Smaller improvements

Author: dizzzz

exist-start/src/main/java/org/exist/start/Classpath.java

@@ -64,7 +64,7 @@ public Classpath(final String initial)
     }
 
     public boolean addComponent(final String component) {
-        if (component != null && component.length() > 0) {
+        if (component != null && !component.isEmpty()) {
             try {
                 final Path p = Paths.get(component);
                 if (Files.exists(p))

exist-start/src/main/java/org/exist/start/Main.java

@@ -290,10 +290,8 @@ private Optional<String> getFromSysPropOrEnv(final String sysPropName, final Str
         Optional<String> value = Optional.ofNullable(System.getProperty(sysPropName));
         if (!value.isPresent()) {
             value = Optional.ofNullable(System.getenv().get(envVarName));
-            if (value.isPresent()) {
-                // if we managed to detect from environment, store it in a system property
-                System.setProperty(sysPropName, value.get());
-            }
+            // if we managed to detect from environment, store it in a system property
+            value.ifPresent(s -> System.setProperty(sysPropName, s));
         }
 
         if (_debug && value.isPresent()) {