Top "Jpanel" questions

Java Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

OK what I am trying to do here is create a game where the object/ball is controlled by clicking …

java swing nullpointerexception jpanel paintcomponent

What is the relation between ContentPane and JPanel?

I found one example in which buttons are added to panels (instances of JPanel) then panels are added to the …

java swing user-interface jframe jpanel

addKeyListener() doesn't work for JPanel

I am trying to make a game engine. I have made the Game class but the error resides in the …

java swing jpanel keylistener

Java: vertical alignment within JPanel

I am trying to vertically align (center) both JLabels inside one JPanel. JPanel panel = new JPanel(); panel.setPreferredSize(size); JLabel …

java swing alignment jpanel jlabel

Drawing an Image to a JPanel within a JFrame

I am designing a program that contains two JPanels within a JFrame, one is for holding an image, the other …

java image swing jframe jpanel

Java - set opacity in JPanel

Let's say I want to make the opacity of a JPanel %20 viewable? I don't mean setOpaque (draw or not draw) …

java jpanel opacity

How do you add Background Image in JPanel (NetBeans GUI Builder)

I have JTabbedPane with five tabs and each have Jpanel i want add different images for each panel in NetBeans …

java swing netbeans jpanel jtabbedpane

How to make JLabels start on the next line

JPanel pMeasure = new JPanel(); .... JLabel economy = new JLabel("Economy"); JLabel regularity = new JLabel("Regularity"); pMeasure.add(economy); pMeasure.add(regularity); ... …

java swing jpanel jlabel layout-manager

How to repaint a JPanel after have drawn on it?

I have a component that inherits from JPanel, I draw a grid on it. Now I have a JComboBox and …

java swing jpanel

How to fit Image size to JFrame Size?

I have a JPanel into a JFrame. I loaded a picture on the JPanel but its shown just a part …

java image swing jframe jpanel