org.apache.poi.util

Class JvmBugs

java.lang.Object

org.apache.poi.util.JvmBugs

public class JvmBugs
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
JvmBugs()

Method Summary

Modifier and Type	Method and Description
static boolean	hasLineBreakMeasurerBug() The LineBreakMeasurer is used for calculating text bounds.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JvmBugs

public JvmBugs()

Method Detail

hasLineBreakMeasurerBug

public static boolean hasLineBreakMeasurerBug()

The LineBreakMeasurer is used for calculating text bounds. The last official JDK 6 version (1.6.0_45) and also JDK 7 (1.7.0_21) for Windows are affected. For JDK 7 - update to a more recent version. For JDK 6 - replace the fontmanager.dll with the previous release. For performance reasons, this method only checks for a windows jvm with version 1.6.0_45 and 1.7.0_21. Set system property "org.apache.poi.JvmBugs.LineBreakMeasurer.ignore" to "true" to bypass this check and use the normal fonts.

Returns:

true, if jvm is bugged, caller code should use Lucida Sans instead of Calibri and Lucida Bright instead of Cambria

See Also:

Workaround for XSLF, Workaround for XSSF and HSSF, POI Bug #54904, JDK Bug #6501991, LineBreakMeasurerTest