static {
// http://www.oracle.com/technetwork/java/javase/versioning-naming-139433.html
// http://openjdk.java.net/jeps/223 "New Version-String Scheme"
+ // TODO: Use java.lang.Runtime class (since Java 9, now AspectJ needs Java 11+ due to JDT Core anyway)
+ final String JAVA_VERSION_NOT_FOUND = "System properties appear damaged, cannot find: java.version/java.runtime.version/java.vm.version";
try {
String vm = System.getProperty("java.version"); // JLS 20.18.7
if (vm == null) {
vm = System.getProperty("java.vm.version");
}
if (vm == null) {
- new RuntimeException(
- "System properties appear damaged, cannot find: java.version/java.runtime.version/java.vm.version")
- .printStackTrace(System.err);
+ new RuntimeException(JAVA_VERSION_NOT_FOUND).printStackTrace(System.err);
vmVersion = 1.5;
} else {
- // Version: [1-9][0-9]*((\.0)*\.[1-9][0-9]*)*
// Care about the first set of digits and second set if first digit is 1
try {
- List<Integer> numbers = getFirstNumbers(vm);
+ List<Integer> numbers = getJavaMajorMinor(vm);
if (numbers.get(0) == 1) {
// Old school for 1.0 > 1.8
vmVersion = numbers.get(0)+(numbers.get(1)/10d);
}
}
} catch (Throwable t) {
- new RuntimeException(
- "System properties appear damaged, cannot find: java.version/java.runtime.version/java.vm.version", t)
- .printStackTrace(System.err);
+ new RuntimeException(JAVA_VERSION_NOT_FOUND, t).printStackTrace(System.err);
vmVersion = 1.5;
}
}
- private static List<Integer> getFirstNumbers(String vm) {
+ private static List<Integer> getJavaMajorMinor(String vm) {
List<Integer> result = new ArrayList<>();
- StringTokenizer st = new StringTokenizer(vm,".-_");
+ // Can be something like '1.5', '11.0.16.1', '19+36-2238'
+ StringTokenizer st = new StringTokenizer(vm,".-_+");
try {
result.add(Integer.parseInt(st.nextToken()));
+ // FIXME: The minor will be wrong for version strings like '19+36-2238'.
+ // The minor is only relevant for Java <= 1.8. Even so, this is super ugly.
result.add(Integer.parseInt(st.nextToken()));
} catch (Exception e) {
// NoSuchElementException if no more tokens