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The Java.io.File class is an abstract representation of file and directory pathnames. Following are the important points about File:

  • Instances may or may not denote an actual file-system object such as a file or a directory. If it does denote such an object then that object resides in a partition. A partition is an operating system-specific portion of storage for a file system.

  • A file system may implement restrictions to certain operations on the actual file-system object, such as reading, writing, and executing. These restrictions are collectively known as access permissions.

  • Instances of the File class are immutable; that is, once created, the abstract pathname represented by a File object will never change.

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βˆ™ 8y ago
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βˆ™ 15y ago

JAR stands for Java Archive File

It is nothing but an archive of Java class files. You can compare the jar file to a zip file which would compress and contain multiple document files.

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Q: What is a jar file in java?
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