import javax.swing.*;
import java.awt.event.*;public class JMenuItem5 extends JFrame{ JTextArea theArea = null; public JMenuItem5(){
super("JMenuItem5");
theArea = new JTextArea();
theArea.setEditable(false);
getContentPane().add(new JScrollPane(theArea));
JMenuBar MBar = new JMenuBar();
MBar.setOpaque(true);
JMenu mfile = buildFileMenu(); MBar.add(mfile);
setJMenuBar(MBar);
}//end of JMenuItem5() public JMenu buildFileMenu() {
JMenu thefile = new JMenu("File");
thefile.setMnemonic('F'); JMenuItem newf = new JMenuItem("New",new ImageIcon("icons/new24.gif"));
JMenuItem open = new JMenuItem("Open",new ImageIcon("icons/open24.gif"));
JMenuItem close= new JMenuItem("Close",new ImageIcon("icons/close24.gif"));
JMenuItem quit = new JMenuItem("Exit",new ImageIcon("icons/exit24.gif")); newf.setMnemonic('N');
open.setMnemonic('O');
close.setMnemonic('L');
quit.setMnemonic('X');
newf.setAccelerator( KeyStroke.getKeyStroke('N', java.awt.Event.CTRL_MASK, false) );
open.setAccelerator( KeyStroke.getKeyStroke('O', java.awt.Event.CTRL_MASK, false) );
close.setAccelerator( KeyStroke.getKeyStroke('L', java.awt.Event.CTRL_MASK, false) );
quit.setAccelerator( KeyStroke.getKeyStroke('X', java.awt.Event.CTRL_MASK, false) ); newf.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
theArea.append("- MenuItem New Performed -\n");
}}); open.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
theArea.append("- MenuItem Open Performed -\n");
}});
close.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
theArea.append("- MenuItem Close Performed -\n");
}}); quit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}}); thefile.add(newf);
thefile.add(open);
thefile.add(close);
thefile.addSeparator();
thefile.add(quit); return thefile;
}//end of buildFileMenu()
public static void main(String[] args){ JFrame F = new JMenuItem5();
F.setSize(400,200);
F.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});//end of addWindowListener
F.setVisible(true);
} // end of main
}//end of class JMenuItem5
import java.awt.event.*;public class JMenuItem5 extends JFrame{ JTextArea theArea = null; public JMenuItem5(){
super("JMenuItem5");
theArea = new JTextArea();
theArea.setEditable(false);
getContentPane().add(new JScrollPane(theArea));
JMenuBar MBar = new JMenuBar();
MBar.setOpaque(true);
JMenu mfile = buildFileMenu(); MBar.add(mfile);
setJMenuBar(MBar);
}//end of JMenuItem5() public JMenu buildFileMenu() {
JMenu thefile = new JMenu("File");
thefile.setMnemonic('F'); JMenuItem newf = new JMenuItem("New",new ImageIcon("icons/new24.gif"));
JMenuItem open = new JMenuItem("Open",new ImageIcon("icons/open24.gif"));
JMenuItem close= new JMenuItem("Close",new ImageIcon("icons/close24.gif"));
JMenuItem quit = new JMenuItem("Exit",new ImageIcon("icons/exit24.gif")); newf.setMnemonic('N');
open.setMnemonic('O');
close.setMnemonic('L');
quit.setMnemonic('X');
newf.setAccelerator( KeyStroke.getKeyStroke('N', java.awt.Event.CTRL_MASK, false) );
open.setAccelerator( KeyStroke.getKeyStroke('O', java.awt.Event.CTRL_MASK, false) );
close.setAccelerator( KeyStroke.getKeyStroke('L', java.awt.Event.CTRL_MASK, false) );
quit.setAccelerator( KeyStroke.getKeyStroke('X', java.awt.Event.CTRL_MASK, false) ); newf.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
theArea.append("- MenuItem New Performed -\n");
}}); open.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
theArea.append("- MenuItem Open Performed -\n");
}});
close.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
theArea.append("- MenuItem Close Performed -\n");
}}); quit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}}); thefile.add(newf);
thefile.add(open);
thefile.add(close);
thefile.addSeparator();
thefile.add(quit); return thefile;
}//end of buildFileMenu()
public static void main(String[] args){ JFrame F = new JMenuItem5();
F.setSize(400,200);
F.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});//end of addWindowListener
F.setVisible(true);
} // end of main
}//end of class JMenuItem5
public void actionPerformed(ActionEvent e) {
jMenuItem4_actionPerformed(e);
}
});//添加监听器;
void jMenuItem4_actionPerformed(ActionEvent e){
new query();//弹出新窗口;query可以是一个继承了JFrame的类
}//完成的动作