Remove spaces from String Java Program

Java program to Remove spaces from a string

October 13, 2022

Remove spaces from String

In this page we will look at how to write a java program to remove spaces from a string.

Here we will store the string in a character array lets say s and that original string will contain the spaces in between.

Example:-

Input string: “Prep insta”
Output string: “Prepinsta”

Algorithm

Take string input from user and store it in the variable called “s”.
After that convert that string to char array using toCharArray() method.
Make a string buffer object and run the for loop start from i=0 to i<c.length.
check if( (c[i] != ‘ ‘) && (c[i]!= ‘\t’ )) append that character to string buffer and after that simply print string buffer.

Code in Java (Method-1 without using in-built method)

Run

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
	  Scanner sc =new Scanner(System.in);
	  String s = "Prepinsta is best";
	  char[] c = s.toCharArray();
	  StringBuffer sb = new StringBuffer();
	  
	  
	  for (int i = 0; i < c.length; i++) {
	     if( (c[i] != ' ') && (c[i]!= '\t' )) {
	    	 sb.append(c[i]);
	     }    	
          }
	  System.out.println("String after removing spaces : "+sb);
    }
}

Output

String after removing spaces : Prepinstaisbest

Note Make a StringBuffer object and check each for each character array that element should not be blank there should not be any whitespaces if the condition is true append that element to StringBuffer object after that print StringBuffer object in which String doesn't contain any blank spaces.

Code in Java (Method-2 using in-built method)

Run

import java.util.Scanner;

public class Main {
      public static void main(String[] args) {
      StringBuffer sb = new StringBuffer();
	String s = "Prepinsta is best";
	String[] s1 = s.split("[\\s]");
	for (String string : s1) {
		sb.append(string);
	}
    System.out.println(sb);
   }
}

Output

String after removing spaces : Prepinstaisbest

Juggling algorithm for array rotation

Balanced Parenthesis Problem

Toggle each character in a string

Count the number of vowels

Length of the string without using strlen() function

Prime Course Trailer

Related Banners

Get PrepInsta Prime & get Access to all 200+ courses offered by PrepInsta in One Subscription

13 comments on “Java program to Remove spaces from a string”

Dipika
public class Main {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
String str = sc.nextLine();
String s1 = “”;
s1 = str.replaceAll(” “, “”);
System.out.println(s1);
}
}

8

Log in to Reply