public class Computer {
    private String hardDisk ;
    private String CPU;
    private String mainboard ;

    public void setHardDisk(String hardDisk) {
        this.hardDisk = hardDisk;
    }
    public void setCPU(String CPU) {
        this.CPU = CPU;
    }
    public void setMainboard(String mainboard) {
        this.mainboard = mainboard;
    }

    public void start()
    {
        System.out.println(hardDisk+"  "+CPU+"   "+ mainboard +"    辦公");
    }

    public void work()
    {
        System.out.println(hardDisk+"  "+CPU+"   "+ mainboard +"    辦公");
    }

    public void play()
    {
        System.out.println(hardDisk+"  "+CPU+"   "+ mainboard +"    娛樂");
    }
}

public abstract class ComputerBulider {
    protected Computer acomputer = new Computer();

    public abstract void buildCPU();

    public abstract void buildHardDisk();

    public abstract void buildMainboard();

    //關鍵代碼需要返回一個產(chǎn)品的對象
    public Computer getComputer(){
        return acomputer;
    }
}

public class DellBulider extends ComputerBulider {
    @Override
    public void buildCPU() {
        acomputer.setCPU("dell CPU");
    }

    @Override
    public void buildHardDisk() {
        acomputer.setHardDisk("dell 硬盤");
    }

    @Override
    public void buildMainboard() {
        acomputer.setMainboard("dell 主板");
    }
}

public class LenovoBulider extends ComputerBulider {
    @Override
    public void buildCPU() {
        acomputer.setCPU("聯(lián)想 CPU");
    }

    @Override
    public void buildHardDisk() {
        acomputer.setHardDisk("聯(lián)想 硬盤");
    }

    @Override
    public void buildMainboard() {
        acomputer.setMainboard("聯(lián)想 主板");
    }
}

//指揮者，接收指令安排建造者根據(jù)一定的工序去制作產(chǎn)品
public class Director {
    private ComputerBulider computerBuilder;
    public Director(ComputerBulider comBuilder) {
        this.computerBuilder = comBuilder;
    }
    public Computer construct(){
        //安裝主板
        computerBuilder.buildMainboard();
        //安裝cpu
        computerBuilder.buildCPU();
        //安裝硬盤
        computerBuilder.buildHardDisk();

        //準備完畢，返回一個完整的計算機給調(diào)用者
        return computerBuilder.getComputer();
    }
}