Name: jl125535 Date: 12/21/2001


java version "1.4.0-beta3"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta3-b84)
Java HotSpot(TM) Client VM (build 1.4.0-beta3-b84, mixed mode)


URI.getPath() throws NullPointerException if
(1) path has space, and
(2) method invoken in event queue handling thread

I think this worked in 1.4 beta 1, maybe 1.4 beta 2 also.


import java.awt.*;
import java.net.*;

/**
Invoking URI.getPath() on a URI with encoded spaces (%20) in the path
FROM WITHIN THE EVENT PROCESSING THREAD
throws a NullPointerException.

Java 1.4 beta 3. I think this worked in beta 1.

Run code from command line, then move mouse into window to cause error.


Sample trace:


//D/prj/Multivalent/src/multivalent/std/adaptor/pdf % java phelps.UriBoom
from main thread -- works
uri = http://www.sun.com/some/path/with%20space/java.html#%23anyref
scheme = http
path = /some/path/with space/java.html


[move mouse into window]
from event queue thread -- THROWS EXCEPTION
uri = http://www.sun.com/some/path/with%20space/java.html#%23anyref
scheme = http
java.lang.NullPointerException
at sun.nio.cs.ThreadLocalCoders$Cache.forName(ThreadLocalCoders.java:45)

at sun.nio.cs.ThreadLocalCoders.decoderFor(ThreadLocalCoders.java:86)
at java.net.URI.decode(URI.java:2640)
at java.net.URI.getPath(URI.java:1297)
at phelps.UriBoom.showURI(UriBoom.java:21)
at phelps.UriBoom.processEvent(UriBoom.java:12)
at java.awt.Component.dispatchEventImpl(Component.java:3527)
at java.awt.Container.dispatchEventImpl(Container.java:1440)
at java.awt.Window.dispatchEventImpl(Window.java:1568)
at java.awt.Component.dispatchEvent(Component.java:3368)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:448)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:193)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:147)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:141)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:133)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:101)

*/

public class UriBoom extends Frame {
  protected void processEvent(AWTEvent e) {
System.out.println("from event queue thread -- THROWS EXCEPTION");
showURI();
  }


  static void showURI() {
try {
// path without space OK
//URI uri = new URI("http",
                // "www.sun.com",
                // "/some/path/without/space/java.html",
                // "#anyref");

// path with space + getPath() => BOOM
URI uri = new URI("http",
                                  "www.sun.com",
                                  "/some/path/with%20space/java.html",
                                  "anyref");

System.out.println("uri = "+uri);
System.out.println("scheme = "+uri.getScheme()); // ok
System.out.println("path = "+uri.getPath()); // BOOM
System.out.println();

} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}
  }

  public static void main(String[] argv) {
System.out.println("from main thread -- works");
showURI(); // ok
System.out.println();

UriBoom f = new UriBoom();
f.enableEvents(AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK);
f.setBounds(100,100, 200,200);
f.show();
  }
}

(Review ID: 136876)
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