No, storing a Graphics object is usually a bad idea. 🙂 Here’s why: Normally, Graphics instances are short-lived and is used to paint or draw onto some kind of surface (typically a (J)Component or a BufferedImage). It holds the state of these drawing operations, like colors, stroke, scale, rotation etc. However, it does not hold … Read more
g.setFont(new Font(“TimesRoman”, Font.PLAIN, fontSize)); Where fontSize is a int. The API for drawString states that the x and y parameters are coordinates, and have nothing to do with the size of the text.
As other answers have said, it executes your Runnable on the AWT event-dispatching thread. But why would you want to do that? Because the Swing data structures aren’t thread-safe, so to provide programmers with an easily-achievable way of preventing concurrent access to them, the Swing designers laid down the rule that all code that accesses … Read more
Well I had the same exact requirement, and Robot class is perfectly fine for me. It works on windows 7 and XP (tried java 6 & 7). public static void click(int x, int y) throws AWTException{ Robot bot = new Robot(); bot.mouseMove(x, y); bot.mousePress(InputEvent.BUTTON1_DOWN_MASK); bot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK); } May be you could share the name of the … Read more
Do I have to use each time I need to update the GUI components? No, not if you’re already on the event dispatch thread (EDT) which is always the case when responding to user initiated events such as clicks and selections. (The actionPerformed methods etc, are always called by the EDT.) If you’re not on … Read more
Remove the border like so: button.setBorder(BorderFactory.createEmptyBorder()); and then also the contents1: button.setContentAreaFilled(false); 1: Taken from the solution added to the question by @3sdmx
The event dispatch thread is a special thread that is managed by AWT. Basically, it is a thread that runs in an infinite loop, processing events. The java.awt.EventQueue.invokeLater and javax.swing.SwingUtilities.invokeLater methods are a way to provide code that will run on the event queue. Writing a UI framework that is safe in a multithreading environment … Read more
First of all, change this line : image = ImageIO.read(getClass().getClassLoader().getResource(“resources/icon.gif”)); to this : image = ImageIO.read(getClass().getResource(“/resources/icon.gif”)); More info, on as to where lies the difference between the two approaches, can be found on this thread – Different ways of loading a Resource For Eclipse: How to add Images to your Resource Folder in the Project … Read more
Retrieve the content pane for the frame and use the setBackground() method inherited from Component to change the color. Example: myJFrame.getContentPane().setBackground( desiredColor );
Use the Toolkit to get the system clipboard. Create a StringSelection with the String and add it to the Clipboard. Simplified: StringSelection selection = new StringSelection(theString); Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard(); clipboard.setContents(selection, selection);