书本第四章编程练习

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public  class Main {    public static void main(String args[]) {        CPU cpu = new CPU();        cpu.setSpeed(2200);        HardDisk disk = new HardDisk();        disk.setAmount(200);        PC PC = new PC();        pc.setCPU(CPU);        PC.setHardDisk(disk);        pc.show();    }}    public class CPU {        int speed;        int getSeed() {            return speed;        }        public void setSpeed(int speed) {            this.speed = speed;        }    }   public  class HardDisk {        int amount;        int getAount() {            return amount;        }        public void setAmount(int amount) {            this.amount = amount;        }    }    public class PC {        CPU cpu;        HardDisk disk;        void setCpu(CPU cpu) {            this.cpu = cpu;        }        void setHardDisk(HardDisk disk) {            this.disk = disk;        }        void show() {            System.out.println("这个CPU的速度为:" + cpu.getSeed());            System.out.println("这个硬盘的容量为:" + disk.getAount());        }    }

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