JDK-7026051 : appletviewer cannot show swing components
- Type: Bug
- Component: tools
- Sub-Component: appletviewer
- Affected Version: 7
- Priority: P4
- Status: Closed
- Resolution: Not an Issue
- OS: generic
- CPU: generic
- Submitted: 2011-03-09
- Updated: 2011-03-10
- Resolved: 2011-03-10
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| JDK 7 |
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7Resolved  |
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Description
SYNOPSIS
--------
appletviewer cannot show swing components
OPERATING SYSTEMS
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Redhat Enterprise Linux 6
Windows XP
FULL JDK VERSION
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java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b132)
Java HotSpot(TM) Client VM (build 21.0-b03, mixed mode)
DESCRIPTION
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This is not reproducible when the applet is run in the browser.
This is reproducible using appletviewer.
This looks very similar to CR 7002612, which was closed as a duplicate of CR 6986229. However, issue can reproduce this issue on 7-b132 despite the fix for 6986229 being delivered in b123.
Appletviewer cannot show its inner components just after starting. When I resize the appletviewer's window, I can see the inner components correctly. A similar AWT sample didn't have the problem.
Adding invalidate() at the end of the init() method in the testcase works around issue.
--- swing.html ---
<html>
<body>
<applet code="swing.class" height=300 width=300>
</applet>
</body>
</html>
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--- swing.java ---
import java.awt.*;
import javax.swing.*;
import java.applet.Applet;
public class swing extends JApplet {
public void init(){
Container c = this.getContentPane();
c.setLayout(new BorderLayout());
JScrollPane scrollPane = new JScrollPane();
scrollPane.getViewport().add(new JTextArea());
c.add("Center",scrollPane);
c.add("South",new JTextField());
// workaround
// invalidate () ;
}
}
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REPRODUCTION INSTRUCTIONS
-------------------------
Compile the sample code and load html by appletviewer. Note that the appletviewer doesn't show inner components. It shows grey background.
WORKAROUND
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See testcase (add invalidate()).
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