How to replace string characters in java?

Below example shows how to get replace character or a string into a string with the given string. String provides replace() method to replace a specific character or a string which occures first. replaceAll() method replaces a specific character or a string at each occurence.

package com.myjava.string;

public class MyStringReplace {
    
    public static void main(String a[]){
    
        String str = "This is an example string";
        System.out.println("Replace char 's' with 'o':"
					+str.replace('s', 'o'));
					
        System.out.println("Replace first occurance of string\"is\" with \"ui\":"
					+str.replaceFirst("is", "ui"));
					
        System.out.println("Replacing \"is\" every where with \"no\":"
					+str.replaceAll("is", "no"));
    }
}