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Question

JToolBar  怎样指定工具条方向 ？
JPanel  怎么传图片？
初学者  希望帮写下代码  非常感谢

Answer 1

都做web方面的东西了  这个真忘记了  帮你顶
！

Answer 2

import   javax.swing.JToolBar; 
import   javax.swing.JButton; 
import   javax.swing.ImageIcon; import   javax.swing.JFrame; 
import   javax.swing.JTextArea; 
import   javax.swing.JScrollPane; 
import   javax.swing.JPanel; import   java.awt.*; 
import   java.awt.event.*; public   class   ToolBarDemo   extends   JFrame   { 
        protected   JTextArea   textArea; 
        protected   String   newline   =   "\n ";         public   ToolBarDemo()   { 
                //Do   frame   stuff. 
                super( "ToolBarDemo "); 
                addWindowListener(new   WindowAdapter()   { 
                        public   void   windowClosing(WindowEvent   e)   { 
                                System.exit(0); 
                        } 
                });                 //Create   the   toolbar. 
                JToolBar   toolBar   =   new   JToolBar(); 
                addButtons(toolBar);                 //Create   the   text   area   used   for   output. 
                textArea   =   new   JTextArea(5,   30); 
                JScrollPane   scrollPane   =   new   JScrollPane(textArea);                 //Lay   out   the   content   pane. 
                JPanel   contentPane   =   new   JPanel(); 
                contentPane.setLayout(new   BorderLayout()); 
                contentPane.setPreferredSize(new   Dimension(400,   100)); 
                contentPane.add(toolBar,   BorderLayout.NORTH); 
                contentPane.add(scrollPane,   BorderLayout.CENTER); 
                setContentPane(contentPane); 
        }         protected   void   addButtons(JToolBar   toolBar)   { 
                JButton   button   =   null;                 //first   button 
                button   =   new   JButton(new   ImageIcon( "images/left.gif ")); 
                button.setToolTipText( "This   is   the   left   button "); 
                button.addActionListener(new   ActionListener()   { 
                        public   void   actionPerformed(ActionEvent   e)   { 
                                displayResult( "Action   for   first   button "); 
                        } 
                }); 
                toolBar.add(button);                 //second   button 
                button   =   new   JButton(new   ImageIcon( "images/middle.gif ")); 
                button.setToolTipText( "This   is   the   middle   button "); 
                button.addActionListener(new   ActionListener()   { 
                        public   void   actionPerformed(ActionEvent   e)   { 
                                displayResult( "Action   for   second   button "); 
                        } 
                }); 
                toolBar.add(button);                 //third   button 
                button   =   new   JButton(new   ImageIcon( "images/right.gif ")); 
                button.setToolTipText( "This   is   the   right   button "); 
                button.addActionListener(new   ActionListener()   { 
                        public   void   actionPerformed(ActionEvent   e)   { 
                                displayResult( "Action   for   third   button "); 
                        } 
                }); 
                toolBar.add(button); 
        }         protected   void   displayResult(String   actionDescription)   { 
                textArea.append(actionDescription   +   newline); 
        }         public   static   void   main(String[]   args)   { 
                ToolBarDemo   frame   =   new   ToolBarDemo(); 
                frame.pack(); 
                frame.setVisible(true); 
        } 
}