The functionality of java.util.Scanner class is used to read the data from the keyboard, The Scanner class will break the input as tokens by utilizing a delimiter. It gives numerous techniques to peruse and parse different values of primitive. Following is the syntax declaration for java.util.Scanner class. [java] public final class Scanner extends Object implements Iterator<String> [/java] An iterator replaces Enumeration in the Java Collections Framework. Iterators permit the guest to expel components.

Following are the common using methods of java.util Scanner Class.

The functionality of the java.util.Scanner.nextInt() method is to scan the following token as an int. The following is the syntax declaration of the method. [java]public int nextInt()[/java] DemoScanner.java [java] import java.util.Scanner; class ReverseNumber { public static void main(String[] args) { int temp=0; System.out.println("Enter the number to be reverse"); Scanner s=new Scanner(System.in); int n=s.nextInt(); while(n!=0){ temp=temp*10; temp=temp+n%10; n=n/10; } System.out.println(+temp); } } [/java] Following is the interactive diagram for the above reverse the number code. Output: Now compile the code result will be as follows. [java] Enter the number to be reverse 45264 46254 [/java]

The functionality of the java.util.Scanner.next() method is to give back the following token from the scanner. The following is the syntax declaration of the method. [java]public String next()[/java] DemoScanner.java [java]package com.SPlessons; import java.util.*; public class DemoScanner { public static void main(String[] args) { String s = "SPLessons Stop Thinking Start Coding...!"; // create a new scanner with the specified String Object Scanner scanner = new Scanner(s); // find the next token and print it System.out.println("" + scanner.next()); // find the next token and print it System.out.println("" + scanner.next()); System.out.println("" + scanner.next()); System.out.println("" + scanner.next()); System.out.println("" + scanner.next()); // close the scanner scanner.close(); } } [/java] In the above example, A total token is gone before and took after by input that matches the delimiter design. Output: Now compile the code result will be as follows. [java] SPLessons Stop Thinking Start Coding...! [/java]

The functionality of the java.util.Scanner.nextLine() method is to move the scanner position to the following line and returns the esteem as a string. The following is the syntax declaration of the method. [java]public String nextLine()[/java] DemoScanner.java [java] package com.SPlessons; import java.util.*; public class DemoScanner { public static void main(String[] args) { String s = "Welcome to SPlessons...! \n Start Coding "; // create a new scanner with the specified String Object Scanner scanner = new Scanner(s); // print the next line System.out.println(scanner.nextLine()); // print the next line again System.out.println(scanner.nextLine()); // close the scanner scanner.close(); } } [/java] The java.util.Scanner.nextLine() technique gives back whatever remains of the present line, barring any line separator toward the end. Output: Now compile the code result will be as follows. [java] Welcome to SPlessons...! Start Coding [/java]

The functionality of the java.util.Scanner.nextByte() method is to scan the following token as a byte. The following is the syntax declaration of the method. [java]public byte nextByte()[/java] DemoScanner.java [java] package com.SPlessons; import java.util.*; public class DemoScanner { public static void main(String[] args){ // Declare File object // initialize the scanner Scanner scan = new Scanner("12 13 -21 -7 1A"); // tokenize the string on the constructor input while(scan.hasNext()){ // get the byte tokens System.out.println(scan.nextByte(16)); } scan.close(); } } [/java] The hasNext() strategy is used to return true if this scanner has other token in its input. Output: Now compile the code result will be as follows. [java] 18 19 -33 -7 26 [/java]

• Java.util Scanner - The java.util.Scanner.close() method is used to close the scanner.
• Java.util Scanner - The java.util.Scanner.locale() method is used to indicate the locale of the scanner.
• Java.util Scanner - The java.util.Scanner.radix() method is used to return the default radix of the scanner.