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[java]代码库

import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.*;
import javax.swing.*;
public class JToolBarTest
{
	JFrame jf = new JFrame("测试工具条");
	JTextArea jta = new JTextArea(6, 35);
	JToolBar jtb = new JToolBar();
	JMenuBar jmb = new JMenuBar();
	Clipboard clipboard = Toolkit.getDefaultToolkit()
		.getSystemClipboard();
	Action pasteAction = new AbstractAction("粘贴"
		, new ImageIcon("ico/paste.png"))
	{
		public void actionPerformed(ActionEvent e)
		{
			if (clipboard.isDataFlavorAvailable(DataFlavor.stringFlavor))
			{
				try
				{
					String content = (String)clipboard.getData
					(DataFlavor.stringFlavor);
						jta.replaceRange(content , jta.getSelectionStart()
						, jta.getSelectionEnd());
				}
				catch (Exception ee)
				{
					ee.printStackTrace();
				}
			}
		}
	};
	Action copyAction = new AbstractAction("复制"
		, new ImageIcon("ico/copy.png"))
	{
		public void actionPerformed(ActionEvent e)
		{
			StringSelection contents = new StringSelection(
				jta.getSelectedText());
			clipboard.setContents(contents, null);
			if (clipboard.isDataFlavorAvailable(DataFlavor.stringFlavor))
			{
				pasteAction.setEnabled(true);
			}
		}
	};
	public void init()
	{
		pasteAction.setEnabled(false);   // ①
		jf.add(new JScrollPane(jta));
		JButton copyBn = new JButton(copyAction);
		JButton pasteBn = new JButton(pasteAction);
		JPanel jp = new JPanel();
		jp.add(copyBn);
		jp.add(pasteBn);
		jf.add(jp , BorderLayout.SOUTH);
		jtb.add(copyAction);
		jtb.addSeparator();
		jtb.add(pasteAction);
		edit.add(copyAction);
		edit.add(pasteAction);
		jmb.add(edit);
		jf.setJMenuBar(jmb);
		jtb.setMargin(new Insets(20 ,10 , 5 , 30));    
		jf.add(jtb , BorderLayout.NORTH);
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jf.pack();
		jf.setVisible(true);
	}
	public static void main(String[] args)
	{
		new JToolBarTest().init();
	}
}