src/java.base/share/classes/java/text/MergeCollation.java

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

*** 90,100 ****
          PatternEntry tmp = null;
          ArrayList<PatternEntry> extList = null;
          int i;
          for (i = 0; i < patterns.size(); ++i) {
              PatternEntry entry = patterns.get(i);
!             if (entry.extension.length() != 0) {
                  if (extList == null)
                      extList = new ArrayList<>();
                  extList.add(entry);
              } else {
                  if (extList != null) {
--- 90,100 ----
          PatternEntry tmp = null;
          ArrayList<PatternEntry> extList = null;
          int i;
          for (i = 0; i < patterns.size(); ++i) {
              PatternEntry entry = patterns.get(i);
!             if (!entry.extension.isEmpty()) {
                  if (extList == null)
                      extList = new ArrayList<>();
                  extList.add(entry);
              } else {
                  if (extList != null) {
*** 120,130 ****
      }
  
      private final PatternEntry findLastWithNoExtension(int i) {
          for (--i;i >= 0; --i) {
              PatternEntry entry = patterns.get(i);
!             if (entry.extension.length() == 0) {
                  return entry;
              }
          }
          return null;
      }
--- 120,130 ----
      }
  
      private final PatternEntry findLastWithNoExtension(int i) {
          for (--i;i >= 0; --i) {
              PatternEntry entry = patterns.get(i);
!             if (entry.extension.isEmpty()) {
                  return entry;
              }
          }
          return null;
      }