paintcomponent

How to draw in JPanel? (Swing/graphics Java)

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Note the extra comments. import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.border.*; class JavaPaintUI extends JFrame { private int tool = 1; int currentX, currentY, oldX, oldY; public JavaPaintUI() { initComponents(); } private void initComponents() { // we want a custom Panel2, not a generic JPanel! jPanel2 = new Panel2(); jPanel2.setBackground(new java.awt.Color(255, 255, 255)); jPanel2.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED)); … Read more

the images are not loading

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I’m sorry to say this, but there are simply so many things wrong with your code… Lets start with: DON’T override any of the paint methods of a top level container. To start with, none of the top level containers are double buffered. Use light weight components instead of heavy weight components (use JFrame instead … Read more

Stretch a JLabel text

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In the approach shown below, the desired text is imaged using TextLayout using a suitably large Font size and scaled to fill the component. There’s a related example here. import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Font; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import java.awt.RenderingHints; import java.awt.font.FontRenderContext; import java.awt.font.TextLayout; import java.awt.image.BufferedImage; import javax.swing.JFrame; import javax.swing.JLabel; /** @see … Read more

Drawing Multiple JComponents to a Frame

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What you want to do is use a data structure of Car objects and loop through them in the paintComonent method. Something like List<Car> cars = new ArrayList<>(); …. @Override protected void paintComponent(Graphics g) { super.paintComponent(g); for (Car car : cars) { car.drawCar(g); } } The drawCar method would come from your Car class public … Read more

How does paintComponent work?

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The (very) short answer to your question is that paintComponent is called “when it needs to be.” Sometimes it’s easier to think of the Java Swing GUI system as a “black-box,” where much of the internals are handled without too much visibility. There are a number of factors that determine when a component needs to … Read more

Difference between paint, paintComponent and paintComponents in Swing

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AWT, override paint(). Swing top-level container (e.g.s are JFrame, JWindow, JDialog, JApplet ..), override paint(). But there are a number of good reasons not to paint in a TLC. A subject for a separate question, perhaps. The rest of Swing (any component that derives from JComponent), override paintComponent(). Neither override nor explicitly call paintComponents(), leave … Read more

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