Package org.apache.maven.surefire.booter

Class SystemUtils

  • public final class SystemUtils
extends java.lang.Object
    JDK 9 support.
    Since:
    2.20.1
    Author:
    Tibor Digana (tibor17)

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static boolean endsWithJavaPath​(java.lang.String jvmExecPath)  
      static boolean isBuiltInJava9AtLeast()  
      static boolean isJava9AtLeast​(java.lang.String jvmExecutablePath)  
      static boolean isJava9AtLeast​(java.math.BigDecimal version)  
      static java.lang.Long pid()  
      static java.lang.Long pidOf​(java.lang.Process process)
      Returns the OS PID of the given child Process using the Java 9+ Process.pid() method via reflection.
      static java.lang.ClassLoader platformClassLoader()  
      static java.io.File toJdkHomeFromJre()
      If system property java.home is /jdk (since jdk9) or /jdk/jre (prior to jdk9) then the absolute path to JDK home is returned /jdk.
      static java.io.File toJdkHomeFromJvmExec​(java.lang.String jvmExecutable)
      If jvmExecutable is /jdk/bin/java (since jdk9) or /jdk/jre/bin/java (prior to jdk9) then the absolute path to JDK home is returned /jdk.
      static java.math.BigDecimal toJdkVersionFromReleaseFile​(java.io.File jdkHome)  

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • endsWithJavaPath

        public static boolean endsWithJavaPath​(java.lang.String jvmExecPath)
        Parameters:
        jvmExecPath - e.g. /jdk/bin/java, /jdk/jre/bin/java
        Returns:
        true if jvmExecPath is path to java binary executor

      • toJdkHomeFromJvmExec

        public static java.io.File toJdkHomeFromJvmExec​(java.lang.String jvmExecutable)
        If jvmExecutable is /jdk/bin/java (since jdk9) or /jdk/jre/bin/java (prior to jdk9) then the absolute path to JDK home is returned /jdk.
        Null is returned if jvmExecutable is incorrect.
        Parameters:
        jvmExecutable - /jdk/bin/java* or /jdk/jre/bin/java*
        Returns:
        path to jdk directory; or null if wrong path or directory layout of JDK installation

      • toJdkHomeFromJre

        public static java.io.File toJdkHomeFromJre()
        If system property java.home is /jdk (since jdk9) or /jdk/jre (prior to jdk9) then the absolute path to JDK home is returned /jdk.
        Returns:
        path to JDK

      • toJdkVersionFromReleaseFile

        public static java.math.BigDecimal toJdkVersionFromReleaseFile​(java.io.File jdkHome)

      • isJava9AtLeast

        public static boolean isJava9AtLeast​(java.lang.String jvmExecutablePath)

      • isBuiltInJava9AtLeast

        public static boolean isBuiltInJava9AtLeast()

      • isJava9AtLeast

        public static boolean isJava9AtLeast​(java.math.BigDecimal version)

      • platformClassLoader

        public static java.lang.ClassLoader platformClassLoader()

      • pid

        public static java.lang.Long pid()

      • pidOf

        public static java.lang.Long pidOf​(java.lang.Process process)
        Returns the OS PID of the given child Process using the Java 9+ Process.pid() method via reflection.
        Parameters:
        process - a Process returned by ProcessBuilder / Runtime.exec; may be null
        Returns:
        the PID, or null when it cannot be determined (e.g. running on Java 8 or the reflective call fails)
        Since:
        3.6.0