Answers for "how to replace a letter in a string java"

replace character in string java

String str = ".............................."; 

        int index = 5; 
  
        char ch = '|'; 
 
        StringBuilder string = new StringBuilder(str); 
        string.setCharAt(index, ch); 

        System.out.println(string);

how to replace a character with another character in a string in java

public class JavaExample{
   public static void main(String args[]){
	String str = new String("Site is BeginnersBook.com");

	System.out.print("String after replacing com with net :" );
	System.out.println(str.replaceFirst("com", "net"));

	System.out.print("String after replacing Site name:" );
	System.out.println(str.replaceFirst("Beginners(.*)", "XYZ.com"));
   }
}