paint and repaint in Java

Question

I ve spent maybe the last two hours browsing and reading up on these methods and the Graphics class  and maybe I m stupid  haha  but I m just not understanding them  What are they for  I understand that they re supposed redraw or update components on the screen  but I have never understood why this is required  I m new to this   For example  if I m moving a JLabel around the screen  a call to setLocation   moves it just fine  Is that a scenario in which repaint   isn t required  In which scenarios is it useful  and why   Apologies if you feel that this is a question that could be solved using the search function  but for whatever reason I m not getting it

User · Answer

The paint   method supports painting via a Graphics object    The repaint   method is used to cause paint   to be invoked by the AWT painting thread

User · Answer

It s not necessary to call repaint unless you need to render something specific onto a component   Something specific  meaning anything that isn t provided internally by the windowing toolkit you re using

User · Answer

Difference between Paint   and Repaint   method  Paint     This method holds instructions to paint this component  Actually  in Swing  you should change paintComponent   instead of paint    as paint calls paintBorder    paintComponent   and paintChildren    You shouldn t call this method directly  you should call repaint   instead   Repaint     This method can t be overridden  It controls the update   -  paint   cycle  You should call this method to get a component to repaint itself  If you have done anything to change the look of the component  but not its size   like changing color  animating  etc    then call this method

[java] paint() and repaint() in Java

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