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java.lang.NumberFormatException: Invalid double: "3,32"	at java.lang.StringToReal.invalidReal(StringToReal.java:63)	at java.lang.StringToReal.parseDouble(StringToReal.java:269)	at java.lang.Double.parseDouble(Double.java:295)	at com.example.android.rechner.MainActivityRustZ.displayTimeReal(MainActivityRustZ.java:118)	at com.example.android.rechner.MainActivityRustZ.access$200(MainActivityRustZ.java:12)	at com.example.android.rechner.MainActivityRustZ$1.onClick(MainActivityRustZ.java:29)	at android.view.View.performClick(View.java:4452)	at android.widget.Button.performClick(Button.java:148)	at android.view.View$PerformClick.run(View.java:18428)	at android.os.Handler.handleCallback(Handler.java:725)	at android.os.Handler.dispatchMessage(Handler.java:92)	at android.os.Looper.loop(Looper.java:176)	at android.app.ActivityThread.main(ActivityThread.java:5365)	at java.lang.reflect.Method.invokeNative(Native Method)	at java.lang.reflect.Method.invoke(Method.java:511)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)	at dalvik.system.NativeStart.main(Native Method)