JavaSe基础XX19——GUI

*01-GUI(概述)

图形用户界面编程（GUI，）

很少。一般开发者都会用C++或者Delphi。

---GUI

---CLI命令行用户接口

JavaWeb方向用不着这块。

但有一项机制很重要。

awt,swing这两个包

组件！

窗体能独立存在。

面板是窗体里的一个东西。面板不能独立存在。

坐标式布局。

组件放在面板里面。

Java是要手写的。。。

*02-GUI(Frame演示)

开发流程：查看父类，编写子类，

*03-GUI(事件监听机制)

*04-GUI(ActionListener演示)

package cn.itcast.gui.p1.awt;import java.awt.Button;import java.awt.FlowLayout;import java.awt.Frame;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class FrameDemo {/** * @param args */public static void main(String[] args) {Frame f = new Frame("my frame");//f.setSize(500, 400);//f.setLocation(400, 200);f.setBounds(400, 200, 500, 400);f.setLayout(new FlowLayout());//设置流式布局Button but  = new Button("一个按钮");f.add(but);//将按钮添加到窗体中。 f.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {//System.out.println("closing......."+e);System.exit(0);}});//在按钮上加上一个监听。but.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {//System.out.println("button run .....");System.exit(0);}});f.setVisible(true);System.out.println("over");}}

*05-GUI(鼠标事件)&*06-GUI(键盘事件)

package cn.itcast.gui.p1.awt;import java.awt.Button;import java.awt.FlowLayout;import java.awt.Frame;import java.awt.TextField;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class MouseAndKeyDemo {private Frame f;private TextField tf;private Button but;public MouseAndKeyDemo() {init();}private void init() {f = new Frame("演示鼠标和键盘监听");f.setBounds(400,200,500,400);f.setLayout(new FlowLayout());tf = new TextField(35);but = new Button("一个按钮");f.add(tf);f.add(but);myEvent();f.setVisible(true);}private void myEvent() {//给文本框添加键盘监听。tf.addKeyListener(new KeyAdapter() {@Overridepublic void keyPressed(KeyEvent e) {//System.out.println("key run..."+KeyEvent.getKeyText(e.getKeyCode())+"::::"+e.getKeyCode());//int code = e.getKeyCode();//if(!(code>=KeyEvent.VK_0 && code<=KeyEvent.VK_9)){//System.out.println("必须是数字");//e.consume();//}if(e.isControlDown() && e.getKeyCode()==KeyEvent.VK_ENTER){System.out.println("enter run ...");}}});f.addWindowListener(new WindowAdapter() {@Overridepublic void windowClosing(WindowEvent e) {System.exit(0);}});but.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {//System.out.println("action run.....");}});//在按钮上添加一个鼠标监听.but.addMouseListener(new MouseAdapter() {private int count = 1;@Overridepublic void mouseEntered(MouseEvent e) {//System.out.println("mouse enter..."+count++);//tf.setText("mouse enter..."+count++);}@Overridepublic void mouseClicked(MouseEvent e) {if(e.getClickCount()==2)tf.setText("mouse double click..."+count++);//System.out.println("mouse click..."+count++);//System.out.println(e);}});}/** * @param args */public static void main(String[] args) {new MouseAndKeyDemo();}}

*07-GUI(Swing演示&装插件)

package cn.itcast.swing.demo;import java.awt.BorderLayout;import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.WindowConstants;import javax.swing.SwingUtilities;/*** This code was edited or generated using CloudGarden's Jigloo* SWT/Swing GUI Builder, which is free for non-commercial* use. If Jigloo is being used commercially (ie, by a corporation,* company or business for any purpose whatever) then you* should purchase a license for each developer using Jigloo.* Please visit www.cloudgarden.com for details.* Use of Jigloo implies acceptance of these licensing terms.* A COMMERCIAL LICENSE HAS NOT BEEN PURCHASED FOR* THIS MACHINE, SO JIGLOO OR THIS CODE CANNOT BE USED* LEGALLY FOR ANY CORPORATE OR COMMERCIAL PURPOSE.*/public class MySwing extends javax.swing.JFrame {private JButton jButton1;/*** Auto-generated main method to display this JFrame*/public static void main(String[] args) {SwingUtilities.invokeLater(new Runnable() {public void run() {MySwing inst = new MySwing();inst.setLocationRelativeTo(null);inst.setVisible(true);}});}public MySwing() {super();initGUI();}private void initGUI() {try {getContentPane().setLayout(null);setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);{jButton1 = new JButton();getContentPane().add(jButton1);jButton1.setText("\u9000\u51fa");jButton1.setBounds(142, 26, 103, 48);jButton1.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent evt) {jButton1ActionPerformed(evt);}});}pack();setSize(400, 300);} catch (Exception e) {    //add your error handling code heree.printStackTrace();}}private void jButton1ActionPerformed(ActionEvent evt) {//System.out.println("jButton1.actionPerformed, event="+evt);//TODO add your code for jButton1.actionPerformedSystem.exit(0);}}

*08-GUI(练习-列出目录内容)

package cn.itcast.swing.demo;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.io.File;import javax.swing.JButton;import javax.swing.JEditorPane;import javax.swing.JScrollBar;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JTextField;import javax.swing.SwingUtilities;import javax.swing.WindowConstants;/*** This code was edited or generated using CloudGarden's Jigloo* SWT/Swing GUI Builder, which is free for non-commercial* use. If Jigloo is being used commercially (ie, by a corporation,* company or business for any purpose whatever) then you* should purchase a license for each developer using Jigloo.* Please visit www.cloudgarden.com for details.* Use of Jigloo implies acceptance of these licensing terms.* A COMMERCIAL LICENSE HAS NOT BEEN PURCHASED FOR* THIS MACHINE, SO JIGLOO OR THIS CODE CANNOT BE USED* LEGALLY FOR ANY CORPORATE OR COMMERCIAL PURPOSE.*/public class MyWindow extends javax.swing.JFrame {private static final String LINE_SEPARATOR = System.getProperty("line.separator");private JTextField jTextField1;private JButton jButton1;private JTextArea jTextArea1;private JScrollPane jScrollPane1;/*** Auto-generated main method to display this JFrame*/public static void main(String[] args) {SwingUtilities.invokeLater(new Runnable() {public void run() {MyWindow inst = new MyWindow();inst.setLocationRelativeTo(null);inst.setVisible(true);}});}public MyWindow() {super();initGUI();}private void initGUI() {try {setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);getContentPane().setLayout(null);{jTextField1 = new JTextField();getContentPane().add(jTextField1, "Center");jTextField1.setBounds(12, 41, 368, 34);jTextField1.addKeyListener(new KeyAdapter() {public void keyPressed(KeyEvent evt) {jTextField1KeyPressed(evt);}});}{jButton1 = new JButton();getContentPane().add(jButton1);jButton1.setText("\u8f6c\u5230");jButton1.setBounds(397, 41, 99, 34);jButton1.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent evt) {jButton1ActionPerformed(evt);}});}{jScrollPane1 = new JScrollPane();getContentPane().add(jScrollPane1);jScrollPane1.setBounds(12, 87, 484, 356);{jTextArea1 = new JTextArea();jScrollPane1.setViewportView(jTextArea1);}}pack();this.setSize(523, 482);} catch (Exception e) {    //add your error handling code heree.printStackTrace();}}private void jButton1ActionPerformed(ActionEvent evt) {showDir();}/** *  */public void showDir() {/* * 通过点击按钮获取文本框中目录， * 将目录中的内容显示在文本区域中。 */String dir_str = jTextField1.getText();File dir = new File(dir_str);if(dir.exists() && dir.isDirectory()){jTextArea1.setText("");String[] names = dir.list();for(String  name : names){jTextArea1.append(name+LINE_SEPARATOR);}}}private void jTextField1KeyPressed(KeyEvent evt) {if(evt.getKeyCode()==KeyEvent.VK_ENTER)showDir();}}

