src/java.base/share/classes/java/util/regex/Pattern.java

rev 52979 : 8215281: Use String.isEmpty() when applicable in java.base
Reviewed-by: TBD

@@ -1388,11 +1388,11 @@
         capturingGroupCount = 1;
         localCount = 0;
         localTCNCount = 0;
 
         // if length > 0, the Pattern is lazily compiled
-        if (pattern.length() == 0) {
+        if (pattern.isEmpty()) {
             root = new Start(lastAccept);
             matchRoot = lastAccept;
             compiled = true;
         }
     }

@@ -1421,11 +1421,11 @@
         // Reset group index count
         capturingGroupCount = 1;
         localCount = 0;
         localTCNCount = 0;
 
-        if (pattern.length() > 0) {
+        if (!pattern.isEmpty()) {
             compile();
         } else {
             root = new Start(lastAccept);
             matchRoot = lastAccept;
         }