2 files changed, 2 insertions, 2 deletions
diff --git a/src/java/jogamp/android/launcher/ActivityLauncher.java b/src/java/jogamp/android/launcher/ActivityLauncher.java
index 3dc776d..7506803 100644
--- a/src/java/jogamp/android/launcher/ActivityLauncher.java
+++ b/src/java/jogamp/android/launcher/ActivityLauncher.java
@@ -197,7 +197,7 @@ public class ActivityLauncher extends Activity {
     protected static final Class<?>[] zeroTypes = new Class[0];
 
     protected static final String asString(Class<?>[] argTypes) {
-        StringBuffer args = new StringBuffer();
+        StringBuilder args = new StringBuilder();
         boolean coma = false;
         if(null != argTypes) {
             for (int i = 0; i < argTypes.length; i++) {
diff --git a/src/java/jogamp/common/util/locks/RecursiveThreadGroupLockImpl01Unfairish.java b/src/java/jogamp/common/util/locks/RecursiveThreadGroupLockImpl01Unfairish.java
index 561ac61..695c9c3 100644
--- a/src/java/jogamp/common/util/locks/RecursiveThreadGroupLockImpl01Unfairish.java
+++ b/src/java/jogamp/common/util/locks/RecursiveThreadGroupLockImpl01Unfairish.java
@@ -116,7 +116,7 @@ public class RecursiveThreadGroupLockImpl01Unfairish
         }
         
         String addOwnerToString() {
-            StringBuffer sb = new StringBuffer();
+            StringBuilder sb = new StringBuilder();
             for(int i=0; i<threadNum; i++) {
                 if(i>0) {
                     sb.append(", ");