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 setAmount(int m){amount = m;}//返回amount的值public int getAmount(){return amount;}}

public class PC {CPU cpu = new CPU();HardDisk HD = new HardDisk();//将参数c的值赋值给cpupublic void setCPU(CPU c){cpu = c;}//将参数h的值赋值给HDpublic 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.getSpeed);System.out.println(HD.getAmount);}}

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();}}