LAF | Linux Application Firewall | Firewall library

I'm trying to trace someone's code and I've encountered a section that I'm a little confused about. Firstly the file from the github repo I'm looking at is https://github.com/tahoe-lafs/zfec/blob/master/zfec/easyfec.py. But I'll paste the part that I'm confused about below. I have 2 questions. Firstly,

From easyfec.py

The below code displays a JFrame with a JMenu and a [custom] JPanel.

I set the look-and-feel (LAF) to Windows LAF by calling method UIManager.setLookAndFeel

I click on the JMenu with the mouse and then I move the mouse onto the [custom] JPanel – while the menu is still visible. Then I click the mouse again and the mousePressed method of the MouseListener on my [custom] JPanel does not get called, even though the mouseReleased method does.

If I do not explicitly set the LAF, i.e. if I use the default LAF, it works fine.

How can I fix this?

Below are two classes: MListen and Panel. Class MListen declares a main method, so you can launch that class. Then you can perform the actions described above to reproduce the behavior. Class Panel is my custom JPanel.

I want the mousePressed method of the MouseListener, in class Panel to be called every time that the mouse is pressed if it is on the Panel.

• MListen.java

I am having a hard time trying to compile a very large .class file via my IDE (Netbeans). The IDE throws StackOverflow error and states that the system is running out of resources.

None of the following worked:

1. Change Netbeans netbeans_default_options in etc folder to this: "-J-XX:+UseStringDeduplication -J-Xss4m -J-Xms1024m -J-Xmx2048m -J-Djdk.gtk.version=2.2 -J-Dapple.laf.useScreenMenuBar=true -J-Dapple.awt.graphics.UseQuartz=true -J-Dsun.java2d.noddraw=true -J-Dsun.java2d.dpiaware=true -J-Dsun.zip.disableMemoryMapping=true -J-Dplugin.manager.check.updates=false -J-Dnetbeans.extbrowser.manual_chrome_plugin_install=yes -J--add-opens=java.base/java.net=ALL-UNNAMED -J--add-opens=java.base/java.lang.ref=ALL-UNNAMED -J--add-opens=java.base/java.lang=ALL-UNNAMED -J--add-opens=java.base/java.security=ALL-UNNAMED -J--add-opens=java.base/java.util=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing.plaf.basic=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing.text=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing=ALL-UNNAMED -J--add-opens=java.desktop/java.awt=ALL-UNNAMED -J--add-opens=java.desktop/java.awt.event=ALL-UNNAMED -J--add-opens=java.prefs/java.util.prefs=ALL-UNNAMED -J--add-opens=jdk.jshell/jdk.jshell=ALL-UNNAMED -J--add-modules=jdk.jshell -J--add-exports=java.desktop/sun.awt=ALL-UNNAMED -J--add-exports=java.desktop/java.awt.peer=ALL-UNNAMED -J--add-exports=java.desktop/com.sun.beans.editors=ALL-UNNAMED -J--add-exports=java.desktop/sun.swing=ALL-UNNAMED -J--add-exports=java.desktop/sun.awt.im=ALL-UNNAMED -J--add-exports=jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED -J--add-exports=java.management/sun.management=ALL-UNNAMED -J--add-exports=java.base/sun.reflect.annotation=ALL-UNNAMED -J--add-exports=jdk.javadoc/com.sun.tools.javadoc.main=ALL-UNNAMED -J-XX:+IgnoreUnrecognizedVMOptions"
2. Configure Java through java control panel:

3. Trying to set via CMD and compile the .class file manually with javac. I run this: set _JAVA_OPTIONS=-Xss4m, but still it doesn't work.

The only thing that did work was invoking directly javac and passing directly the -J-Xss4m option, like so:

Hi I'm trying to have multiple buttons with disabled text color different from button to button. I have made it in windows but not work on osx

My Android Studio has been stuck at loading screen since yesterday. X_X

What I have tried:

1. Restarting computer.
2. Clearing junk files and logs.
3. Completely uninstall and then Reinstalling AndroidStudio.
4. Followed many different solutions (e.g: one of it is here). But still doesn't work. Excerpt from the solution:

• Open file Android Studio setup directory/bin/idea.properties
• Add disable.android.first.run=true to end
• Restart Android Studio

1. When I deleted the SDK it worked, but then after I let it download the SDK again, it opens for that session, then stuck again on the next session.

Well, I don't want to always delete and re-download the SDK every time I open Android Studio. So does anyone have any solution to this?

Thanks

More Info:

I am trying to make a function that creates a JButton. The button either increases or decreases an R, G, or B value(red, green, blue). The user enters a few parameters,

• the buttons parent (JPanel)
• The text on the button (String)
• The function of the button either increase or decrease (boolean)
• The color value that the user wishes to change (int)

So if the user wishes to increase green, the integer value, userGreen should increase by 15. However when I tried increasing it I got an error, saying:

Local variable userRed defined in an enclosing scope must be final or effectively final

My actual program has a lot of variables and other functions attached and attaching the whole program would be far too long, so I made the shortest example I could. This example simply counts the number of times the button is pressed and prints it to the console.

This produces the same error

Local variable clickNumber defined in an enclosing scope must be final or effectively final

Is it possible to change the value of a parameter within a JButton's Action Listener? And why does the variable need to be final?

Does anyone know what the * following a filename in macOS terminal means?

All the file names in the folder:

/System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands

have a * trailing them and I'm not sure why.

For example:

In base r I can subset a data.frame based on a row range:

mtcars[1:5,]

Or I can subset based on a logical condition:

mtcars[mtcars$cyl==6,]

But I don't appear to be able to do both:

mtcars[1:5 & mtcars$cyl==6,]

Warning message: In 1:5 & mtcars$cyl == 6 : longer object length is not a multiple of shorter object length

Is there another way to do this?

The use case is loading a huge .csv with the LaF package, which allows for filtering using commands similar to base r, but which loads things much quicker with row ranges than with conditions, and adding more than one condition means that I will sometimes have to wait a day for the data to load.

I'm trying to change the button background color and text (foreground) color while the mouse button is pressed, using Swing UI in Java. My main class is pretty simple and straightforward: