java Swing 加入一个滚动条后不出东西了，为什么

swinganzhuang 2010-11-30 10:05:27

为什么我的hello content不显示了



public class Loading extends JDialog{

	private static final long serialVersionUID = 1L;

	

	private JPanel textPanel;

	private JPanel inButPanel;

	private JTextArea jtaTitle;

	private JScrollPane jspContent;

	private JTextArea jtaContent;

	private JButton jbtPre;

	private JButton jbtNext;

	private JButton jbtSave;

	private String titleNum="(1) ";

	public Loading(JFrame jf){

		super(jf,true);

		setBounds(400,100,400,600);

		setLayout(new BorderLayout());

		

		textPanel=new JPanel();

		textPanel.setLayout(null);

		

		jtaTitle=new JTextArea("hello title");

		jtaTitle.setLineWrap(true);

		jtaTitle.setEditable(false);

		jtaTitle.setText(titleNum+jtaTitle.getText());

		jtaTitle.setBounds(0,0,400,60);

		jtaTitle.setFont(new Font("Arial",Font.PLAIN,14));

		textPanel.add(jtaTitle,BorderLayout.NORTH);



		jtaContent=new JTextArea();

		jtaContent.setText("hell content");

		jspContent=new JScrollPane();

		jspContent.setBounds(0,60,390,470);

		jspContent.add(jtaContent);

		textPanel.add(jspContent);

		

		inButPanel=new JPanel();

		jbtPre=new JButton("上一篇");

		jbtNext=new JButton("下一篇");

		jbtSave=new JButton("保存");

		inButPanel.add(jbtPre);

		inButPanel.add(jbtNext);

		inButPanel.add(jbtSave);

		inButPanel.setBounds(0,530,400,70);

		textPanel.add(inButPanel,BorderLayout.SOUTH);

		

		add(textPanel,BorderLayout.CENTER);

		setTitle("段落验证");

		setVisible(true);

		setBackground(new Color(Integer.decode("#f5f6f0")));

	}

	

	public static void main(String[] args) {

		new Loading(null);

	}

}

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swinganzhuang 2010-11-30

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谢谢，哦知道了

sunyiz 2010-11-30

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或者直接这样

        jtaContent=new JTextArea();

        jtaContent.setText("hell content");

        jspContent=new JScrollPane(jtaContent);

        jspContent.setBounds(0,60,390,470);

        //jspContent.add(jtaContent);new的时候直接以文本框为基础生成，不需要再往上加

        textPanel.add(jspContent);