How to wipe a JPanel?
JPanel panel = new JPanel(); //remove all components in panel. panel. removeAll();
What does JFrame repaint do?
repaint() will repaint itself and its children. JFrame. repaint() will repaint itself and its children. But since JFrame is the base, this will repaint every component within.
What is the difference between the paint () and repaint () methods?
The paint() method contains instructions for painting the specific component. The repaint() method, which can’t be overridden, is more specific: it controls the update() to paint() process. You should call this method if you want a component to repaint itself or to change its look (but not the size).
What method does repaint () call?
The repaint() method belongs to Component class that lies into java. awt package. This method is used to call the update() method internally that calls the paint() method to repaint the component.
What is the difference between the Paintcomponent and repaint methods?
What is difference between paint and repaint in Java Swing? The paint() method contains instructions for painting the specific component. The repaint() method, which can’t be overridden, is more specific: it controls the update() to paint() process.
Why are swings not thread safe?
Most Swing object methods are not “thread safe”. This means that if those (non thread safe) method are invoked from multiple threads this could result in thread interference or memory consistency errors. Only thread safe methods can be safely invoked from any thread.
What is event dispatcher thread EDT in Swing?
The event dispatching thread (EDT) is a background thread used in Java to process events from the Abstract Window Toolkit (AWT) graphical user interface event queue.
What is setignorerepaint in Java 2?
2 setIgnoreRepaint(boolean value)is for something completely different. The Java Doc says: Sets whether or not paint messages received from the operating system should be ignored. This does not affect paint events generated in software by the AWT, unless they are an immediate response to an OS-level paint message.
What is setignorerepaint (Boolean value)?
1 2 setIgnoreRepaint(boolean value)is for something completely different. The Java Doc says: Sets whether or not paint messages received from the operating system should be ignored. This does not affect paint events generated in software by the AWT, unless they are an immediate response to an OS-level paint message.
What does setignorerepaint do?
setIgnoreRepaint(boolean value)is for something completely different. The Java Doc says: Sets whether or not paint messages received from the operating system should be ignored. This does not affect paint events generated in software by the AWT, unless they are an immediate response to an OS-level paint message.
Is there a way to override the paint method?
you could try by using setIgnoreRepaint(boolean value)but it’s a typical swing feature that can or cannot work (mainly because it depends from AWT so you never know). Otherwise you could override the paintmethod by using a flag that simply makes the methor return without calling super.paint().