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Is there a difference between x++ and ++x in java?
Jul 7, 2009 · 12 In Java there is a difference between x++ and ++x ++x is a prefix form: It increments the variables expression then uses the new value in the expression. For example if used in code: int x = 3; int y = ++x; //Using ++x in the above is a two step operation.
java - Extracting .jar file with command line - Stack Overflow
Dec 10, 2011 · Java has a class specifically for zip files and one even more specifically for Jar Files. java.util.jar.JarOutputStream java.util.jar.JarInputStream using those you could, on a command from the console, using a scanner set to system.in Scanner console = new Scanner(System.in); String input = console.nextLine(); then get all the components and write …
java - && (AND) and || (OR) in IF statements - Stack Overflow
Java has 5 different boolean compare operators: &, &&, |, ||, ^ & and && are "and" operators, | and || "or" operators, ^ is "xor" The single ones will check every parameter, regardless of the values, before checking the values of the parameters. The double ones will first check the left parameter and its value and if true (||) or false (&&) leave the second one untouched. Sound …
java - What is a classpath and how do I set it? - Stack Overflow
Mar 7, 2010 · I was just reading this line: The first thing the format() method does is load a Velocity template from the classpath named output.vm Please explain what was meant by classpath in this context, a...
java - SSL and cert keystore - Stack Overflow
Aug 16, 2021 · How does my Java program know where my keystore containing the certificate is? Or alternatively: How do I tell my Java program where to look for the keystore? After specifying the keystore in some ...
What are the -Xms and -Xmx parameters when starting JVM?
Feb 7, 2013 · The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool. This means that your JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of memory. For example, starting a JVM like below will start it with 256 MB of memory and will …
debugging - What are Java command line options to set to allow …
Sep 26, 2008 · I know there's some JAVA_OPTS to set to remotely debug a Java program. What are they and what do they mean ?
What is the percent % operator in java? - Stack Overflow
May 15, 2017 · What is the percent % operator in java? Asked 8 years, 2 months ago Modified 4 years ago Viewed 63k times
logging - How to use log levels in java - Stack Overflow
Apr 28, 2011 · The java.util.logging.Level documentation does a good job of defining when to use a log level and the target audience of that log level. Most of the confusion with java.util.logging is in the tracing methods.
java - How do I set the proxy to be used by the JVM - Stack …
Sep 23, 2008 · Many times, a Java app needs to connect to the Internet. The most common example happens when it is reading an XML file and needs to download its schema. I am behind a proxy server. How can I set ...