- Java.util Package Classes
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- Java.util - Scanner
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Java.util.Scanner.nextInt(int radix) Method
Description
The java.util.Scanner.nextInt() method scans the next token of the input as an int. This method will throw InputMismatchException if the next token cannot be translated into a valid int value as described below. If the translation is successful, the scanner advances past the input that matched.
Declaration
Following is the declaration for java.util.Scanner.nextInt() method
public int nextInt(int radix)
Parameters
radix − the radix used to interpret the token as an int value
Return Value
This method returns the int scanned from the input
Exception
InputMismatchException − if the next token does not match the Integer regular expression, or is out of range
NoSuchElementException − if the input is exhausted
IllegalStateException − if this scanner is closed
Example
The following example shows the usage of java.util.Scanner.nextInt() method.
package com.tutorialspoint; import java.util.*; public class ScannerDemo { public static void main(String[] args) { String s = "Hello World! 3 + 3.0 = 6.0 true "; // create a new scanner with the specified String Object Scanner scanner = new Scanner(s); // find the next int token and print it // loop for the whole scanner while (scanner.hasNext()) { // if the next is a int, print found and the int with radix 4 if (scanner.hasNextInt()) { System.out.println("Found :" + scanner.nextInt(4)); } // if no int is found, print "Not Found:" and the token System.out.println("Not Found :" + scanner.next()); } // close the scanner scanner.close(); } }
Let us compile and run the above program, this will produce the following result −
Not Found :Hello Not Found :World! Found :3 Not Found :+ Not Found :3.0 Not Found := Not Found :6.0 Not Found :true