awt - w3toppers.com

Convert text content to Image

The Graphics 2D API should be capable of achieving what you need. It has some complex text handling capabilities as well. import java.awt.Color; import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics2D; import java.awt.RenderingHints; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; public class TextToGraphics { public static void main(String[] args) { String text = “Hello”; /* Because … Read more

AffineTransform.rotate() – how do I xlate, rotate, and scale at the same time?

Okay, this is a little slight of hand. The example code will only work for 90 degree increments (it was only designed this way), to do smaller increments you to use some trig to calculate the image width and height (there’s a answer somewhere for that to ;)) public class ImagePane extends JPanel { private … Read more

Why are my items not showing up in JFrame?

but when i run it i get this: You get an empty screen because you add the components to the frame after the frame is visible. As has already been suggested you need to use an appropriate layout manager. FlowLayout is the easiest to start with. invoke setVisible(true) AFTER adding the components to the frame. … Read more

Using addMouseListener() and paintComponent() for JPanel

This is not an immediate answer to your question, but knowing (or at least suspecting) what it is that you wish to offer (a simple paint program), I suggest starting with this approach based around a BufferedImage as the painting surface.. import java.awt.*; import java.awt.RenderingHints.Key; import java.awt.event.*; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.util.HashMap; … Read more

Using awt with android

The main problem is that you won’t be able do create classes in packages named java.awt. But except that point, basically you can rewrite a library based on awt API. You can also check awt-android-compat project.

Setting java.awt.headless=true programmatically

I was working with a main() in a class which statically loads different parts of JFreeChart in Constants (and other static code). Moving the static loading block to the top of the class solved my problem. This doesn’t work: public class Foo() { private static final Color COLOR_BACKGROUND = Color.WHITE; static { /* too late … Read more

java drag and drop

The major issues I can see are you are mixing two different API’s. You’re using both the low level D’n’D API and the newer “component D’n’D” API. Personally, the newer API annoys me, so I tend to avoid it. I can’t see why you need to transfer the label, when it would be better to … Read more

Problems with Java’s Paint method, ridiculous refresh velocity

The image fondo should already be scaled to 1200×600. I am not sure, but is super.paint(g) needed? You might also use paintComponent. The event handling (you seem to be moving by 1 pixel on key down), must be done correctly. I would have set the direction and speed (1px), and leave it to a swing … Read more

What is java.awt.Component.getName() and setName() used for?

Component.setName(..) is used in the JDK mostly by the look and feel implementation classes to set ID-like strings for each component, e.g. BasicOptionPaneUI might call it on a button component to set its name to “OptionPane.button”. The getName() is used in toString() methods, when setting the names of child components inside a Composite/parent Component and … Read more

how to drag and drop files from a directory in java

This is my take on the idea. I’ve used the “traditional” drag and drop API in this example. It has some extra “paint” tweaks just to show off what you might be able to do. This example doesn’t scan folders dropped onto it, so any folder will only register as a single file, but I’m … Read more