Java Examples - Removing whitespaces


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Problem Description

How to remove the white spaces?

Solution

Following example demonstrates how to remove the white spaces with the help matcher.replaceAll(stringname) method of Util.regex.Pattern class.

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
   public static void main(String[] argv) { 
      String str = "This is a Java program. This is another Java Program.";
      String pattern="[\\s]";
      String replace = "";
      Pattern p = Pattern.compile(pattern);
      Matcher m = p.matcher(str);
      str = m.replaceAll(replace);
      System.out.println(str);  
   }
}

Result

The above code sample will produce the following result.

ThisisaJavaprogram.ThisisanotherJavaprogram.

The following is an example to remove the white spaces.

import java.util.Scanner ;
import java.lang.String ;

public class Main {
   public static void main (String[]args) { 
      String s1 = null; 
      Scanner scan = new Scanner(System.in);
      System.out.println("Enter your string\n");
      s1 = scan.nextLine();
      System.out.println("Input String is  :\n"+s1);
      String s2 = s1.replaceAll("\\s+","");
      System.out.println("\n Output String is  :\n"+s2);
   }
}

The above code sample will produce the following result.

Enter your string

sairamkrishna mammahe
Input String is  :
sairamkrishna mammahe

Output String is  :
sairamkrishnamammahe

java_regular_exp.htm

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