awt

How to convert Image to BufferedImage in Java? Note, that existing answer is apparently not correct, because it uses methods getWidth(null) and getHeight(null) , which can return -1 if image is not loaded yet ( Image is, by definition, an asynchronous object). Please, provide either more correct answer, or more proofs that existing answer is already correct. If it's important to you, you can use a MediaTracker to "wait" for the image to be loaded, then you don't need to care about supplying a ImageObserver try { MediaTracker mt = new MediaTracker(new JPanel()); Image image = Toolkit

How to get a color from the user as a String and use it in a method that accepts Color enum values? The idea is to get a color that the user chooses and pass the value (or handle the situation any other way) to a method element.setBackground(java.awt.Color) . I would create a Map<String, Color> and populate it with what String color names map to which Color objects. You can use java.awt.Color 's own static Color constants , e.g. colorMap.put("BLACK", Color.BLACK); , or you can insert your own mappings. Then you can take the user input and perform a lookup with get to get the proper Color

I'm making a simple (and bogus) computer power consumption calculator. I'm using a card layout to put multiple panels in but when I run it, there's just a small window not displaying anything. Here's my long code, I put it all in one class. package my.Project; import java.awt.*; import java.awt.event.*; import java.io.IOException; import java.net.URI; import java.net.URISyntaxException; import java.text.DecimalFormat; import javax.swing.*; public class MainProject extends JFrame { CardLayout cl; int motherboardP, oddP, hddP, ssdP, fanP, cpuP, gpuP, monitorP, hoursint; int ramNum, hddNum,

I need cast the jzy3d canvas to java.awt.component, I want to display the chart in my frame with JCombobox and button but when I want to cast canvas to component, the program was dropped. Thank you for your answers. I have try this and don't help me. Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: org.jzy3d.plot3d.rendering.canvas.VoidCanvas cannot be cast to java.awt.Component at cz.bia.Launcher.lambda$setComponents$0(Launcher.java:63) at java.awt.Button.processActionEvent(Button.java:409) at java.awt.Button.processEvent(Button.java:377) Launcher.java: package cz.bia;

I've got a window and I would like to get notified when the position or the size has changed. Which type of listener is the best to take? WindowListener didn't work for me. camickr You can use a ComponentListener which has the componentResized and componentMoved methods. You might want to try the HierarchyBoundsListene r myJFrame.getContentPane().addHierarchyBoundsListener(new HierarchyBoundsListener(){ public void ancestorMoved(HierarchyEvent e) { doSomething(); } public void ancestorResized(HierarchyEvent e) { doSomethingElse(); } see http://java.sun.com/docs/books/tutorial/uiswing/events