前言

选修了《软件设计模式》，下面是建造者模式的作业，设计模式参考的是《软件设计模式》（刘伟 著）。画UML类图的工具是Visual Paradigm，还不是特别熟练..

作业描述

作业

UML类图

UML类图

效果

Car

Java源代码

import java.awt.*;
import javax.swing.*;

public class BuilderPattern {
    public class Circle{
        int x,y,width,height;
        public Circle(int x,int y,int width,int height){
            super();
            this.x=x;
            this.y=y;
            this.width=width;
            this.height=height;
        }
        public int getX(){
            return x;
        }
        public int getY(){
            return y;
        }
        public int getWidth(){
            return width;
        }
        public int getHeight(){
            return height;
        }
        public void setX(int x){
            this.x=x;
        }
        public void setY(int y){
            this.y=y;
        }
        public void setWidth(int width){
            this.width=width;
        }
        public void setHeight(int height){
            this.height=height;
        }
    }
    public class Rect{
        int x,y,width,height;
        public Rect(int x,int y,int width,int height){
            super();
            this.x=x;
            this.y=y;
            this.width=width;
            this.height=height;
        }
        public int getX(){
            return x;
        }
        public int getY(){
            return y;
        }
        public int getWidth(){
            return width;
        }
        public int getHeight(){
            return height;
        }
        public void setX(int x){
            this.x=x;
        }
        public void setY(int y){
            this.y=y;
        }
        public void setWidth(int width){
            this.width=width;
        }
        public void setHeight(int height){
            this.height=height;
        }
    }
    public class Triangle{
        int x1,y1,x2,y2,x3,y3;
        public Triangle(int x1,int y1,int x2,int y2,int x3,int y3){
            super();
            this.x1=x1;
            this.y1=y1;
            this.x2=x2;
            this.y2=y2;
            this.x3=x3;
            this.y3=y3;
        }
        public int getX1(){
            return x1;
        }
        public int getY1(){
            return y1;
        }
        public int getX2(){
            return x2;
        }
        public int getY2(){
            return y2;
        }
        public int getX3(){
            return x3;
        }
        public int getY3(){
            return y3;
        }
        public void setX1(int x1){
            this.x1=x1;
        }
        public void setY1(int y1){
            this.y1=y1;
        }
        public void setX2(int x2){
            this.x2=x2;
        }
        public void setY2(int y2){
            this.y2=y2;
        }
        public void setX3(int x3){
            this.x3=x3;
        }
        public void setY3(int y3){
            this.y3=y3;
        }
    }
    public class Car{
        private Circle frontWheel;
        private Circle backWheel;
        private Rect body;
        private Triangle head;
        public Circle getFrontWheel(){
            return frontWheel;
        }
        public Circle getBackWheel(){
            return backWheel;
        }
        public Rect getBody(){
            return body;
        }
        public Triangle getHead(){
            return head;
        }
        public void setFrontWheel(Circle fw){
            frontWheel=fw;
        }
        public void setBackWheel(Circle bw){
            backWheel=bw;
        }
        public void setBody(Rect b){
            body=b;
        }
        public void setHead(Triangle h){
            head=h;
        }
    }
    public abstract class Builder{
        protected Car car = new Car();
        public abstract void buildFrontWheel();
        public abstract void buildBackWheel();
        public abstract void buildBody();
        public abstract void buildHead();
        public Car createCar(){
            return car;
        }
    }
    public class ConcreateBuilder extends Builder{
        @Override
        public void buildFrontWheel() {
            Circle frontWheel = new Circle(300,200,50,50);
            car.setFrontWheel(frontWheel);
        }
        @Override
        public void buildBackWheel() {
            Circle backWheel = new Circle(450,200,50,50);
            car.setBackWheel(backWheel);
        }
        @Override
        public void buildBody() {
            Rect body = new Rect(270,150,260,50);
            car.setBody(body);
        }
        @Override
        public void buildHead() {
            Triangle head = new Triangle(500,110,470,150,530,150);
            car.setHead(head);
        }
    }
    public class Director{
        private Builder builder;
        public Director(Builder builder){
            this.builder=builder;
        }
        public void setBuilder(Builder builder) {
            this.builder = builder;
        }
        public Car construct(){
            builder.buildFrontWheel();
            builder.buildBackWheel();
            builder.buildBody();
            builder.buildHead();
            return builder.createCar();
        }
    }
    public class MyPanel extends JPanel{
        Director director = new Director(new ConcreateBuilder());
        Car car = director.construct();
        Circle fW = car.getFrontWheel();
        Circle bW = car.getBackWheel();
        Rect body = car.getBody();
        Triangle head = car.getHead();
        @Override
        public void paint(Graphics g){
            g.drawOval(fW.getX(),fW.getY(),fW.getWidth(),fW.getHeight());
            g.drawOval(bW.getX(),bW.getY(),bW.getWidth(),bW.getHeight());
            g.drawRect(body.getX(),body.getY(),body.getWidth(),body.getHeight());
            g.drawLine(head.getX1(),head.getY1(),head.getX2(),head.getY2());
            g.drawLine(head.getX1(),head.getY1(),head.getX3(),head.getY3());
        }
    }
    public class MyFrame extends JFrame  {
        private MyPanel panel = new MyPanel();
        public MyFrame(){
            this.setTitle("BuilderPattern");
            this.setSize(800,400);
            this.setVisible(true);
            this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            add(panel);
        }
    }
    public static void main(String [] args){
        BuilderPattern.MyFrame f = new BuilderPattern().new MyFrame();
    }
}