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  2. Java package - Wikipedia

    en.wikipedia.org/wiki/Java_package

    JAR files are created with the jar command-line utility. The command jar cf myPackage.jar *.class compresses all .class files into the JAR file myPackage.jar. The 'c' option on the command line tells the jar command to "create new archive." The ' f ' option tells it to create a file. The file's name comes next before the contents of the JAR file.

  3. JAR (file format) - Wikipedia

    en.wikipedia.org/wiki/JAR_(file_format)

    A JAR ("Java archive") file is a package file format typically used to aggregate many Java class files and associated metadata and resources (text, images, etc.) into one file for distribution. [4] JAR files are archive files that include a Java-specific manifest file. They are built on the ZIP format and typically have a .jar file extension. [5]

  4. Apache Ant - Wikipedia

    en.wikipedia.org/wiki/Apache_Ant

    It is similar to Make, but is implemented using the Java language and requires the Java platform. Unlike Make, which uses the Makefile format, Ant uses XML to describe the code build process and its dependencies. [4] Released under an Apache License by the Apache Software Foundation, Ant is an open-source project.

  5. OSGi - Wikipedia

    en.wikipedia.org/wiki/OSGi

    Bundles are normal JAR components with extra manifest headers. Services The services layer connects bundles in a dynamic way by offering a publish-find-bind model for plain old Java interfaces or plain old Java objects (POJOs). Services Registry The application programming interface for management services. Life-Cycle

  6. Java collections framework - Wikipedia

    en.wikipedia.org/wiki/Java_collections_framework

    java.util.Collection class and interface hierarchy Java's java.util.Map class and interface hierarchy. The Java collections framework is a set of classes and interfaces that implement commonly reusable collection data structures. [1] Although referred to as a framework, it works in a manner of a library. The collections framework provides both ...

  7. Java class loader - Wikipedia

    en.wikipedia.org/wiki/Java_class_loader

    Each Java class must be loaded by a class loader. [3] [4] Furthermore, Java programs may make use of external libraries (that is, libraries written and provided by someone other than the author of the program) or they may be composed, at least in part, of a number of libraries. When the JVM is started, three class loaders are used: [5] [6] [2]

  8. Java Class Library - Wikipedia

    en.wikipedia.org/wiki/Java_Class_Library

    The Java Class Library (JCL) is a set of dynamically loadable libraries that Java Virtual Machine (JVM) languages can call at run time. Because the Java Platform is not dependent on a specific operating system , applications cannot rely on any of the platform-native libraries.

  9. Java syntax - Wikipedia

    en.wikipedia.org/wiki/Java_syntax

    A snippet of Java code with keywords highlighted in bold blue font. The syntax of Java is the set of rules defining how a Java program is written and interpreted. The syntax is mostly derived from C and C++. Unlike C++, Java has no global functions or variables, but has data members which are also regarded as global variables.