There is a replace method provided by the String class that can be used to replace a character in a String with another character. The following code snippet demonstrates this:

 

[java]

package demo;

public class StringDemo {

public static void main(String[] args) { String str = “Hello World”; String modifiedStr = str.replace(‘o’, ‘i’); System.out.println(“Modified String is “+modifiedStr);

} }

[/java]

 

 

So the above code will replace all occurrences of the letter ‘o’ in the String “Hello World”  an ‘i’ and will print the following:

Helli Wirld