第二次作业，模拟sim卡与手机

package test;

public class Phone {
 SIM sim;

 public SIM getSim() {
  return sim;
 }

 public void setSim(SIM sim) {
  this.sim = sim;
 }

 public String getNumber() {
  return sim.number;
 }

 public String getOperator() {
  return sim.Operator;
 }

 /**
  * @param sim
  */
 public Phone(SIM sim) {
  this.sim = sim;
 }

 public static void main(String[] args) {
  // TODO Auto-generated method stub
  SIM mobile = new SIM("18375437854", "移不动");
        SIM unicom=new SIM("18375432143","联不通");
        Phone myphone=new Phone(mobile);
        System.out.println(myphone.getNumber());
        System.out.println(myphone.getOperator());
        System.out.println();
        myphone.setSim(unicom);
        System.out.println(myphone.getNumber());
        System.out.println(myphone.getOperator());
 }
}