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Yes Greg! I got it now!
What I did is the following:

jTextArea.setText(myArrayList.toString());

Works like a charm :)>-

Thank you!

Class objects
ArrayList<MyClass> = new ArrayList();

Hello,

I want to display my ArrayList in the text area like this:

jTextArea.setText(myArrayList);

But it gives me an error, because it can only set Strings, and my ArrayList is not a String....