What does util * mean in Java?

Java. util. * is a built-in package in Java which encapsulates a similar group of classes, sub-packages and interfaces . The * lets you import a class from existing packages and use it in the program as many times you need. You can find the list of all classes, interfaces, exceptions in the official document.

No, java. lang package is a default package in Java therefore, there is no need to import it explicitly . i.e. without importing you can access the classes of this package.

Import a Class Scanner; In the example above, java. util is a package , while Scanner is a class of the java. util package.

It means import all the classes and interfaces within java. util package and make them available to use within the current class or interface . This is shorthand wild card annotation for importing all classes within a particular package.