标签：des style class blog code java
（一）Swing概述
将Swing组件按功能来分:
->顶层容器: JFrame、JApplet、JDialog和JWindow
->中间容器: JPanel、JScrollPane、JSplitPane、JToolBar等
->特殊容器:在用户界面上具有特殊作用的中间容器,如JInternalFrame、JRootPane、JLayeredPane和JDestopPane等
->基本组件:实现人机交互的组件,如JButton、JComboBox、JList、JMenu、JSlider等
->不可编辑信息的显示组件:向用户显示不可编辑信息的组件,如JLabel、JProgressBar和JToolTip等
->可编辑信息的显示组件:向用户显示能被编辑的格式化信息的组件,如JTable、JTextArea和JTextField等
->特殊对话框组件:可以直接产生特殊对话框的组件,如JColorChooser和JFileChooser等
Swing 提供了多种独立于各种平台的LAF（Look And Feel）,为了获取获取当前JRE所支持的LAF,可以借助于UIManager的getInstalledLookAndFeels()方法,如下程序所示:
import javax.swing.UIManager; public class AllLookAndFeel { public static void main(String[] args) { System.out.println("当前系统可用的所有LAF:"); for(UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) { System.out.println(info.getName() + "---->"+info); } } } //运行结果: 当前系统可用的所有LAF: Metal---->javax.swing.UIManager$LookAndFeelInfo[Metal javax.swing.plaf.metal.MetalLookAndFeel] Nimbus---->javax.swing.UIManager$LookAndFeelInfo[Nimbus javax.swing.plaf.nimbus.NimbusLookAndFeel] CDE/Motif---->javax.swing.UIManager$LookAndFeelInfo[CDE/Motif com.sun.java.swing.plaf.motif.MotifLookAndFeel] Windows---->javax.swing.UIManager$LookAndFeelInfo[Windows com.sun.java.swing.plaf.windows.WindowsLookAndFeel] Windows Classic---->javax.swing.UIManager$LookAndFeelInfo[Windows Classic com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel]
下面程序示范了使用Swing组件来创建窗口应用,该窗口里包含了菜单、右键菜单以及基本AWT组件的Swing实现。
import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.InputEvent; import javax.swing.Box; import javax.swing.ButtonGroup; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JCheckBoxMenuItem; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JList; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPanel; import javax.swing.JPopupMenu; import javax.swing.JRadioButton; import javax.swing.JRadioButtonMenuItem; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.KeyStroke; import javax.swing.SwingUtilities; import javax.swing.UIManager; public class SwingComponent { private JFrame f = new JFrame("测试"); //定义一个按钮,并为之指定图标 private Icon okIcon = new ImageIcon("ico/ok.png"); private JButton ok = new JButton("确认",okIcon); //定义一个单选按钮,初始处于选中状态 private JRadioButton male = new JRadioButton("男",true); //定义一个单选按钮,初始处于没有选择状态 private JRadioButton female = new JRadioButton("女",false); //定义一个ButtonGroup,用于将上面两个JRadioButton组合在一起 private ButtonGroup bg = new ButtonGroup(); //定义一个复选框,初始处于没有选择状态 private JCheckBox married = new JCheckBox("是否已婚?",false); private String[] colors = new String[]{"红色","绿色","蓝色"}; //定义一个下拉选择框 private JComboBox<String> colorChooser = new JComboBox<>(colors); //定义一个列表选择框 private JList<String> colorList = new JList<>(colors); //定义一个8行、20列的多行文本域 private JTextArea ta = new JTextArea(8,20); //定义一个40列的单行文本域 private JTextField name = new JTextField(40); private JMenuBar mb = new JMenuBar(); private JMenu file = new JMenu("文件"); private JMenu edit = new JMenu("编辑"); //创建"新建"菜单项,并为之指定图标 private Icon newIcon = new ImageIcon("ico/new.png"); private JMenuItem newItem = new JMenuItem("新建",newIcon); //创建"保存"菜单项,并为之指定图标 private Icon saveIcon = new ImageIcon("ico/save.png"); private JMenuItem saveItem = new JMenuItem("保存",saveIcon); //创建"退出"菜单项 private Icon exitIcon = new ImageIcon("ico/exit.png"); private JMenuItem exitItem = new JMenuItem("退出",exitIcon); private JCheckBoxMenuItem autoWrap = new JCheckBoxMenuItem("自动换行 "); //创建"复制"菜单项,并为之指定图标 private JMenuItem copyItem = new JMenuItem("复制",new ImageIcon("ico/copy.png")); //创建"粘贴"菜单项,并为之指定图标 private JMenuItem pasteItem = new JMenuItem("粘贴",new ImageIcon("ico/paste.png")); private JMenu format = new JMenu("格式"); private JMenuItem commentItem = new JMenuItem("注释"); private JMenuItem cancelItem = new JMenuItem("取消注释"); //定义一个右键菜单用于设置程序风格 private JPopupMenu pop = new JPopupMenu(); //用于组合3个风格菜单项的ButtonGroup private ButtonGroup flavorGroup = new ButtonGroup(); //创建5个单选按钮,用于设定程序的外观风格 private JRadioButtonMenuItem metalItem = new JRadioButtonMenuItem("Metal风格",true); private JRadioButtonMenuItem nimbusItem = new JRadioButtonMenuItem("Nimbus风格"); private JRadioButtonMenuItem windowsItem = new JRadioButtonMenuItem("Windows风格"); private JRadioButtonMenuItem classicItem = new JRadioButtonMenuItem("Windows经典风格"); private JRadioButtonMenuItem motifItem = new JRadioButtonMenuItem("Motif风格"); //用于执行界面初始化的init方法 public void init() { //创建一个装载文本框、按钮的JPanel JPanel bottom = new JPanel(); bottom.add(name); bottom.add(ok); f.add(bottom,BorderLayout.SOUTH); //创建一个装载了下拉选择框、三个JCheckBox的JPanel JPanel checkPanel = new JPanel(); checkPanel.add(colorChooser); bg.add(male); bg.add(female); checkPanel.add(male); checkPanel.add(female); checkPanel.add(married); //创建一个垂直排列组件的Box,盛装多行文本域JPanel Box topLeft = Box.createVerticalBox(); //使用JScrollPane作为普通组件的JViewPort JScrollPane taJsp = new JScrollPane(ta); topLeft.add(taJsp); topLeft.add(checkPanel); //创建一个水平排列组件的Box,盛装topLeft、colorList Box top = Box.createHorizontalBox(); top.add(topLeft); top.add(colorList); //将top Box容器添加到窗口的中间 f.add(top); //下面开始组合菜单,并为菜单添加监听器 //为newItem设置快捷键,设置快捷键时要使用大写字母 newItem.setAccelerator(KeyStroke.getKeyStroke(‘N‘,InputEvent.CTRL_MASK)); newItem.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { ta.append("用户单击了 新建 菜单\n"); } }); //为file菜单添加菜单项 file.add(newItem); file.add(saveItem); file.add(exitItem); //为edit菜单添加菜单项 edit.add(autoWrap); //使用addSeparator方法添加菜单分隔线 edit.addSeparator(); edit.add(copyItem); edit.add(pasteItem); //为commentItem组件添加提示信息 commentItem.setToolTipText("将程序代码注释起来"); //为format菜单添加菜单项 format.add(commentItem); format.add(cancelItem); //使用添加new JMenuItem("-")的方式不能添加菜单分隔符 edit.add(new JMenuItem("-")); //将format菜单组合到edit菜单中,从而形成二级菜单 edit.add(format); //将file、edit菜单添加到mb菜单条中 mb.add(file); mb.add(edit); //为f窗口设置菜单条 f.setJMenuBar(mb); //下面开始组合右键菜单,并安装右键菜单 flavorGroup.add(metalItem); flavorGroup.add(nimbusItem); flavorGroup.add(windowsItem); flavorGroup.add(classicItem); flavorGroup.add(motifItem); pop.add(metalItem); pop.add(nimbusItem); pop.add(windowsItem); pop.add(classicItem); pop.add(motifItem); //为5个风格菜单创建事件监听器 ActionListener flavorListener = new ActionListener() { @Override public void actionPerformed(ActionEvent e) { try { switch(e.getActionCommand()) { case "Metal风格": { changeFlavor(1); break; } case "Nimbus风格": { changeFlavor(2); break; } case "Windows风格": { changeFlavor(3); break; } case "Windows经典风格": { changeFlavor(4); break; } case "Motif风格": { changeFlavor(5); break; } } } catch(Exception ee) { ee.printStackTrace(); } } }; //为5个风格菜单项添加事件监听器 metalItem.addActionListener(flavorListener); nimbusItem.addActionListener(flavorListener); windowsItem.addActionListener(flavorListener); classicItem.addActionListener(flavorListener); motifItem.addActionListener(flavorListener); //调用该方法即可设置右键菜单,无须使用事件机制 ta.setComponentPopupMenu(pop); //设置关闭窗口时,退出程序 f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.pack(); f.setVisible(true); } //定义一个方法,用于改变界面风格 private void changeFlavor(int flavor) throws Exception { switch(flavor) { //设置Metal风格 case 1: { UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel"); break; } //设置Nimbus风格 case 2: { UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel"); break; } //设置windows风格 case 3: { UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel"); break; } //设置windows经典风格 case 4: { UIManager.setLookAndFeel("Classic com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel"); break; } //设置Motif风格 case 5: { UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel"); break; } } //更新f窗口内顶级容器以及内部所有组件的UI SwingUtilities.updateComponentTreeUI(f.getContentPane()); //更新mb菜单条以及内部所有组件的UI SwingUtilities.updateComponentTreeUI(mb); //更新pop右键菜单以及内部所有组件的UI SwingUtilities.updateComponentTreeUI(pop); } public static void main(String[] args) { //设置Swing窗口视野JAVA风格 new SwingComponent().init(); } }
第12章-Swing编程 --- Swing概述,布布扣,bubuko.com
标签：des style class blog code java
原文地址：http://www.cnblogs.com/xinhuaxuan/p/3784491.html
