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8185890: Intermittent NPE in JLightweightFrame when updating cursor aceoss multiple graphics devices

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Reviewed-by: azvegint
This commit is contained in:
Prasanta Sadhukhan 2017-08-10 10:46:19 +05:30
parent 53de58f50d
commit 3357f6846c
1 changed files with 10 additions and 1 deletions
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11
jdk/src/java.desktop/share/classes/sun/swing/JLightweightFrame.java
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@ -509,7 +509,16 @@ public final class JLightweightFrame extends LightweightFrame implements RootPan
* and could not be overridden.
*/
private void updateClientCursor() {
Point p = MouseInfo.getPointerInfo().getLocation();
PointerInfo pointerInfo = MouseInfo.getPointerInfo();
if (pointerInfo == null) {
/*
* This can happen when multiple graphics device cannot decide
* which graphics device contains the current mouse position
* or on systems without a mouse
*/
return;
}
Point p = pointerInfo.getLocation();
SwingUtilities.convertPointFromScreen(p, this);
Component target = SwingUtilities.getDeepestComponentAt(this, p.x, p.y);
if (target != null) {