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Importing packages

Linda Hamilton
Release: 2024-10-02 06:19:01
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  • When using a class from another package, you can qualify its name with the package name, but this can be tedious.

  • Full class name qualification becomes cumbersome when packages have deep hierarchies.

  • To make things easier, the Java language offers the import statement, allowing the use of package classes without requiring complete qualification.

  • The import statement makes the members of a package visible, allowing them to be used directly.

  • The general form of the import statement is: import package.classname;.

  • To import the contents of a package, you can use the import statement with an asterisk (*) to include all classes in the package.

  • Example of importing a specific class: import mypack.MyClass;.

  • Example of importing all classes from a package: import mypack.*;.

  • The import statement must be placed right after the package statement (if any) and before any class definition in the source file.

  • Using import allows you to give visibility to the bookpack package, facilitating the use of the Book class without requiring full qualification.

  • To use the Book class, add the import bookpack.* statement; at the beginning of the file.

Importando pacotes

  • Note that you no longer need to qualify Book with the package name.

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