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  2. Classpath - Wikipedia

    en.wikipedia.org/wiki/Classpath

    java is the Java runtime launcher, a type of SDK Tool (A command-line tool, such as javac, javadoc, or apt)-classpath D:\myprogram sets the path to the packages used in the program (on Linux, -cp /home/user/myprogram) and; org.mypackage.HelloWorld is the name of the main class

  3. HotSpot (virtual machine) - Wikipedia

    en.wikipedia.org/wiki/HotSpot_(virtual_machine)

    HotSpot supports many command-line arguments for options of the virtual machine execution. Some are standard and must be found in any conforming Java virtual machine; others are specific to HotSpot and may not be found in other JVMs (options that begin with -X or -XX are non-standard). [14] [15] [16] [17]

  4. Garbage-first collector - Wikipedia

    en.wikipedia.org/wiki/Garbage-first_collector

    G1 was first introduced as an experimental option in Java SE 6 Update 14, [4] where it can be enabled with the following two command-line parameters: -XX:+UnlockExperimentalVMOptions and -XX:+UseG1GC With JDK 7, G1 was planned to replace CMS in the Hotspot JVM. There are two major differences between CMS and G1.

  5. Java virtual machine - Wikipedia

    en.wikipedia.org/wiki/Java_virtual_machine

    Overview of a Java virtual machine (JVM) architecture based on The Java Virtual Machine Specification Java SE 7 Edition. A Java virtual machine (JVM) is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode.

  6. OpenJ9 - Wikipedia

    en.wikipedia.org/wiki/OpenJ9

    Unlike other class data sharing (CDS) implementations, enabling the feature in OpenJ9 requires only one step: setting -Xshareclasses on the command line when you start your application. When specified, OpenJ9 creates a memory mapped file to store and share the classes in memory.

  7. Java bytecode - Wikipedia

    en.wikipedia.org/wiki/Java_bytecode

    Java bytecode is used at runtime either interpreted by a JVM or compiled to machine code via just-in-time (JIT) compilation and run as a native application. As Java bytecode is designed for a cross-platform compatibility and security, a Java bytecode application tends to run consistently across various hardware and software configurations.

  8. Command-line argument parsing - Wikipedia

    en.wikipedia.org/wiki/Command-line_argument_parsing

    PHP uses argc as a count of arguments and argv as an array containing the values of the arguments. [ 4 ] [ 5 ] To create an array from command-line arguments in the -foo:bar format, the following might be used:

  9. Java performance - Wikipedia

    en.wikipedia.org/wiki/Java_performance

    In November 2004, Nailgun, a "client, protocol, and server for running Java programs from the command line without incurring the JVM startup overhead" was publicly released. [59] introducing for the first time an option for scripts to use a JVM as a daemon, for running one or more Java applications with no JVM startup overhead. The Nailgun ...