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src/jdk.jconsole/share/classes/sun/tools/jconsole/ThreadTab.java

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rev 52881 : 8214971: Replace use of string.equals("") with isEmpty()

@@ -663,11 +663,11 @@
                 promptRemoved = true;
             }
         }
 
         public void focusLost(FocusEvent e) {
-            if (promptRemoved && getText().equals("")) {
+            if (promptRemoved && getText().isEmpty()) {
                 setText(prompt);
                 setForeground(Color.gray);
                 promptRemoved = false;
             }
         }
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