fix: better java version parsing

Author: nadav3396

src/main/java/io/lumigo/core/SpansContainer.java

@@ -62,9 +62,8 @@ private SpansContainer() {}
     public void init(Map<String, String> env, Reporter reporter, Context context, Object event) {
         this.clear();
         this.reporter = reporter;
-        String javaVersion = System.getProperty("java.version");;
-
-        if (javaVersion.startsWith("17.") || javaVersion.startsWith("21.")) {
+        int javaVersion = AwsUtils.getJavaVersion();
+        if (javaVersion > 11) {
             awsTracerId = System.getProperty("com.amazonaws.xray.traceHeader");
         } else {
             awsTracerId = env.get(AMZN_TRACE_ID);

src/main/java/io/lumigo/core/utils/AwsUtils.java

@@ -243,6 +243,24 @@ public static synchronized Span.READINESS getFunctionReadiness() {
         }
     }
 
+    public static int getJavaVersion() {
+        try {
+            String version = System.getProperty("java.version");
+            if (version.startsWith("1.")) {
+                version = version.substring(2, 3);
+            } else {
+                int dot = version.indexOf(".");
+                if (dot != -1) {
+                    version = version.substring(0, dot);
+                }
+            }
+            return Integer.parseInt(version);
+        } catch (Exception e) {
+            Logger.error("Failed to parse java version", e);
+            return -1;
+        }
+    }
+
     /**
      * This function seeks for the value of className in all the super classes of the given object.
      *