Basically, you create a Function interface: and then pass in an anonymous subclass to your method. Your method could either apply the function to each element in-place: or create a new List (basically creating a mapping from the input list to the output list): Which one is preferable depends on your use case. If your … Read more
Typically for local variables I initialize them as late as I can. It’s rare that I need a “dummy” value. However, if you do, you can use any value you like – it won’t make any difference, if you’re sure you’re going to assign a value before reading it. If you want the char equivalent … Read more
Well you probably want array_name.length for getting the count of the rows and array_name[0].length for the columns. That is, if you defined your array like so:
javapackager The Java Packager tool compiles, packages, and prepares Java and JavaFX applications for distribution. The javapackager command is the command-line version. – Oracle’s documentation The javapackager utility ships with the JDK. It can generate .exe files with the -native exe flag, among many other things. WinRun4J WinRun4j is a java launcher for windows. It … Read more
No, APK Manager decompiles the .dex file into .smali and binary .xml to human readable xml. The sequence (based on APK Manager 4.9) is 22 to select the package, and then 9 to decompile it. If you press 1 instead of 9, then you will just unpack it (useful only if you want to exchange … Read more
From Java Tips: Difference between ear jar and war files: These files are simply zipped files using the java jar tool. These files are created for different purposes. Here is the description of these files: .jar files: The .jar files contain libraries, resources and accessories files like property files. .war files: The war file contains … Read more
You have to flush and / or close the file to get the data written to the disk. Add out.close() in your code:
I would use this:
We’ve run into a Java.lang.OutOfMemoryError: PermGen space error and looking at the tomcat JVM params, other than the -Xms and -Xmx params we also specify -XX:MaxPermSize=128m. After a bit of profiling I can see occasionally garbage collection happening on the PermGen space saving it from running full. My question is: other than increasing the -XX:MaxPermSize … Read more
tl;dr: No, there isn’t such a thing in Java. You can assign initial values to variables like this: But if your want (1, 2, 3) to be the result of a method call, this is not possible in Java. Java does not allow returning multiple values. Python allows this: The main point, why this does … Read more