Java练习题9

public class SIM {
	long number;
    SIM(long number){
        this.number=number;
    }
    long getNumber(){
        return number;
    }
}
public class Phone {
	 SIM sim;
	 void setSIM(SIM card){
		 sim=card;
	 }
	 long lookNumber(){
	     return sim.getNumber();
	 }
}
public class Test9 {
	public static void main(String[] args) {
		SIM sim1=new SIM(11111111111L);
        Phone phone=new Phone();
        phone.setSIM(sim1);
        System.out.println("手机号码："+phone.lookNumber());
        SIM sim2=new SIM(22222222222L);
        phone.setSIM(sim2);
        System.out.println("手机号码："+phone.lookNumber());
	}
}