ch9_49.java

60多个javaSwing范例

import javax.swing.*;
import java.awt.event.*;
public class ch9_49 extends JFrame
{
	public ch9_49()
	{
		super("菜单演示");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(20,20,500,300);
		
	}
	public static void main(String [] args)
	{
		ch9_49 f=new ch9_49();
		
		JMenuBar mbar=new JMenuBar();
		JMenu mfile=f.buildFileMenu();
		mbar.add(mfile);
		mbar.setOpaque(true);

		f.setJMenuBar(mbar);
		
		f.setVisible(true);
	}
	public JMenu buildFileMenu()
	{
		JMenu theedit=new JMenu("文件");
		theedit.setIcon(new ImageIcon("cut.gif"));
		//theedit.setMnemonic('F');
		
		JMenuItem newf=new JMenuItem("新建(N)",new ImageIcon("new.gif"));
		JMenuItem open=new JMenuItem("打开(O)",new ImageIcon("open.gif"));
		JMenuItem close=new JMenuItem("关闭(C)",new ImageIcon("paste.gif"));
		JMenuItem quit=new JMenuItem("退出(X)",new ImageIcon("save.gif"));
		
		/*
		改变图标的位置
		*/
		/*
		newf.setHorizontalTextPosition(SwingConstants.LEFT);
		open.setHorizontalTextPosition(SwingConstants.LEFT);
		close.setHorizontalTextPosition(SwingConstants.LEFT);
		quit.setHorizontalTextPosition(SwingConstants.LEFT);
		*/
		//设置快捷键ALT+
		newf.setMnemonic('N');
		open.setMnemonic('O');
		close.setMnemonic('C');
		quit.setMnemonic('X');
		
		//设置快捷键CTRL+
		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('C',java.awt.Event.CTRL_MASK,false));
		quit.setAccelerator(KeyStroke.getKeyStroke('X',java.awt.Event.CTRL_MASK,false));
		
		
		theedit.add(newf);
		theedit.add(open);
		theedit.add(close);
		theedit.addSeparator();
		theedit.add(quit);
		
		return theedit;
	}
}