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

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

Answer

To replace a character at a specific index in a string in Java, you can convert the string to a char array, modify the character at the desired index, and then convert it back to a string.

✐ Examples

1 Replace character at specific index in a string

In this example,

We create a string named str.
We convert the string to a char array using the toCharArray() method.
We replace the character at index index with the character newChar.
We convert the modified char array back to a string using the String constructor.
Finally, we print the modified string str.

Java Program

public class Main {
    public static void main(String[] args) {
        String str = "Hello World";
        int index = 6;
        char newChar = 'x';
        char[] charArray = str.toCharArray();
        charArray[index] = newChar;
        str = new String(charArray);
        System.out.println(str);
    }
}

Output

Hello xorld

Summary

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

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