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Classpath is a parameter in the Java Virtual Machine or the Java compiler that specifies the location of user-defined classes and packages. The parameter may be set either on the command-line, or through an environment variable.
Contents
1Overview and architecture
2Setting the path to execute Java programs
2.1Supplying as application argument
2.2Setting the path through an environment variable
2.3Setting the path of a Jar file
2.4Adding all JAR files in a directory
2.5Setting the path in a manifest file
3OS specific notes
4See also
5References
6External links
Overview and architecture
edit
See also: Java class loader
Similar to the classic dynamic loading behavior, when executing Java programs, the Java Virtual Machine finds and loads classes lazily (it loads the bytecode of a class only when the class is first used). The classpath tells Java where to look in the filesystem for files defining these classes.
The virtual machine searches for and loads classes in this order:
By default only the packages of the JDK standard API and extension packages are accessible without needing to set where to find them. The path for all user-defined packages and libraries must be set in the command-line (or in the Manifest as
Classpath Tutorials: In Java, the classpath tells the Java Virtual Machine where to look for user-defined classes and packages when running Java programs. The classpath is a parameter and can be set either on the command-line, or through an environment variable.
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