java practice set 3

/*

Today we will solve some of the best problems in Java related to strings!. Here is the Chapter 3 – Practice Set

       1.  Write a Java program to convert a string to lowercase.

       2. Write a Java program to replace spaces with underscores.

       3.  Write a Java program to fill in a letter template which looks like below:

           letter = “Dear <|name|>, Thanks a lot”

          Replace <|name|> with a string (some name)

       4.  Write a Java program to detect double and triple spaces in a string.

       5.  Write a program to format the following letter using escape sequence characters.

           Letter = “Dear Harry, This Java Course is nice. Thanks”

*/

package com.company;

public class cwh_chapter3_practiceset {

    public static void main(String[] args) {

        //problem1

        String name="Madhurima Moulik";

        name =name.toLowerCase();

        System.out.println(name);

        //problem2

        String text="to   lower   case";

        text =text.replace("" , "_");

        System.out.println(text);

        //problem3

        String letter= "Dear <|name|> , Thanks a lot!";

        letter= letter.replace("<|name|>","MOON");

        System.out.println(letter);

        //problem4

        String myString =" this strings contains  duble and     triple spaces";

        System.out.println(myString.indexOf("  "));

        System.out.println(myString.indexOf("   "));

        //problem5

        String myletter ="\t dear moon.\n\t this java couse is nice ,\n\t thankx!";

        System.out.println(myletter);

    }

}