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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]
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.
JFLAP (Java Formal Languages and Automata Package) is interactive educational software written in Java for experimenting with topics in the computer science area of formal languages and automata theory, primarily intended for use at the undergraduate level or as an advanced topic for high school.
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]
The Java Module System was initially being developed under the Java Community Process as JSR 277 and was scheduled to be released with Java 7. JSR 277 later was put on hold and Project Jigsaw [2] was created to modularize the JDK. This JSR was superseded by JSR 376 (Java Platform Module System).
The user cannot replace this class name using the invocation java -jar. Class-Path describes the location of supportLib.jar relative to the location of the library helloWorld.jar . Neither absolute file path, which is permitted in -classpath parameter on the command line, nor jar-internal paths are supported.
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In 2000, Jason Hunter, author of "Java Servlet Programming" described a number of "problems" with JavaServer Pages. [21] Nevertheless, he wrote that while JSP may not be the "best solution for the Java Platform" it was the "Java solution that is most like the non-Java solution," by which he meant Microsoft's Active Server Pages .