米的湖；创建一个画对象，通过构造方法把房子、树、 桥、湖组合进画中；调用show方法进行显示。

输入格式:

无需输入。

输出格式:

与样例一致。

输入样例:

输出样例:

这幅画中有：红色的屋顶，白色的墙10米高的银杏树20米长的石头桥200平方米的湖有3米深

 代码实现:

class House{    private String roof;    private String wall;    public House(String roof,String wall){ this.roof=roof; this.wall=wall;    }    public String getRoof() { return roof;    }    public String getWall() { return wall;    }}class Tree{    private int height;    private String type;    public Tree(int height,String type){ this.height=height; this.type=type;    }    public int getHeight() { return height;    }    public String getType() { return type;    }}class Bridge{    private int length;    private String stuff;    public Bridge(int length,String stuff){ this.length=length; this.stuff=stuff;    }    public int getLength() { return length;    }    public String getStuff() { return stuff;    }}class Lake{    private int area;    private int depth;    public Lake(int area,int depth){ this.area=area; this.depth=depth;    }    public int getArea() { return area;    }    public int getDepth() { return depth;    }}class Picture{    private House house;    private Tree tree;    private Bridge bridge;    private Lake lake;    public Picture(House house, Tree tree, Bridge bridge, Lake lake) { this.house = house; this.tree = tree; this.bridge = bridge; this.lake = lake;    }    public void show(){ System.out.println("这幅画中有："); System.out.println(house.getRoof()+"的屋顶，"+house.getWall()+"的墙"); System.out.println(tree.getHeight()+"米高的"+tree.getType()); System.out.println(bridge.getLength()+"米长的"+bridge.getStuff()+"桥"); System.out.println(lake.getArea()+"平方米的湖有"+ lake.getDepth()+"米深");    }}public class Main{    public static void main(String[] args) { House house = new House("红色","白色"); Tree tree = new Tree(10,"银杏树"); Bridge bridge = new Bridge(20,"石头"); Lake lake = new Lake(200,3); Picture picture = new Picture(house,tree,bridge,lake); picture.show();    }}

#看类图写程序的题不需要太多思考 主要是考验对写代码的熟练度