Name: rk38400 Date: 04/16/98


JTextPane is not working with a large file inside
the pane. If you run this program and feed it a
large file, like Character.java from the jdk sources,
on the command line:
  java FilePane Character.java
and then click inside the text pane, it does
bad things:
  - the background color is wrong
  - the text is garbled visually

Note: this is a bitter disappointment to me
because I've been struggling for a long time with
the AWT TextArea and its limit of 32K on the size
of the contents of a TextArea. I thought this
would be fixed with Swing. Looks like it isn't,
yet. Here's the program source:

import com.sun.java.swing.*;
import com.sun.java.swing.text.*;
import java.awt.*;
import java.io.*;

class FilePane extends JFrame {
  
  public static void main (String [] argv) {
    // SystemLAF.setSystemLAF();
    String fileName = (argv.length > 0) ? argv[0] : "FilePane.java";
    new FilePane(fileName);
  }

  FilePane (String fileName) {
    byte [] contents = null;
    setName(fileName);
    setSize(600, 500);
    try {
      FileInputStream FIS = new FileInputStream(fileName);
      BufferedInputStream BS = new BufferedInputStream(FIS);
      int siz = BS.available();
      contents = new byte[siz];
      int nread = BS.read(contents, 0, siz);
      System.out.println("nread=" + nread);
    } catch (Exception e) {
      e.printStackTrace();
      return;
    }

    JTextPane textPane = new JTextPane();
    textPane.setText(new String(contents));
    JScrollPane scroller = new JScrollPane(textPane,
ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    JPanel panel = new JPanel();
    panel.setLayout(new BorderLayout());
    panel.add(scroller, BorderLayout.CENTER);
    getContentPane().add(panel);
    setVisible(true);
  }
}
(Review ID: 28307)
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