java求闰年

Ⅰ 用java程序判断是否是闰年

以下为代码：

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

public class LeapyearTest extends Applet implements ActionListener{

Label lblResult;

Button btn;

TextField txt;

int year;

boolean leap;

public void init() {

lblResult=new Label("请输入要判断的年份");

txt=new TextField(5);

btn=new Button("判断");

add(lblResult);

add(txt);

add(btn);

btn.addActionListener(this);

}

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

year=Integer.parseInt(txt.getText());

if(year%4==0&;&;(year%100)!=0)

{leap=true;

}

else if(year%400==0){

leap=false;

}

if(leap==true)

lblResult.setText(year+"年是闰年");

else

lblResult.setText(year+"年是平年");

txt.setText("");

}

}