Java String strip()

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In this guide, you will learn about the String strip() method in Java programming and how to use it with an example.

1. String strip() Method Overview

Definition:

The strip() method in Java is part of the String class and was introduced in Java 11. It is used to remove the leading and trailing white spaces from a string. Unlike trim(), which considers anything less than or equal to U+0020 (space character) as whitespace, strip() uses the Unicode Character Property “White_Space” to identify whitespaces.

Syntax:

public String strip()

Parameters:

The method does not take any parameters.

Key Points:

- It removes all kinds of leading and trailing whitespaces as defined by the Unicode standard, not just the space character.

- If the string has no leading or trailing whitespaces, the same string is returned.

- It is Unicode-aware, making it more versatile than trim() for strings that may contain non-ASCII characters.

2. String strip() Method Example

public class StripExample {
    public static void main(String[] args) {
        String str = " \t  \u2005Java\u2005   \n";
        String strippedString = str.strip();
        System.out.println("Original String: [" + str + "]");
        System.out.println("Stripped String: [" + strippedString + "]");
    }
}

Output:

Original String: [ 	  Java 
]
Stripped String: [Java]

Explanation:

In this example, the str string contains various types of whitespaces including tabs, spaces, and the Unicode character \u2005 (Four-Per-Em Space) around the word "Java". 

After calling the strip() method, all the leading and trailing whitespaces are removed, and only the word "Java" is left, which is printed to the console.

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