JToolBar创建工具条

灰太狼 2022-07-14 06:09 111阅读 0赞

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();
        }
    }

![这里写图片描述][20161129214733319]

[20161129214733319]: /images/20220714/2cee4397e86c467c888642698263c794.png