Bug GUI problems

Constantly i experience two problems:

1. When resizing the runmate window while in developer mode i get this weird stuff:

Code (Text):

1. java.lang.OutOfMemoryError
2. java.lang.OutOfMemoryError
3.     at sun.misc.Unsafe.allocateMemory(Native Method)
4.     at java.nio.DirectByteBuffer.<init>(Unknown Source)
5.     at java.nio.ByteBuffer.allocateDirect(Unknown Source)
6.     at com.sun.prism.impl.BufferUtil.newByteBuffer(BufferUtil.java:90)
7.     at com.sun.prism.impl.BufferUtil.newIntBuffer(BufferUtil.java:121)
8.     at com.sun.prism.impl.QueuedPixelSource.getUnusedPixels(QueuedPixelSource.java:153)
9.     at com.sun.javafx.tk.quantum.UploadingPainter.run(UploadingPainter.java:147)
10.     at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
11.     at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
12.     at com.sun.javafx.tk.RenderJob.run(RenderJob.java:58)
13.     at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
14.     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
15.     at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:125)
16.     at java.lang.Thread.run(Unknown Source)

this occurs when my system has about 8Gb of ram left.

2. Why does it happen that bots GUI showing statistics(exp/hr etc...) gets often polluted with random data/negative values, this happens often with many different bots its not problem of one bot per se.

 

yeah that doesn't say much, what are the technical details surround this problem?

lets image we have something like:

Code (Text):

1.    
2. public void onExperienceGained(SkillEvent event) {
3.         if (event.getSkill() == Skill.STRENGTH){
4.             GUIcontroller.strengthXP = Skill.STRENGTH.getExperienceAsPercent();
5.             GUIcontroller.strengthXPgained = GUIcontroller.strengthXPgained + event.getChange();
6.  
7.             Platform.runLater(() -> GUIcontroller.strengthBar.setProgress(GUIcontroller.strengthXP/100.0));
8.             Platform.runLater(() -> GUIcontroller.strengthPercent.setText(GUIcontroller.strengthXP + "%"));
9.         }
10.  

so how does the variable GUIcontroller.strengthXPgained gets polluted with random data so easily? Is this some kind of thread separation problem or wtf is going on here? Sometimes it happens on initialization otherwise it just happens randomly.

I don't know java even less so javaFX so just asking as its quite annoting.