src/java.base/unix/classes/sun/net/sdp/SdpProvider.java

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

@@ -75,11 +75,11 @@
         // check if debugging is enabled
         PrintStream out = null;
         String logfile = props.getProperty("com.sun.sdp.debug");
         if (logfile != null) {
             out = System.out;
-            if (logfile.length() > 0) {
+            if (!logfile.isEmpty()) {
                 try {
                     out = new PrintStream(logfile);
                 } catch (IOException ignore) { }
             }
         }

@@ -165,13 +165,13 @@
                 boolean all = s.equals("*");
                 result[0] = all ? 0 : Integer.parseInt(s);
                 result[1] = all ? MAX_PORT : result[0];
             } else {
                 String low = s.substring(0, pos);
-                if (low.length() == 0) low = "*";
+                if (low.isEmpty()) low = "*";
                 String high = s.substring(pos+1);
-                if (high.length() == 0) high = "*";
+                if (high.isEmpty()) high = "*";
                 result[0] = low.equals("*") ? 0 : Integer.parseInt(low);
                 result[1] = high.equals("*") ? MAX_PORT : Integer.parseInt(high);
             }
             return result;
         } catch (NumberFormatException e) {

@@ -197,11 +197,11 @@
             List<Rule> result = new ArrayList<>();
             while (scanner.hasNextLine()) {
                 String line = scanner.nextLine().trim();
 
                 // skip blank lines and comments
-                if (line.length() == 0 || line.charAt(0) == '#')
+                if (line.isEmpty() || line.charAt(0) == '#')
                     continue;
 
                 // must have 3 fields
                 String[] s = line.split("\\s+");
                 if (s.length != 3) {