How to check whether given String contains one or more words in Java?



Problem Description :


Write a program in Java that checks whether given String contains one or more words.

Concept :


If any String is separated by one or more spaces it means that String contains more than one word.We are using a Regular Expression to solve this problem.


Java Program :


package com.javamultiplex.string;

import java.util.Scanner;

/**
 * 
 * @author Rohit Agarwal
 * @category Date and Time
 * @problem Check whether string contains one or more words.
 *
 */
public class IsStringContainsOnlyOneWord {

 public static void main(String[] args) {

  Scanner input = null;
  try {
   input = new Scanner(System.in);
   System.out.println("Enter String : ");
   String string = input.nextLine();
   string = string.trim();
   /*
    * Regular expression that matches a string contains only
    * non-whitespace characters.
    */
   String pattern = "^[\\S]+$";
   if (string.matches(pattern)) {
    System.out.println("String contains only one word.");
   } else {
    System.out.println("String contains more than one word.");
   }

  } finally {
   if (input != null) {
    input.close();
   }
  }

 }

}

Output :


Case 1 :


Output of Java program that checks whether given string contains one or more words - Case1
Output - Given String contains more than one word.


Case 2 :


Output of Java program that checks whether given string contains one or more words - Case2
Output - Given String contains only one word.

References :


https://en.wikipedia.org/wiki/Regular_expression

https://docs.oracle.com/javase/7/docs/api/java/lang/String.html


https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#matches(java.lang.String)


https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#trim()


Thank you friends, I hope you have clearly understood the solution of this problem. If you have any doubt, suggestion or query please feel free to comment below. You can also discuss this solution in our forum.

Tags : Date and Time problems, Number of words in String, Solution in Java, Regular expressions, if else statement.

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How to check whether given String contains one or more words in Java? How to check whether given String contains one or more words in Java? Reviewed by Rohit Agarwal on 12/20/2016 Rating: 5

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