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

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rev 10947 : 8055723: Replace concat String to append in StringBuilder parameters

@@ -366,11 +366,11 @@
                                               ti.getBlockedCount(),
                                               ti.getWaitedCount()));
                             sb.append(Messages.STACK_TRACE);
                             int index = 0;
                             for (StackTraceElement e : ti.getStackTrace()) {
-                                sb.append(e.toString()+"\n");
+                                sb.append(e).append('\n');
                                 if (monitors != null) {
                                     for (MonitorInfo mi : monitors) {
                                         if (mi.getLockedStackDepth() == index) {
                                             sb.append(Resources.format(Messages.MONITOR_LOCKED, mi.toString()));
                                         }
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