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Which of the following is/are true about packages in Java?1) Every class is part of some package. 2) All classes in a file are part of the same package. 3) If no package is specified, the classes in the file   go into a special unnamed package 4) If no package is specified, a new package is created with   folder name of class and the class is put in this package.OptionsOnly 1, 2 and 4Only 1, 2 and 3Only 4Only 1 and 3

Question

Which of the following is/are true about packages in Java?1) Every class is part of some package. 2) All classes in a file are part of the same package. 3) If no package is specified, the classes in the file   go into a special unnamed package 4) If no package is specified, a new package is created with   folder name of class and the class is put in this package.OptionsOnly 1, 2 and 4Only 1, 2 and 3Only 4Only 1 and 3

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Solution

The correct answer is "Only 1, 2 and 3".

Here's why:

  1. Every class in Java is part of some package. This is true. If you do not specify a package, Java will put the class into a default package.

  2. All classes in a file are part of the same package. This is also true. In Java, you can't split a single file into multiple packages.

  3. If no package is specified, the classes in the file go into a special unnamed package. This is true as well. The unnamed package is the default package in Java, used only when no package is specified.

  4. If no package is specified, a new package is created with folder name of class and the class is put in this package. This is not true. If no package is specified, the class goes into the default (unnamed) package, not a new package named after the class.

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