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  1. 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 …

  2. 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 …

  3. 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 …

  4. How to import a .cer certificate into a java keystore?

    During the development of a Java webservice client I ran into a problem. Authentication for the webservice is using a client certificate, a username and a password. The client certificate I …

  5. 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 …

  6. 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 ?

  7. 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 …

  8. Java Versions and Compatibility - Stack Overflow

    Apr 10, 2023 · Java 20 was fully ready for production use. (Java 20 no longer receives updates a few months after the successive version 21 ships.) You said: What is the JDK to Java SE …

  9. What does the arrow operator, '->', do in Java? - Stack Overflow

    While hunting through some code I came across the arrow operator, what exactly does it do? I thought Java did not have an arrow operator. return (Collection<Car>) …

  10. java - How to find where javaw.exe is installed? - Stack Overflow

    Jul 12, 2013 · So, for a project I am working on, I need to find out where a javaw.exe is located on a user's machine. How do I do that? Assuming that user is on Windows machine The method …