Write a method myConcat that takes a string of multiple words and it returns a string made up of all the words concatenated together with the whitespace removed.

Write a Java program that prompts the user for two strings, joins them, and displays the result in uppercase letters.

Write a method named sumOfStarts, which takes two Stringparameters named s1 and s2 and returns an int. The methodshould do the following:1. Return the sum of all the starting indices where s1 canbe found in s2.2. For example, if s1 is "goo" and s2 is "agoodegoodgo" thenthe method would sum 1 + 6 = 7.3. If s1 or s2 is null, or s1 cannot be found in s2, throw anIllegalArgumentException with the message "Null or notfound".4. You can assume any needed imports have already beenprovided.

Implement a new concat method in the String class you worked on for HW2. The method should return a new String object that represents the text you would end up with if the argument String were "added onto the end of" this String. For example, in the code below, the String object answer should represent the text "bookstore" and true should be printed the screen. char[] bookA = {'b', 'o', 'o', 'k'}; char[] storeA = {'s', 't', 'o', 'r', 'e'}; char[] bookstoreA = {'b', 'o', 'o', 'k', 's', 't', 'o', 'r', 'e'}; String book = new String(bookA); String store = new String(storeA); String bookstore = new String(bookstoreA); String answer = book.concat(store); System.out.println(answer.equals(bookstore)); In the text area below, type in your definition of the concat method. (In other words, type in the code that should replace the //TODO comment.) Your code cannot call any methods. public class String { private char[] data; public String(char[] value) { data = new...

When testing this java program I get a java.lang.NullPointerException for 3 sections of the function, specifically String remove, String reverse and String filterLetters

modify it to create a classthat contains a static method; the method takes a string as a parameter andreturns a boolean value indicating whether the parameter string has repeatedcharacters in it or not. That is, return true if there is at least one characterwhich appear more than once in the string. The string should be input by the user public class Qns3 {public static void main(String args[]) { //input.Scanner Input = new Scanner(System.in);System.out.println ( "Enter the String to check for duplicate characters:");String k = Input.next();// repeated = true.boolean Repeat = false;for (int i = 0; i < k.length(); i++)for (int j = i + 1; j < k.length(); j++)if (k.charAt(i) == k.charAt(j))Repeat=true;if (Repeat){System.out.println("String have repeated characters" +k);}elseSystem.out.println( "String have no repeated characters" +k);} }

Write a java class method named addQuotes that takes one parameter of type String. The method should return a string that's indentical to it's argument, but with a double quote character added at the beginning and end of the string.

Write a method which will remove any given character from a String?

Write a program that converts date formats from American Format: "February 4, 2021" to International Format, such as "2021-February-4". Hint: you may use several string methods, including: str.indexOf(c) and str.substring(p, q). Note: java programming, must detect comma

Write a program that prints all letters that occur a single time in a string. For example, if the string is Mississippi, print M, and if it is Missouri, print Mour. Use nested loops to solve this problem. CAN NOT EDIT ANY CODE OUTSIDE OF THE /* Your code goes here */

Write in JAVA

In netbeans, Write a method named findLastTwoLetters that is passed a String parameter and that prints the last two letters of the string. For example, "ta" is returned if the parameter is "Roberta". You are guaranteed as a precondition that the parameter will have a length greater than 1. This method can be completed using substring().

Create a method in JAVA that returns a string when it receives three ints