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Using Arraylist for xyseries in Jfreechart

 
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So The current method I'm using Jfreechart is to have an arraylist with getters and setters in the chart class and in the user interface class I'm doing this

So I create an object and I set Arraylists to whatever lists I want. Now my question is that is there any way that instead of having a separated arraylist in chart class and setting it using setters I can directly use my Arraylist in chart class so I make my list instance in the chart class and use it there. I tried it but the chart came up as empty.
 
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