用类描述计算机中CPU的速度和硬盘的容量。（Java）

PC.java

public class PC {
	CPU cpu;
	HardDisk HD;
	public void setCPU(CPU c) {
		this.cpu = c;
	}
	
	public void setHardDisk(HardDisk h) {
		HD = h;
	}
	
	public void show() {
		System.out.println("cpu: " +cpu.getSeepd());
		System.out.println("Hd: "+HD.getAmount());
	}

	
}

　　CPU.java

public class CPU {
	private int speed;
	
	public void setSeepd(int m) {
		this.speed = m;
	}
	public int getSeepd() {
		return speed;
	}
}

　　HardDisk.java

public class HardDisk {
	int amount;
	public void setAmount(int m) {
		this.amount = m;
	}
	
	public int getAmount() {
		return amount;
	}
}

　　Test.java

public class Test {
	public static void main(String[] args) {
		CPU cpu =new CPU();
		cpu.setSeepd(2000);
		
		HardDisk disk = new HardDisk();
		disk.setAmount(200);
		
		PC pc =new PC();
		pc.setCPU(cpu);
		pc.setHardDisk(disk);
		pc.show();
	}
}

　　运行结果：