studentint_ex.java

来自「非常好的JAVA学习资料」· Java 代码 · 共 20 行

import java.util.*;
interface Birth
{ int agetoyear(int a);}
class Person implements Birth
{ protected String name;
  protected int age;
  public void setPerson(String na,int ag)
  {name=na;age=ag;}
  public int agetoyear(int cy)
  { return cy-age+1;}
 }
public class Studentint_ex
{public static void main(String args[])
 {Person pe=new Person();
  Calendar now=Calendar.getInstance();
  int  year=now.get(Calendar.YEAR);
  pe.setPerson("Tom",20);
  System.out.println("The object of Person:  "+pe.name+","+pe.age);
  System.out.println("born in "+pe.agetoyear(year));}
}