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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. Setting JAVA_HOME - Stack Overflow

    JAVA_HOME if you installed the JDK (Java Development Kit) or JRE_HOME if you installed the JRE (Java Runtime Environment). In the Variable Value field, enter your JDK or JRE …

  3. 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 …

  4. Is there a java setting for disabling certificate validation?

    11 Use cli utility keytool from java software distribution for import (and trust!) needed certificates Sample: From cli change dir to jre\bin Check keystore (file found in jre\bin directory) keytool …

  5. java - How to directly initialize a HashMap (in a literal way)?

    Java bundles two classes implementing that interface, one mutable, the other immutable: AbstractMap.SimpleEntry, AbstractMap.SimpleImmutableEntry. But we need not specify a …

  6. Java JRE 64-bit download for Windows? - Stack Overflow

    49 I'm working on a web site project with a Java component and am currently testing for cross-browser compatibility. Most is fine but the Java part won't load on 64-bit browsers. Looks like I …

  7. windows - How to resolve Java Runtime (class file version 55.0), …

    Exception in thread "main" java.lang.UnsupportedClassVersionError: myProject has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of …

  8. 'Java' is not recognized as an internal or external command

    The relevance of the JAVA_HOME variable is a tenacious myth. Java 1.0 and 1.1 used this variable but since then (for a quarter century now), this variable is not used by Java at all. Only …

  9. java - Switching between different JDK versions in Windows

    Nov 18, 2014 · java -version pause And after running this bat, I see right version of Java. But when I close this CMD and open a new one and type "java -version" it says that I still have …

  10. 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 …