java布局

springbird 2010-04-13 12:38:01

我做了一个界面，上面是菜单栏，接着是工具栏showPanel，接下来是左(actionalPanel)右(contentPanel)面板，左右面板中间用分隔线(jsplit)隔开，
可是在加到界面上时却不成功显示，我的代码如下：



private void init(){

    	   	

    	//初始化菜单

    	open.addActionListener(new Act_OpenFile());

    	exit.addActionListener(new Act_Exit());

    	

    	//funOntology.addActionListener(new Act_FunOnto());

    	funOntology.addActionListener(new Act_fun());

    	devOntology.addActionListener(new Act_devOnto());

    	wayOfAch.addActionListener(new Act_WayOfAch());

    	funTree.addActionListener(new Act_FunTree());

    	showHelp.addActionListener(new Act_Help());

    	

    	mb.add(m1);

	     

	    m1.add(open);

	    m1.add(exit);

			

	    m2.add(funOntology);

	    m2.add(devOntology);

	    m2.add(wayOfAch);			

	    m2.add(funTree);

	    

	    m3.add(showHelp);

			

	    mb.add(m2);	     

	    mb.add(m3);

	     

	    setJMenuBar(mb);

	    

	    button1   =   new   JButton( "pre "); 

		button2   =   new   JButton( "next "); 

		button3   =   new   JButton( "end "); 

		toolBar.add(button1); 

		toolBar.add(button2); 

		toolBar.add(button3); 

		toolBar.add(toolTip);

		toolBar.setFloatable(true); 

		

		showPanel.setLayout(new FlowLayout(FlowLayout.LEFT)); 

		showPanel.add(toolBar); 

		

    	

    	root=new DefaultMutableTreeNode("System"); 

        red=new DefaultMutableTreeNode("function"); 

        blue=new DefaultMutableTreeNode("way"); 

        green=new DefaultMutableTreeNode("entity"); 

        

        jtree1=new JTree(root);

        root.add(red); 

        root.add(blue); 

        root.add(green);

    	

                

        actionPanel.setPreferredSize(new Dimension(200, 380));

        actionPanel.setLayout(new BorderLayout());

        actionPanel.add(new JScrollPane(jtree1));

        

      	    

	    this.getContentPane().setLayout(new BorderLayout());

	    

	    this.getContentPane().add(showPanel,BorderLayout.NORTH);

	    

	    	    

	    this.getContentPane().add("West",actionPanel);

	    

	    

	    jsplit=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,true,actionPanel,contentPanel);

        	    jsplit.setOneTouchExpandable(true); 

	    jsplit.setMinimumSize(new Dimension(100,50));

	    this.getContentPane().add(jsplit);

	    this.getContentPane().add("East",contentPanel);