Java 创建图形用户界面例子集

import java.awt.*; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; import javax.swing.*; import javax.swing.border.*; /*Download by http://www.codefans.net*/ public class BorderDemo extends JFrame implements ActionListener { // Declare a label for displaying message private JLabel jLabel = new JLabel("Display the border type"); // A check box for selecting a border with or without a title private JCheckBox jchkTitled; // Radio buttons for border styles private JRadioButton jrbLoweredBevel, jrbRaisedBevel, jrbEtched, jrbLine, jrbMatte, jrbEmpty; // Radio buttons for titled border options private JRadioButton jrbAboveBottom, jrbBottom, jrbBelowBottom, jrbAboveTop, jrbTop, jrbBelowTop, jrbLeft, jrbCenter, jrbRight; // TitledBorder for the label private TitledBorder labelBorder; /** Constructor */ public BorderDemo() { setTitle("BorderDemo"); // Create a JLabel instance and set colors jLabel.setBackground(Color.yellow); jLabel.setBorder(labelBorder); // Place title position radio buttons JPanel jpPosition = new JPanel(); jpPosition.setLayout(new GridLayout(3, 2)); jpPosition.add(jrbAboveBottom = new JRadioButton("ABOVE_BOTTOM")); jpPosition.add(jrbAboveTop = new JRadioButton("ABOVE_TOP")); jpPosition.add(jrbBottom = new JRadioButton("BOTTOM")); jpPosition.add(jrbTop = new JRadioButton("TOP")); jpPosition.add(jrbBelowBottom = new JRadioButton("BELOW_BOTTOM")); jpPosition.add(jrbBelowTop = new JRadioButton("BELOW_TOP")); jpPosition.setBorder(new TitledBorder("Position")); // Place title justification radio buttons JPanel jpJustification = new JPanel(); jpJustification.setLayout(new GridLayout(3, 1)); jpJustification.add(jrbLeft = new JRadioButton("LEFT")); jpJustification.add(jrbCenter = new JRadioButton("CENTER")); jpJustification.add(jrbRight = new JRadioButton("RIGHT")); jpJustification.setBorder(new TitledBorder("Justification")); // Create panel jpTitleOptions to hold jpPosition and // jpJustification JPanel jpTitleOptions = new JPanel(); jpTitleOptions.setLayout(new BorderLayout()); jpTitleOptions.add(jpPosition, BorderLayout.CENTER); jpTitleOptions.add(jpJustification, BorderLayout.EAST); // Create Panel jpTitle to hold a check box and title position // radio buttons, and title justification radio buttons JPanel jpTitle = new JPanel(); jpTitle.setBorder(new TitledBorder("Border Title")); jpTitle.setLayout(new BorderLayout()); jpTitle.add(jchkTitled = new JCheckBox("Titled"), BorderLayout.NORTH); jpTitle.add(jpTitleOptions, BorderLayout.CENTER); // Group radio buttons for title position ButtonGroup btgTitlePosition = new ButtonGroup(); btgTitlePosition.add(jrbAboveBottom); btgTitlePosition.add(jrbBottom); btgTitlePosition.add(jrbBelowBottom); btgTitlePosition.add(jrbAboveTop); btgTitlePosition.add(jrbTop); btgTitlePosition.add(jrbBelowTop); // Group radio buttons for title justification ButtonGroup btgTitleJustification = new ButtonGroup(); btgTitleJustification.add(jrbLeft); btgTitleJustification.add(jrbCenter); btgTitleJustification.add(jrbRight); // Create Panel jpBorderStyle to hold border style radio buttons JPanel jpBorderStyle = new JPanel(); jpBorderStyle.setBorder(new TitledBorder("Border Style")); jpBorderStyle.setLayout(new GridLayout(6, 1)); jpBorderStyle.add(jrbLoweredBevel = new JRadioButton("Lowered Bevel")); jpBorderStyle.add(jrbRaisedBevel = new JRadioButton("Raised Bevel")); jpBorderStyle.add(jrbEtched = new JRadioButton("Etched")); jpBorderStyle.add(jrbLine = new JRadioButton("Line")); jpBorderStyle.add(jrbMatte = new JRadioButton("Matte")); jpBorderStyle.add(jrbEmpty = new JRadioButton("Empty")); // Group radio buttons for border styles ButtonGroup btgBorderStyle = new ButtonGroup(); btgBorderStyle.add(jrbLoweredBevel); btgBorderStyle.add(jrbRaisedBevel); btgBorderStyle.add(jrbEtched); btgBorderStyle.add(jrbLine); btgBorderStyle.add(jrbMatte); btgBorderStyle.add(jrbEmpty); // Create Panel jpAllChoices to place jpTitle and jpBorderStyle JPanel jpAllChoices = new JPanel(); jpAllChoices.setLayout(new BorderLayout()); jpAllChoices.add(jpTitle, BorderLayout.CENTER); jpAllChoices.add(jpBorderStyle, BorderLayout.EAST); // Place panels in the frame getContentPane().setLayout(new BorderLayout()); getContentPane().add(jLabel, BorderLayout.CENTER); getContentPane().add(jpAllChoices, BorderLayout.SOUTH); // Register listeners jchkTitled.addActionListener(this); jrbAboveBottom.addActionListener(this); jrbBottom.addActionListener(this); jrbBelowBottom.addActionListener(this); jrbAboveTop.addActionListener(this); jrbTop.addActionListener(this); jrbBelowTop.addActionListener(this); jrbLeft.addActionListener(this); jrbCenter.addActionListener(this); jrbRight.addActionListener(this); jrbLoweredBevel.addActionListener(this); jrbRaisedBevel.addActionListener(this); jrbLine.addActionListener(this); jrbEtched.addActionListener(this); jrbMatte.addActionListener(this); jrbEmpty.addActionListener(this); } /** Handle ActionEvents on check box and radio buttons */ public void actionPerformed(ActionEvent e) { // Get border style Border border = new EmptyBorder(2, 2, 2, 2); if (jrbLoweredBevel.isSelected()) { border = new BevelBorder(BevelBorder.LOWERED); jLabel.setText("Lowered Bevel Style"); } else if (jrbRaisedBevel.isSelected()) { border = new BevelBorder(BevelBorder.RAISED); jLabel.setText("Raised Bevel Style"); } else if (jrbEtched.isSelected()) { border = new EtchedBorder(); jLabel.setText("Etched Style"); } else if (jrbLine.isSelected()) { border = new LineBorder(Color.black, 5); jLabel.setText("Line Style"); } else if (jrbMatte.isSelected()) { border = new MatteBorder(15, 15, 15, 15, new ImageIcon( "image/caIcon.gif")); jLabel.setText("Matte Style"); } else if (jrbEmpty.isSelected()) { border = new EmptyBorder(2, 2, 2, 2); jLabel.setText("Empty Style"); } if (jchkTitled.isSelected()) { // Get the title position and justification int titlePosition = TitledBorder.DEFAULT_POSITION; int titleJustification = TitledBorder.DEFAULT_JUSTIFICATION; if (jrbAboveBottom.isSelected()) titlePosition = TitledBorder.ABOVE_BOTTOM; else if (jrbBottom.isSelected()) titlePosition = TitledBorder.BOTTOM; else if (jrbBelowBottom.isSelected()) titlePosition = TitledBorder.BELOW_BOTTOM; else if (jrbAboveTop.isSelected()) titlePosition = TitledBorder.ABOVE_TOP; else if (jrbTop.isSelected()) titlePosition = TitledBorder.TOP; else if (jrbBelowTop.isSelected()) titlePosition = TitledBorder.BELOW_TOP; if (jrbLeft.isSelected()) titleJustification = TitledBorder.LEFT; else if (jrbCenter.