You would add the JAR file to the Libraries in your project: (source: netbeans.org) As for the different JARs, joda-time-1.6.jar just contains the compiled classes (this is the JAR you need in order to use Joda in your project) joda-time-1.6-javadoc.jar contains the documentation for all the classes joda-time-1.6-sources.jar contains the source code for all the … Read more
We finally got a solution, but still don’t quite know why the situation occurs. When you have Compile On Save activated, Netbeans generates a second set of class files for debugging etc. These are stored in $USER/.netbeans/var/cache/index/s*/java/*/classes Somehow (not sure how) this directory can get corrupted or fail to update. If you close netbeans, delete … Read more
Since you make sure to put your instances.add(this) at the end of the constructor you should IMHO be safe to tell the compiler to simply suppress the warning (*). A warning, by its nature, doesn’t necessarily mean that there’s something wrong, it just requires your attention. If you know what you’re doing you can use … Read more
I encountered this problem in Netbeans 12.0 today using OpenJDK 14. It turns out the problem was resolved by installing the nb-javac plugin.
Create a Java archive (.jar) file using NetBeans as follows: Right-click on the Project name Select Properties Click Packaging Check Build JAR after Compiling Check Compress JAR File Click OK to accept changes Right-click on a Project name Select Build or Clean and Build Clean and Build will first delete build artifacts (such as .class … Read more
For some reason I am not so fond of counters, so I did it this way (It works for boards with different sizes). public boolean areFourConnected(int player){ // horizontalCheck for (int j = 0; j<getHeight()-3 ; j++ ){ for (int i = 0; i<getWidth(); i++){ if (this.board[i][j] == player && this.board[i][j+1] == player && this.board[i][j+2] … Read more
How to Use CardLayout With a new JFrame form, add a JPanel, a few JButtons to the form so it looks like this Your navigator pane should look like this. Notice I changed the variable names. You can do that by right clicking on the component from the navigator and selecting change variable name. Now … Read more
If it is Netbeans, try to uncheck “Compile on save” setting in the project properties (Build -> Compiling). This is the only thing which helped me in a similar situation.
Here’s an example using the observer pattern, also seen here, here and here. Note that it would also be possible to listen to the combo’s model. import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import javax.swing.*; /** * @see http://en.wikipedia.org/wiki/Observer_pattern * @see https://stackoverflow.com/a/10523401/230513 */ public class PropertyChangeDemo { public PropertyChangeDemo() { JFrame f … Read more
This was a pain, using netBeans IDE 7.2. You need to remember that Netbeans cleans up the Build folder whenever you rebuild, so Add a resource folder to the src folder: (project) src project package folder (contains .java files) resources (whatever name you want) images (optional subfolders) After the clean/build this structure is propogated into … Read more