How to Trim a String in Java - Step by Step Examples

◀ Previous Next ▶

How to Trim a String in Java ?

Answer

To trim a string in Java, you can use the trim() method of the String class.

✐ Examples

1 Trimming " Hello World "

In this example,

We create a string named str1 with a value of " Hello World ".
We then use the trim() method on str1 to remove leading and trailing whitespace characters.
Finally, we print the trimmed string.

Java Program

// Trimming "   Hello World   "
public class Main {
    public static void main(String[] args) {
        String str1 = "   Hello World   ";
        String trimmedStr1 = str1.trim();
        System.out.println("Trimmed string is: '" + trimmedStr1 + "'");
    }
}

Output

Trimmed string is: 'Hello World'

2 Trimming leading whitespace from " apple"

In this example,

We create a string named str2 with a value of " apple".
We then use the replaceAll() method with a regular expression to remove leading whitespace characters.
Finally, we print the trimmed string.

Java Program

// Trimming leading whitespace from "   apple"
public class Main {
    public static void main(String[] args) {
        String str2 = "   apple";
        String trimmedStr2 = str2.replaceAll("^\\s+", "");
        System.out.println("Trimmed string is: '" + trimmedStr2 + "'");
    }
}

Output

Trimmed string is: 'apple'

3 Trimming trailing whitespace from "banana "

In this example,

We create a string named str3 with a value of "banana ".
We then use the replaceAll() method with a regular expression to remove trailing whitespace characters.
Finally, we print the trimmed string.

Java Program

// Trimming trailing whitespace from "banana   "
public class Main {
    public static void main(String[] args) {
        String str3 = "banana   ";
        String trimmedStr3 = str3.replaceAll("\\s+$", "");
        System.out.println("Trimmed string is: '" + trimmedStr3 + "'");
    }
}

Output

Trimmed string is: 'banana'

Summary

In this tutorial, we learned How to Trim a String in Java language with well detailed examples.

◀ Previous Next ▶

Java Tutorials

Java How-Tos

How to Trim a String in Java - Step by Step Examples

How to Trim a String in Java ?

Answer

✐ Examples

1 Trimming " Hello World "

Java Program

Output

2 Trimming leading whitespace from " apple"

Java Program

Output

3 Trimming trailing whitespace from "banana "

Java Program

Output

Summary

More Java Strings Tutorials