Package org.codelibs.fess.util

Class JvmUtil

java.lang.Object

org.codelibs.fess.util.JvmUtil

public final class JvmUtil
extends Object

Utility class for JVM-related operations. This class provides methods for handling JVM options and version detection.

Method Summary

Modifier and Type	Method	Description
static String[]	filterJvmOptions(String[] values)	Filters JVM options based on the current Java version.
static int	getJavaVersion()	Gets the major version number of the current Java runtime.

Methods inherited from class java.lang.Object

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

Method Details

filterJvmOptions

public static String[] filterJvmOptions(String[] values)

Filters JVM options based on the current Java version. Options can be prefixed with version numbers to specify compatibility. Format: "version:option" or "version-:option" (for version and above).

Parameters:

values - the array of JVM options to filter

Returns:

the filtered array of JVM options applicable to the current Java version

getJavaVersion

public static int getJavaVersion()

Gets the major version number of the current Java runtime. For Java 8 and below, returns the minor version (e.g., 8 for Java 1.8). For Java 9 and above, returns the major version (e.g., 11 for Java 11).

Returns:

the Java version number, defaults to 8 if version cannot be determined