How to Insert Character at Specific Index in String in Java - Step by Step Examples

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How to Insert Character at Specific Index in String in Java ?

Answer

To insert a character at a specific index in a string in Java, you can use the `StringBuilder.insert()` method.

✐ Examples

1 Insert '!' at index 5 in "Hello World"

In this example,

We create a StringBuilder object named str with a value of "Hello World".
We then use the insert() method of StringBuilder to insert the character '!' at index 5.
Finally, we convert the StringBuilder object to a string and print it.

Java Program

// Insert '!' at index 5 in "Hello World"
public class Main {
    public static void main(String[] args) {
        StringBuilder str = new StringBuilder("Hello World");
        str.insert(5, '!');
        System.out.println(str.toString());
    }
}

Output

Hello! World

Summary

In this tutorial, we learned How to Insert Character at Specific Index in String in Java language with well detailed examples.