JFrame

JFrame创建及基本用法

package com.fxb.gui;

import java.awt.Button;
import java.awt.FileDialog;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.PopupMenu;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;

public class Test1 {

    private static StringBuilder builder = new StringBuilder();
    public static void pt(Object a){
        builder.setLength(0);
        builder.append(a);
        System.out.println(builder.toString());
    }

    public static void main(String[] args){
        final Frame frame = new Frame("MyFrame");
        frame.setSize(500, 400);
        frame.setLocation(300, 200);
        frame.setLayout(new FlowLayout());

        Button button1 = new Button("Button1");
        frame.add(button1);

        Button button2 = new Button("Button2");
        frame.add(button2);

        Button button3 = new Button("Button3");
        frame.add(button3);

        TextField field = new TextField(20);
//        field.setSize(100, 10);
        frame.add(field);

        WindowListener listener1 = new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.out.println("Closing!");
                System.exit(0);
            }
            public void windowActivated(WindowEvent e) {
                System.out.println("Actived!");
            }
            public void windowClosed(WindowEvent e) {
                System.out.println("Closed!");
            }
            public void windowOpened(WindowEvent e) {
                System.out.println("Opened!");
            }
        };
        frame.addWindowListener(listener1);

        ActionListener listener2 = new ActionListener(){
            public void actionPerformed(ActionEvent e) {
                System.out.println("Exit!");
                System.exit(0);
            }
        };
        button1.addActionListener(listener2);

        final JPopupMenu popupMenu = new JPopupMenu("Popup");
        popupMenu.add(new JMenuItem("Pop1"));
        popupMenu.add(new JMenuItem("Pop2"));
        popupMenu.add(new JMenuItem("Pop3"));

//        final PopupMenu popupMenu = new PopupMenu("Popup");
//        popupMenu.add(new MenuItem("Pop1"));
//        popupMenu.add(new MenuItem("Pop2"));
//        popupMenu.add(new MenuItem("Pop3"));
//        frame.add(popupMenu);

        MouseListener listener3 = new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {

                if(e.getButton() == MouseEvent.BUTTON3){
                    popupMenu.show(e.getComponent(), e.getX(), e.getY());
                }else{
                    if(e.getClickCount() == 2){
                        pt("Double click");
                    }else if(e.getClickCount() == 1){
                        pt("Single click");
                    }
                }
            }

            public void mouseWheelMoved(MouseWheelEvent e) {
                pt("Wheel move");
            }
            public void mouseDragged(MouseEvent e) {
                pt("Mouse drag");
            }
            public void mouseMoved(MouseEvent e) {
                pt("Mouse move");
            }
        };
        frame.addMouseListener(listener3);

        frame.setVisible(true);

        final FileDialog openDialog = new FileDialog(frame, "Open", FileDialog.LOAD);
        final FileDialog saveDialog = new FileDialog(frame, "Save", FileDialog.SAVE);

        MenuBar menuBar = new MenuBar();

        final Menu menu1 = new Menu("文件");
        final MenuItem[] items = new MenuItem[3];
        ActionListener actionListener = new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if(e.getSource() == items[1]){
                    pt("Open");
                    openDialog.setVisible(true);

                    String strDir = openDialog.getDirectory();
                    String strFile = openDialog.getFile();
                    pt(strDir+strFile);
                }
                else if(e.getSource() == items[2]){
                    pt("Save");
                    saveDialog.setVisible(true);
                }
            }
        };

        String[] strs = new String[]{"新建", "打开", "保存"};
        for(int i=0; i<items.length; ++i){
            items[i] = new MenuItem(strs[i]);
            items[i].addActionListener(actionListener);
            menu1.add(items[i]);
        }

        Menu menu2 = new Menu("编辑");
        menu2.add(new MenuItem("复制"));
        menu2.add(new MenuItem("剪切"));
        menu2.add(new MenuItem("粘贴"));

        menuBar.add(menu1);
        menuBar.add(menu2);
        frame.setMenuBar(menuBar);

//        frame.add(openDialog);
//        frame.add(saveDialog);

    }

}