What does the import java.util.* statement mean?

What does the "import java.util.*" statement mean?

1. "import java.util.*;" means importing all classes under the util package into the program;

2. Import "import java.util.*;" "If you want to use other classes in the util package later in the program, you don't need to re-import the package;

3. * represents a wildcard character, including all classes of util.

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Related introduction:

Two import statements of import

Single type Import (single-type-import) (Example: import java.util.ArrayList; );

Type-import-on-demand (Example: import java.util.*;) .

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