JvmBugs (POI API Documentation)

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org.apache.poi.util
Class JvmBugs

java.lang.Object
  org.apache.poi.util.JvmBugs

public class JvmBugs
extends java.lang.Object
extends java.lang.Object

Constructor Summary
`JvmBugs()`

Method Summary
`static boolean`	`hasLineBreakMeasurerBug()` The LineBreakMeasurer is used for calculating text bounds.

Methods inherited from class java.lang.Object
`clone, equals, finalize, 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 (1.6.0_43). 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, JDK Bug #8013716, LineBreakMeasurerTest