package test0;
import java.util.Comparator;
//限定修飾符為friend不能為public，一個java文件中只能有一個public類
/***
 * java程序是從一個public類的main函數(shù)開始執(zhí)行的，
 *（其實是main線程），就像c程序是從main（）函數(shù)開始執(zhí)行一樣。  
 * 只能有一個public類是為了給類裝載器提供方便。
 */
interface MyComparable<T>{   //接口類--抽象類
  
  public int compare(T agr0); //抽象方法--在子類中實現(xiàn)
  
}
class student implements Comparable<student> {
  private String name="zhang";
  private int num=12;

  @Override
  public String toString() {
    return "名字為:" + name +","+ "學號為:" + num;
  }
  @Override
  public int compareTo(student arg0) {
    
    return this.num-arg0.num;
  }  
}
class teacher implements Comparator<student> {
  private String name="zhang";
  private int num=12;

  @Override
  public String toString() {
    return "名字為:" + name +","+ "學號為:" + num;
  }
  @Override
  public int compare(student arg0, student arg1) {
    // TODO Auto-generated method stub
    return 0;
  } 
}
public class Test {
  
  public static void main(String[] args) {
    teacher space=new teacher();
    
  }
}