JAVA课程4 类 描述计算机CPU速度与硬盘容量

class CPU
{
int Speed;

void setSpeed(int m)
{
Speed=m;
}

int getSpeed()
{
return Speed;
}
}

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

class PC
{
CPU cpu;
void setCPU(CPU c)
{
cpu=c;
}
HardDisk HD;
void setHardDisk(HardDisk h)
{
HD=h;
}
void Show()
{
System.out.printf("CPU's Speed："+ cpu.getSpeed());
System.out.printf( " ");
System.out.printf("HardDisk's Amount："+ HD.getAmount());
}
}

public class Tst
{
public static void main(String args[])
{
CPU cpu=new CPU();
cpu.setSpeed(2220);
HardDisk disk=new HardDisk();
disk.setAmount(220);
PC pc=new PC();
pc.setCPU(cpu);
pc.setHardDisk(disk);
pc.Show();
}
}