How to make this code much simpler and shorter, Java

yoonsanha :

I am creating a quiz program using swing components. I want to make a code that I will declare all the designs like background color and I will use it to all the frames I created so my code will be simpler and shorter.

I already tried to declare one by one.

contentPane1.setBackground(Color.PINK);
contentPane2.setBackground(Color.PINK);
contentPane3.setBackground(Color.PINK);
contentPane4.setBackground(Color.PINK);
contentPane5.setBackground(Color.PINK);

I have to create 10 frames, and with that kind of code it will be very long. I don't know how to do it I am just a beginner. Thank you :)

Elliott Frisch :

You could use a Stream of your content pane(s) and invoke setBackground with a forEach like;

Stream.of(contentPane1, contentPane2, contentPane3, contentPane4, contentPane5)
        .forEach(p -> p.setBackground(Color.PINK));

It might be even better (for ten) to use an array; perhaps like

JPanel[] panels = new JPanel[] { contentPane1, contentPane2, contentPane3, 
        contentPane4, contentPane5, contentPane6, contentPane7, 
        contentPane8, contentPane9, contentPane10
};
Arrays.stream(panels).forEach(p -> p.setBackground(Color.PINK));