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();

	}

}