Problem with JEditor Pane while resizing the frame_问答_开发者

i am new to java GUI programming. i am adding a JEditor pane (with HTML text ) inside a JScrollPane and added the scroll pane to a JFrame.The problem is when i re size the frame the JEditor pane vanishes.

Any one help me ?

Hi All ,

Following is the code :

here another problem is i set weightx and weighty for the pane .But still the JEditor pane is not resizing when the frame is maximized/mimized

public class GridBagWithJEditorPane extends javax.swing.JFrame {

public GridBagWithJEditorPane() {
    initComponents();
}

private void initComponents() {
    java.awt.GridBagConstraints gridBagConstraints;

    Panel1 = new javax.swing.JPanel();
    Button1 = new javax.swing.JButton();
    Label = new javax.swing.JLabel();
    Panel2 = new javax.swing.JPanel();
    ScrollPane = new javax.swing.JScrollPane();
    EditorPane1 = new javax.swing.JEditorPane();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    getContentPane().setLayout(new java.awt.GridBagLayout());

    Panel1.setLayout(new java.awt.GridBagLayout());

    Button1.setText("Button");
    Panel1.add(Button1, new java.awt.GridBagConstraints());

    Label.setText("Label");
    Panel1.add(Label, new java.awt.GridBagConstraints());

    gridBagConstraints = new java.awt.GridBagConstraints();
    gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
    getContentPane().add(Panel1, gridBagConstraints);

    Panel2.setLayout(new java.awt.GridBagLayout());

    ScrollPane.setVerticalScrollBarPolicy(javax.swing.ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);

    EditorPane1.setContentType("text/html");
    EditorPane1.setText("<html>\r\n  <head>\r\n\r\n  </head>\r\n  <body>\r\n    <p style=\"margin-top: 0\">\r\n      \rHere some html text sakdjslakdjsa dksa dsakjdklsajdklsad klsajd lksad<br>\n      asdka;slkd;laskd;sa dlksa dksa dksald;lsakd;lsakd;l ska;dl sal;dk;salkd<br>\n     asas;alks;laKSL;Kalk ALSKLAks;laSAsLAKS;Lk;slk<br>\t\n    alsdasldk;alskd;laskd;l sadksa;dlksa;ldk;saldk;alsd<br>\n    </p>\r\n  </body>\r\n</html>\r\n");
    EditorPane1.setMinimumSize(new java.awt.Dimension(15, 15));
    EditorPane1.setPreferredSize(new java.awt.Dimension(340, 220));
    ScrollPane.setViewportView(EditorPane1);

    gridBagConstraints = new java.awt.GridBagConstraints();
    gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
    gridBagConstraints.weightx = 1.0;
    gridBagConstraints.weighty = 1.0;
    Panel2.add(ScrollPane, gridBagConstraints);

    gridBagConstraints = new java.awt.GridBagConstraints();
    gridBagConstra开发者_StackOverflow中文版ints.gridx = 0;
    gridBagConstraints.gridy = 1;
    gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
    getContentPane().add(Panel2, gridBagConstraints);

    pack();
}

public static void main(String args[]) {
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new GridBagWithJEditorPane().setVisible(true);
        }
    });
}


private javax.swing.JButton Button1;
private javax.swing.JEditorPane EditorPane1;
private javax.swing.JLabel Label;
private javax.swing.JPanel Panel1;
private javax.swing.JPanel Panel2;
private javax.swing.JScrollPane ScrollPane;

}

Small working example. Show us your code else we won't be able to tell where your problem lies

import javax.swing.*;
public class Test {
  public static void main (String args[]) {
    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        JFrame frame = new JFrame("JScrollPane+JEditorPane");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new JScrollPane(new JEditorPane()));
        frame.pack();
        frame.setVisible(true);
      }
    });
  }
}

The problem is you set weightX/Y values for the scroll pane, but not the panel.

Why are you adding the scroll pane to a panel and then adding the panel to the frame? The panel is unnecessary.

I suggest not using GridBagLayout. There are plenty of more modern layout managers out there (MiGLayout, FormLayout, SpringLayout...), and for that matter you can almost always get what you want just by nesting JPanels with BorderLayouts. This will also make your layout problems much easier to diagnose.

Seriously, I've been programming in Java since 1995 and with Swing since 1998, and I've never bothered to learn GridBagLayout properly. It's just not worth the effort.

solved the problem myself . The solution is same as in

resize problem with JList?