From ac1ed908de999523efc36f38e69bca1aadfe0808 Mon Sep 17 00:00:00 2001 From: Mark Wielaard Date: Mon, 14 Aug 2006 23:12:35 +0000 Subject: Imported GNU Classpath 0.92 2006-08-14 Mark Wielaard Imported GNU Classpath 0.92 * HACKING: Add more importing hints. Update automake version requirement. * configure.ac (gconf-peer): New enable AC argument. Add --disable-gconf-peer and --enable-default-preferences-peer to classpath configure when gconf is disabled. * scripts/makemake.tcl: Set gnu/java/util/prefs/gconf and gnu/java/awt/dnd/peer/gtk to bc. Classify gnu/java/security/Configuration.java as generated source file. * gnu/java/lang/management/VMGarbageCollectorMXBeanImpl.java, gnu/java/lang/management/VMMemoryPoolMXBeanImpl.java, gnu/java/lang/management/VMClassLoadingMXBeanImpl.java, gnu/java/lang/management/VMRuntimeMXBeanImpl.java, gnu/java/lang/management/VMMemoryManagerMXBeanImpl.java, gnu/java/lang/management/VMThreadMXBeanImpl.java, gnu/java/lang/management/VMMemoryMXBeanImpl.java, gnu/java/lang/management/VMCompilationMXBeanImpl.java: New VM stub classes. * java/lang/management/VMManagementFactory.java: Likewise. * java/net/VMURLConnection.java: Likewise. * gnu/java/nio/VMChannel.java: Likewise. * java/lang/Thread.java (getState): Add stub implementation. * java/lang/Class.java (isEnum): Likewise. * java/lang/Class.h (isEnum): Likewise. * gnu/awt/xlib/XToolkit.java (getClasspathTextLayoutPeer): Removed. * javax/naming/spi/NamingManager.java: New override for StackWalker functionality. * configure, sources.am, Makefile.in, gcj/Makefile.in, include/Makefile.in, testsuite/Makefile.in: Regenerated. From-SVN: r116139 --- libjava/classpath/java/lang/System.java | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'libjava/classpath/java/lang/System.java') diff --git a/libjava/classpath/java/lang/System.java b/libjava/classpath/java/lang/System.java index b538b795b95..19278aa32cd 100644 --- a/libjava/classpath/java/lang/System.java +++ b/libjava/classpath/java/lang/System.java @@ -222,6 +222,36 @@ public final class System return VMSystem.currentTimeMillis(); } + /** + *

+ * Returns the current value of a nanosecond-precise system timer. + * The value of the timer is an offset relative to some arbitrary fixed + * time, which may be in the future (making the value negative). This + * method is useful for timing events where nanosecond precision is + * required. This is achieved by calling this method before and after the + * event, and taking the difference betweent the two times: + *

+ *

+ * long startTime = System.nanoTime();
+ * ... event code ...
+ * long endTime = System.nanoTime();
+ * long duration = endTime - startTime;
+ *

+ *

+ * Note that the value is only nanosecond-precise, and not accurate; there + * is no guarantee that the difference between two values is really a + * nanosecond. Also, the value is prone to overflow if the offset + * exceeds 2^63. + *

+ * + * @return the time of a system timer in nanoseconds. + * @since 1.5 + */ + public static long nanoTime() + { + return VMSystem.nanoTime(); + } + /** * Copy one array onto another from src[srcStart] ... * src[srcStart+len-1] to dest[destStart] ... @@ -319,6 +349,7 @@ public final class System *
gnu.java.io.encoding_scheme_alias.iso-latin-_?
8859_?
*
gnu.java.io.encoding_scheme_alias.latin?
8859_?
*
gnu.java.io.encoding_scheme_alias.utf-8
UTF8
+ *
gnu.javax.print.server
Hostname of external CUPS server.
* * * @return the system properties, will never be null -- cgit v1.2.3