How to Remove All Whitespace Characters from a String in Java - Step by Step Examples

How to Remove All Whitespace Characters from a String in Java ?

Answer

To remove all whitespace characters from a string in Java, you can use the `replaceAll` method with a regular expression.

✐ Examples

1 Remove Whitespace from "Hello World"

In this example,

We create a string variable str with a value of "Hello World".
We then use the replaceAll method with a regular expression \\s+ to replace all whitespace characters (including tabs, spaces, newlines, etc.) with an empty string in str.
Finally, we print the modified string str.

Java Program

public class Main {
    public static void main(String[] args) {
        String str = "Hello World";
        String modifiedStr = str.replaceAll("\\s+", "");
        System.out.println("Modified string: " + modifiedStr);
    }
}

Output

Modified string: HelloWorld

2 Remove Whitespace from "apple\tbanana\n cherry "

In this example,

We create a string variable str with a value of "apple\tbanana\n cherry ".
We then use the replaceAll method with a regular expression \\s+ to replace all whitespace characters (including tabs, spaces, newlines, etc.) with an empty string in str.
Finally, we print the modified string str.

Java Program

public class Main {
    public static void main(String[] args) {
        String str = "apple\tbanana\n cherry  ";
        String modifiedStr = str.replaceAll("\\s+", "");
        System.out.println("Modified string: " + modifiedStr);
    }
}

Output

Modified string: applebananacherry

Summary

In this tutorial, we learned How to Remove All Whitespace Characters from a String in Java language with well detailed examples.

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How to Remove All Whitespace Characters from a String in Java - Step by Step Examples

How to Remove All Whitespace Characters from a String in Java ?

Answer

✐ Examples

1 Remove Whitespace from "Hello World"

Java Program

Output

2 Remove Whitespace from "apple\tbanana\n cherry "

Java Program

Output

Summary

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