A .class file is a compiled .java file. .java is all text and is human readable. .class is binary (usually). You compile a java file into a class file by going to the command line, navigating to the .java file, and running javac “c:\the\path\to\your\file\yourFileName.java” You must have a java SDK installed on your computer (get … Read more
import javax.swing.Timer; Add an attribute; Timer timer; boolean b; // for starting and stoping animation Add the following code to frame’s constructor. timer = new Timer(100, new ActionListener() { @Override public void actionPerformed(ActionEvent ae) { // change polygon data // … repaint(); } }); Override paint(Graphics g) and draw polygon from the data that was … Read more
It is actually good design but not obvious and what you want to do would have no effect so it is a little counter intuitive. These types of applications live their lives in containers and as such their entry points are determined by the standards those containers must adhere to. The designers of these standards … Read more
Have them draw directly in a BufferedImage by way of it’s Graphics2D object which you can get via getGraphics(). Then use ImageIO.write(…) to output the image to whatever file type you desire (and that’s supported). The ImageIO API should help you with this: ImageIO API. The other issue you’ll have is where are they supposed … Read more
I’ve read about WebSockets but they don’t seem to be pure “sockets”, because there is an application layer protocol over them. [Is the] websocket protocol so simple to implement that [it is] “almost”-sockets? Allowing regular socket connections directly from the browser is never going to happen because it opens up a huge risk. WebSockets is … Read more
You may corrupt the file during copy/transfer. Are you using maven? If you are copying keystore file with “filter=true”, you may corrupt the file. Please check the file size.
Don’t ever call Thread.sleep(…) from within the Swing event thread as this will put the event thread itself to sleep. Since this thread is responsible for all Swing painting and user interaction, this will put your application to sleep. If all you want is a delay in the display, then consider use of a Swing … Read more
jd-gui is the best decompiler at the moment. it can handle newer features in Java, as compared to the getting-dusty JAD.
Your code was compiled with Java Version 1.8 while it is being executed with Java Version 1.7 or below. In your case it seems that two different Java installations are used, the newer to compile and the older to execute your code. Try recompiling your code with Java 1.7 or upgrade your Java Plugin.
Here’s another variation on your layout. Using @Andrew’s tag-in-source method, it’s easy to test from the command line: $ /usr/bin/appletviewer HomeApplet.java // <applet code=”HomeApplet” width=”400″ height=”200″></applet> import java.awt.BorderLayout; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JApplet; import javax.swing.JButton; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTabbedPane; import javax.swing.JTextField; import javax.swing.SwingUtilities; public class HomeApplet extends JApplet { @Override … Read more