Package net.ssehub.easy.instantiation.core

Class JavaUtilities

java.lang.Object

net.ssehub.easy.instantiation.core.JavaUtilities

public class JavaUtilities
extends java.lang.Object

Common utility functions for Java operations which may be used by several instantiators.

Author:

Sascha El-Sharkawy

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	JDK_PATH
static java.lang.String[]	JRE_CLASS_PATH

Constructor Summary

Constructors

Modifier	Constructor	Description
private	JavaUtilities()	Avoid initialization of utility class.

Method Summary

Modifier and Type	Method	Description
private static java.lang.String	determineJDKDir()	Determines the PATH (root folder) of the installed and most used JDK installation.
private static java.lang.String[]	determineJREClassPath()	Determines the JRE class path.
private static java.lang.String	getCommandOutput(java.lang.String command)	Executes the given command inside the command line and returns the result of the command.
static boolean	isJava9()	Returns whether we are running Java 9.

Methods inherited from class java.lang.Object

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

Field Detail

JDK_PATH

public static final java.lang.String JDK_PATH

JRE_CLASS_PATH

public static final java.lang.String[] JRE_CLASS_PATH

Constructor Detail

JavaUtilities

private JavaUtilities()

Avoid initialization of utility class.

Method Detail

determineJDKDir

private static java.lang.String determineJDKDir()

Determines the PATH (root folder) of the installed and most used JDK installation. This algorithm will try the following things to detect the JDK installation:

1. Find the JDK via the JAVA_HOME system variable
2. Find the JDK via the command where/whereis javac

Returns:

The location of a JDK (top folder) or null if it could not be found.

See Also:

JAVA_HOME system variable, Source of the used algorithm

getCommandOutput

private static java.lang.String getCommandOutput(java.lang.String command)

Executes the given command inside the command line and returns the result of the command. Part of the determineJDKDir() method.

Parameters:

command - A windows or unix command to execute on the command line.

Returns:

The result of the executed command.

See Also:

http://stackoverflow.com/questions/15725601/finding-jdk-path-and-storing-it-as-a-string-in-java

determineJREClassPath

private static java.lang.String[] determineJREClassPath()

Determines the JRE class path.

Returns:

String array containing all libs

isJava9

public static boolean isJava9()

Returns whether we are running Java 9.

Returns:

true for Java 9, false else