Java Program to Trim Leading and Trailing Spaces from a String

In Java, the trim() method is used to remove leading and trailing spaces from a string. This method does not remove spaces between words but it eliminates unnecessary spaces at the beginning and end of the string. The trim() method is defined under the String class in the java.lang package. It checks for Unicode value "\u002" which represents space characters.

Program to Trim Leading and Trailing Spaces from a String in Java

In this example, we will demonstrate how to use the trim() method to remove spaces from the beginning and end of a string.

Example:

// Java program to remove leading and trailing spaces
// using the trim() method
public class RemoveSpaces {
    public static void main(String args[]) {
      
        String s1 = "  Hello World  ";
        System.out.println(s1);
        System.out.println(s1.trim());

        String s2 = "     Java   Programming!      ";
        System.out.println(s2);
        System.out.println(s2.trim());
    }
}

  Hello World  
Hello World
     Java   Programming!      
Java   Programming!

Explanation: In the above example, the trim() method removed the leading and trailing spaces from both the strings s1 and s2 and it returns the new string without modifying the original, as strings in Java are immutable.