JAVA程式測試之Swing編程

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package swingtest;import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class HelloApp extends JFrame{        public static void main(String [] args)    {                SwingUtilities.invokeLater(new Runnable(){            public void run(){                HelloApp inst = new HelloApp();                inst.setLocationRelativeTo(null);                inst.setVisible(true);            }        }                );            }    public HelloApp()    {        super();        initGUI();    }        private void initGUI()    {        try        {            setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);            JMenuBar mbar = new JMenuBar();            setJMenuBar(mbar);            JMenu mfile = new JMenu();            mbar.add(mfile);            mfile.setText("File");            JMenuItem showHello = new JMenuItem();            mfile.add(showHello);            showHello.setText("Hello");                        showHello.addActionListener(new ActionListener(){                public void actionPerformed(ActionEvent e)                {                    JOptionPane.showMessageDialog(null,"Hello World","This is a message dialog",JOptionPane.DEFAULT_OPTION);                }            }            );                        JMenuItem exitem = new JMenuItem();            mfile.add(exitem);            exitem.setText("Exit");                        pack();            setSize(400,300);                        JToolBar toolBar = new JToolBar();            getContentPane().add(toolBar,BorderLayout.SOUTH);            JButton bInBar = new JButton();            toolBar.add(bInBar);            bInBar.setText("Say Hello");                        JTextField textf = new JTextField();            getContentPane().add(textf,BorderLayout.NORTH);            textf.setText("Please input the text");                                                    }        catch (Exception e)        {            e.printStackTrace();        }    }    }

 

JAVA程式測試之Swing編程