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The Scanner class in Java is a part of the java.util package and is used to read input from various sources like keyboard, files, and streams. It's a simple text scanner which can parse primitive types and strings using regular expressions. A Scanner breaks its input into tokens using a delimiter, which by default matches whitespace.
Basic Usage of Scanner
To use the Scanner class, you need to create an instance of the class. When reading from the keyboard, you can pass System.in to the constructor of the Scanner class. For example:
Scanner scanner = new Scanner(System.in);For parsing strings, you can pass the string directly to the Scanner constructor:
Scanner scanner = new Scanner("Hello, World!");Reading Input with Scanner
The Scanner class provides various methods to read different data types. For instance, nextInt() to read an integer, nextDouble() for a double, nextLine() for a String, and so on. Here's a simple example of reading different types of input:
Scanner sc = new Scanner(System.in); Java User Input (Scanner class) - W3Schools
WEBThe Scanner class is used to get user input, and it is found in the java.util package. To use the Scanner class, create an object of the class and use any of the available methods found in the Scanner class documentation.
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WEBSo there you need the Scanner class. You have to import java.util.Scanner;, and in the code you need to use: Scanner input = new Scanner(System.in); input is a variable name.
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