*09-GUI(菜单)

*10-GUI(练习)

package cn.itcast.swing.demo;import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import javax.swing.JDialog;import javax.swing.JFileChooser;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.SwingUtilities;import javax.swing.WindowConstants;/*** This code was edited or generated using CloudGarden's Jigloo* SWT/Swing GUI Builder, which is free for non-commercial* use. If Jigloo is being used commercially (ie, by a corporation,* company or business for any purpose whatever) then you* should purchase a license for each developer using Jigloo.* Please visit www.cloudgarden.com for details.* Use of Jigloo implies acceptance of these licensing terms.* A COMMERCIAL LICENSE HAS NOT BEEN PURCHASED FOR* THIS MACHINE, SO JIGLOO OR THIS CODE CANNOT BE USED* LEGALLY FOR ANY CORPORATE OR COMMERCIAL PURPOSE.*/public class MyMenu extends javax.swing.JFrame {private static final String LINE_SEPARATOR = System.getProperty("line.separator");private JMenuBar jMenuBar1;private JScrollPane jScrollPane1;private JMenuItem jMenuItem2;private JTextArea jTextArea1;private JMenuItem jMenuItem1;private JMenu jMenu1;private JFileChooser chooser;private JDialog dialog;/*** Auto-generated main method to display this JFrame*/public static void main(String[] args) {SwingUtilities.invokeLater(new Runnable() {public void run() {MyMenu inst = new MyMenu();inst.setLocationRelativeTo(null);inst.setVisible(true);}});}public MyMenu() {super();initGUI();}private void initGUI() {try {setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);{jScrollPane1 = new JScrollPane();getContentPane().add(jScrollPane1, BorderLayout.CENTER);{jTextArea1 = new JTextArea();jScrollPane1.setViewportView(jTextArea1);}}{jMenuBar1 = new JMenuBar();setJMenuBar(jMenuBar1);{jMenu1 = new JMenu();jMenuBar1.add(jMenu1);jMenu1.setText("\u6587\u4ef6");{jMenuItem1 = new JMenuItem();jMenu1.add(jMenuItem1);jMenuItem1.setText("\u6253\u5f00");jMenuItem1.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent evt) {try {jMenuItem1ActionPerformed(evt);} catch (IOException e) {e.printStackTrace();}}});}{jMenuItem2 = new JMenuItem();jMenu1.add(jMenuItem2);jMenuItem2.setText("\u4fdd\u5b58");jMenuItem2.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent evt) {try {jMenuItem2ActionPerformed(evt);} catch (IOException e) {e.printStackTrace();}}});}}}pack();this.setSize(610, 402);} catch (Exception e) {    //add your error handling code heree.printStackTrace();}}private void jMenuItem1ActionPerformed(ActionEvent evt) throws IOException {chooser = new JFileChooser();//    FileNameExtensionFilter filter = new FileNameExtensionFilter(//        "JPG & GIF Images", "jpg", "gif");//    chooser.setFileFilter(filter);        int returnVal = chooser.showOpenDialog(this);if(returnVal == JFileChooser.CANCEL_OPTION){System.out.println("没有选取文件，取消了");return;}    File file = chooser.getSelectedFile();BufferedReader bufr = new BufferedReader(new FileReader(file));String line = null;while((line=bufr.readLine())!=null){jTextArea1.append(line+LINE_SEPARATOR);}bufr.close();}private void jMenuItem2ActionPerformed(ActionEvent evt) throws IOException {chooser = new JFileChooser();int returnVal = chooser.showSaveDialog(this);if(returnVal == JFileChooser.CANCEL_OPTION){System.out.println("没有指定文件，取消了");return;}File file = chooser.getSelectedFile();String text = jTextArea1.getText();BufferedWriter bufw = new BufferedWriter(new FileWriter(file));bufw.write(text);bufw.close();}}