Java chapter04-1

public class CPU {
	int speed;
	//获得speed的值
	public void setSpeed(int m){
		speed = m;
	}
	//返回speed的值

	public int getSpeed(){
		return speed;
	}

}

public class HardDisk {
	int amount;
	//获得amount的值
	public void setSpeed(int m){
		amount = m;
	}
	//返回amount的值

	public int getSpeed(){
		return amount;
	}

}

public class PC {
	CPU cpu = new CPU();
	HardDisk HD = new HardDisk();
	//将参数c的值赋值给cpu
	public void setCPU(CPU c){
		cpu = c;
	}
	//将参数h的值赋值给HD
	public void setHardDisk(HardDisk h){
		HD = h;
	}
	//显示cpu的速度和硬盘的容量
	public void show(){
		System.out.println(cpu.speed);
		System.out.println(HD.amount);
	}
}

public class Test {
	public static void main(String[] args){
		CPU cpu = new CPU();
		HardDisk disk = new HardDisk();
		PC pc = new PC();
		cpu.setSpeed(2200);
		disk.setSpeed(200);
		pc.setCPU(cpu);
		pc.setHardDisk(disk);
		pc.show();
	}
}