Ans. 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.
What does * mean in Java import?
if you import Java. util. * this means that you import all the classes of the utility package in the program. * means all of the classes are import to this program.
What does Java util * mean?
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.
Why is Java util * Used?
util. Provides the classes necessary to create an applet and the classes an applet uses to communicate with its applet context. Contains all of the classes for creating user interfaces and for painting graphics and images.
What is the significance of * in import package *?
The asterisk in the import statement can be used only to specify all the classes within a package, as shown here. It cannot be used to match a subset of the classes in a package. For example, the following does not match all the classes in the graphics package that begin with A . Instead, it generates a compiler error.
How do I import Java?
To import java package into a class, we need to use java import keyword which is used to access package and its classes into the java program. Use import to access built-in and user-defined packages into your java source file so that your class can refer to a class that is in another package by directly using its name.
What is difference between static block and constructor?
A static block, or static initialization block, is code that is run once for each time a class is loaded into memory. … A constructor is required for every class, since they run EACH time a new instance of a class is created. It is the method that sets up the class.
What is nextInt () in Java?
The nextInt() method of Java Scanner class is used to scan the next token of the input as an int. There is two different types of Java nextInt() method which can be differentiated depending on its parameter.
Does Java util * Include Scanner?
java. util is a package which contain some classes including Scanner class which we can use by : import java. util.
What are util classes in Java?
What is Utility Class? Utility Class, also known as Helper class, is a class, which contains just static methods, it is stateless and cannot be instantiated. It contains a bunch of related methods, so they can be reused across the application. As an example consider Apache StringUtils, CollectionUtils or java.
What is URL in Java?
The Java URL class represents an URL. URL is an acronym for Uniform Resource Locator. It points to a resource on the World Wide Web. … A URL contains many information: Protocol: In this case, http is the protocol.
What is use of package in Java?
Package in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for: Preventing naming conflicts. … Making searching/locating and usage of classes, interfaces, enumerations and annotations easier.
What is AWT package in Java?
awt Description. Contains all of the classes for creating user interfaces and for painting graphics and images. A user interface object such as a button or a scrollbar is called, in AWT terminology, a component. The Component class is the root of all AWT components.