How to remove space in string both end in java Program -

public class StringTrimExample {
  public static void main(String args[]) {
    String s1 = " hello string	";
    System.out.println(s1 + "TechSarvam"); //without trim() System.out.println(s1.trim()+"TechSarvam");//with trim()
  }
}

Step-by-Step Breakdown:

1. Class and Method Declaration:

public class StringTrimExample

{

public static void main(String args[])

{

The program declares a class StringTrimExample.
The starting point of execution is the main approach.

2. String Declaration:

String s1 = ” hello string\t”;

A string s1 is declared and initialized with the value ” hello string\t”.
Notice that this string has a leading space (” “) before “hello”, and there is a trailing whitespace (tab character) after “string”. The tab is denoted as \\\\\\\\t in Java.

3. Print Without Using trim()

System.out.println(s1 + “TechSarvam”);

This statement prints the string s1 concatenated with the string “TechSarvam”.
The string s1 still retains leading and trailing whitespaces that will get reflected in the output.

4. Using trim() Method:

System.out.println(s1.trim() + “TechSarvam”);

The trim() method is used on the string s1 which removes any leading and trailing white spaces (spaces, tabs, etc.)
From the string, all the leading spaces and the trailing tab are removed after applying the trim().
This line prints the string s1 trimmed with “TechSarvam”.

Program Output:

Without trim():

When we print s1 + “TechSarvam”, the string s1 is still holding its leading space and the trailing tab. It’ll look something like this:

hello string TechSarvam

In the above case, the printed leading space before “hello” and the tab character after “string”.

Using trim():

When we invoke s1.trim(), the leading and trailing whitespaces are removed. The output will be:

hello stringTechSarvam

The leading space before “hello” and the tab after “string” is gone.

Full Program Output: