【Java】CPU类

 编写应用程序描述计算机中CPU的速度和硬盘容量。一个CPU类（属性：speed，方法：setSpeed(int speed)，getSpeed()），一个HardDisk类（属性：amount，方法：set Amount (int amount)，get Amount ()），一个PC类（属性：CPU ，HardDisk HD，方法：setCPU(CPU cpu)，setHardDisk(HardDisk HD)，show()），一个Test主类。Test类的 main 方法中创建（new关键字）PC类的实例然后显示CPU的速度和硬盘容量。

class CPU{
    private int speed;
    public void setSpeed(int speed){
        this.speed = speed;
    }
    public int getSpeed(){
        return speed;
    }
}
class HardDisk{
    private int amount;
    public void setAmount(int amount){
        this.amount = amount;
    }
    public int getAmount(){
        return amount;
    }
}
class PC{
    CPU cpu;
    HardDisk hd;
    public void setCPU(CPU cpu){
        this.cpu = cpu;
    }
    public void setHardDisk(HardDisk hd){
        this.hd = hd;
    }
    public void show(){
        System.out.println(cpu.getSpeed());
        System.out.println(hd.getAmount());
    }
}
public class Main {
    public static void main(String[] args) {
        PC pc = new PC();
        CPU cpu = new CPU();
        HardDisk hd = new HardDisk();
        cpu.setSpeed(100);
        hd.setAmount(200);
        pc.setCPU(cpu);
        pc.setHardDisk(hd);
        pc.show();
    }
}