@Override
	public String toString() {
		return
			"OS name:              " + _osName + "\n" +
			"OS version:           " + _osVersion + "\n" +
			"OS architecture:      " + _osArch + "\n" +
			"Java version:         " + _javaVersion + "\n" +
			"Java runtime name:    " + _javaRuntimeName + "\n" +
			"Java runtime version: " + _javaRuntimeName + "\n" +
			"VM name:              " + _javaVMName + "\n" +
			"VM version:           " + _javaVMVersion;
	}
Return the Java VM version.

@return the Java VM version
jenetics.tool/src/main/java/io/jenetics/tool/trial/Env.java