JToolBar创建工具条

package com.dhy.swing.test;import java.awt.BorderLayout;import java.awt.Insets;import java.awt.Toolkit;import java.awt.datatransfer.Clipboard;import java.awt.datatransfer.DataFlavor;import java.awt.datatransfer.StringSelection;import java.awt.event.ActionEvent;import javax.swing.AbstractAction;import javax.swing.Action;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JToolBar;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();    JMenu edit=new JMenu("编辑");    //获取系统剪贴板    Clipboard clipboard=Toolkit.getDefaultToolkit().getSystemClipboard();    //创建“粘贴"Action,该Action用于创建菜单项、工具按钮和普通按钮    Action pasteAction=new AbstractAction("粘贴",new ImageIcon("ico/paste.png")){        @Override        public void actionPerformed(ActionEvent e) {            // TODO Auto-generated method stub            //如果剪贴板中包含stringFlavor内容            if(clipboard.isDataFlavorAvailable(DataFlavor.stringFlavor)){                try{                    //取出剪贴板中的stringFlavor内容                    String content=(String)clipboard.getData(DataFlavor.stringFlavor);                    //将选中内容替换成剪贴板中的内容                    jta.replaceRange(content, jta.getSelectionStart(),jta.getSelectionEnd());                }catch(Exception ee){                    ee.printStackTrace();                }            }        }    };    //创建“复制”Action    Action copyAction=new AbstractAction("复制",new ImageIcon("ico/copy.png")){        @Override        public void actionPerformed(ActionEvent e) {            // TODO Auto-generated method stub            StringSelection contents=new StringSelection(jta.getSelectedText());            //将StringSelection对象放入剪贴板中            clipboard.setContents(contents, null);            //如果剪贴板中包含StringFlavor内容            if(clipboard.isDataFlavorAvailable(DataFlavor.stringFlavor)){                //将pasteAction激活                pasteAction.setEnabled(true);            }        }    };    public void init(){        //pasteAction默认处于不激活状态        pasteAction.setEnabled(false);        jf.add(new JScrollPane(jta));        //以Action创建按钮，并将该按钮添加到Panel中        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);        //向工具条中添加Action对象，该对象将会转换成工具按钮        jtb.add(copyAction);        jtb.addSeparator();        jtb.add(pasteAction);        //向菜单中添加Action 对象，该对象将会转换成菜单项        edit.add(copyAction);        edit.add(pasteAction);        //将edit菜单添加到菜单条中        jmb.add(edit);        jf.setJMenuBar(jmb);        //设置工具条与工具按钮之间的页边距        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();    }}