GUI

原创

小小轩闲鱼 2011-09-29 20:39:33 ©著作权

文章标签 职场 GUI 休闲 Swing JFrame 文章分类 Java 后端开发

©著作权归作者所有：来自51CTO博客作者小小轩闲鱼的原创作品，请联系作者获取转载授权，否则将追究法律责任

Swing概述
Swing典型组件
  JFrame
  Swing按钮、菜单和工具条
  Swing标准对话框
  表格和树
  定时器

JFrame实现了java.swing.WindowConstants接口
Eg：
import java.awt.Color;
import java.awt.FlowLayout;

import javax.swing.JButton;
import javax.swing.JFrame;

public class TestJFrame {

  public static void main(String[] args) {
    JFrame jf = new JFrame("JFrame");
    JButton b1 = new JButton("Start");
    JButton b2 = new JButton("Stop");

    jf.add(b1);
    jf.add(b2);
    jf.setBackground(Color.blue);
    jf.setLayout(new FlowLayout(FlowLayout.CENTER,20,20));
    jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//默认的退出方式
    jf.setLocation(400, 300);
    jf.setSize(300, 200);
    jf.setVisible(true);
//    jf.dispose();
  }

}

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.Timer;

public class TestTime {

  public static void main(String[] args) {
    JFrame f =    new JFrame("Time");
    Button b1 = new Button("Start");
    Button b2 = new Button("Stop");
    JLabel click = new JLabel("显示日期");

    f.add(b1);
    f.add(b2);
    f.add(click,"North");
    click.setOpaque(true);
    click.setDefaultLocale(null);
    click.setBackground(Color.LIGHT_GRAY);

    f.setSize(400, 400);
    b1.setBackground(Color.green);
    b2.setBackground(Color.cyan);
    f.setLocation(400, 300);
    f.setBackground(Color.blue);
    f.setLayout(new FlowLayout(FlowLayout.CENTER,20,20));
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//默认的退出方式
    f.setVisible(true);

    MyListener m = new MyListener(click);
    Timer t = new Timer(1000,m);
    t.restart();
  }

}

  class MyListener implements ActionListener{

    private JLabel click;


    public MyListener(JLabel click) {
      this.click = click;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
      Date d = new Date();
      Calendar c = new GregorianCalendar();
      String time = c.get(Calendar.YEAR)+"-"+c.get(Calendar.MONTH)+"-"+c.get(Calendar.DATE);
      int h = c.get(Calendar.HOUR_OF_DAY);
      int m = c.get(Calendar.MINUTE);
      int s = c.get(Calendar.SECOND);
      time += "\n time:"+h +": "+m +": "+s;
      click.setText(time);
      System.out.println(d);
      click.repaint();
    }
  }