Imagine that the String toUpperCase method did not exist and you were asked to write one. You can't use the String toUpperCase method, but you can use methods on Character. Hint: There is a method Character.toUpperCase(char) which converts a char to uppercase. Hint: There is a method Character.toString(char) which converts a char to a String.
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- Create a program for Smalltown Regional Airport Flights that accepts either an integer flight number or string airport code from the options in Figure 8-33. Pass the user’s entry to one of two overloaded GetFlightInfo() methods, and then display a returned string with all the flight details. For example, if 201 was input, the output would be: Flight #201 AUS Austin Scheduled at: 0710 (note that there should be two spaces between 'Austin' and 'Scheduled'). The method version that accepts an integer looks up the airport code, name, and time of flight; the version that accepts a string description looks up the flight number, airport name, and time. The methods return a message if the flight is not found. For example, if 100 was input, the output should be Flight #100 was not found. If no flights were scheduled for the airport code entered, for example MCO, the message displayed should be Flight to MCO was not found.Write a method lastNameFirst that takes a string containing a name such as "Harry Smith" or "Mary Jane Lee", and that returns the string with the last name first, such as "Smith, Harry" or "Lee, Mary Jane".Write a method that turns some text into something Porky Pig would say. To do that, you just need to add "Bdap bdap bb " to before the given text. For example, if you called porkyPig("that's all folks!"), it would return "Bdap bdap bb that's all folks!" The method signature should be public String porkyPig(String something)
- Given a string, determine if it is an integer. For example the string “123” is an integer, but the string “hello” is not. It is an integer if all of the characters in the string are digits. Return true if it is an integer, or false if it is not. Hint: There is a method Character.isDigit() that takes a char as an argument and returns a boolean value. what is wrong in this code? public boolean isInteger(String) {for (int i = 0; i < String.length(); i++) {if (!Character.isDigit(String.charAt(i))) {return false;}}return true;}Add a static method, public static void changeLetter (StringBuilder sb, char letter) Convert all occurrences of the letter variable in the StringBuilder to upper case. Write in java and use test case example as reference.Your class StringDoubling has a method doubleString(), which takes a String as an input parameter and returns the doubled copy of that string. Your task: Finish your main method by follow the steps outlined in your main (precisely!) Basically, your program should read in a command-line argument, print it out, and then double it 5 times (printing it out every time). For example, if your command-line value is 0, your program should output the following: 0 00 0000 00000000 0000000000000000 00000000000000000000000000000000 and if your command-line value is a, your program should output the following: a aa aaaa aaaaaaaa aaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
- We need to create a method "reverse" which will have as input a string say sx and return a string which contains the reverse of sx. Ex: sx="Victor", the reverse of sx is : "rotciV". Remember that the "reverse" method is written from scratch. That means you cannot use another method already provided by the String method or use the StringBuilder library provided by the java compiler. Here is a skeleton of a program that I called Final_33. Please remember that the reverse() method below is where you write your code. public class Final_33 { public static void main(String[] args) { Scanner input = new Scanner(System.in); Final_33 r = new Final_33(); System.out.print("Enter the string you want to reverse: "); String s1 = input.nextLine(); System.out.println("Original String is: " + s1); System.out.println("Reverse of the string " + s1 + " is: " + r.reverse (s1));} public String reverse(String sx) { // fill in the code here } }Write a method specification for the method below.public String getDefinitionFromDictionary(String word)You can just provide code as you don't have required utility class, Please provide explanation and comments for code : Write a static method asciiGraph(), to display a “graph” of ASCII values of a String. 2.The method has a single String parameter str, and returns nothing (void).3.The method loops through all characters in str, and for each displays a line of *s on a row equal to the ASCII/Unicode integer value of the character being examined (see example).Hints:1. recall the String methods .charAt() and .length(), and casting a char with (int) directly returns the int ASCII/Unicode value2. to produce the line of *s, call the method starLine() from the Exam utility class3. in the output capture document, consider reducing the font size to 7 or 8 point to have each row of *s on a single line Consider the strings “Ab C” and “TED 99”, that are composed of:A displays 65 stars (*), since Unicode 65 = 'A'b 98 stars (*), since Unicode 98 = 'b'space 32 * , since Unicode 32 = ' ' (the space)C…
- The StringBuilder class is providedin the Java library. Provide your own implementation for the following methods(name the new class MyStringBuilder2):public MyStringBuilder2();public MyStringBuilder2(char[] chars);public MyStringBuilder2(String s);public MyStringBuilder2 insert(int offset, MyStringBuilder2 s);public MyStringBuilder2 reverse();public MyStringBuilder2 substring(int begin);public MyStringBuilder2 toUpperCase();U is upward, D is downward, L is left and R is right : Using the methods pickDir() and exractInt() as shown below, to write a simple automated game: how long does it take a robot to travel from a left line of a field to the right line? Assume field is 15 units apart (meters, kilometers, it doesn’t matter), and the robot starts on the left line. pickDir(): // return string with random direction and random distance (within maxDist) public static String pickDir (int maxDist) { Random r = new Random(); // random number generator // return direction + distance return ( "" + "LRUD".charAt( r.nextInt(4) ) + (r.nextInt(maxDist) + 1) ); } extractInt(): // returns integer from string, from pos p1 to p2: str = "D1" – extractInt(str,1,1); public static int extractInt (String str, int p1, int p2) { return ( Integer.parseInt( str.substring(p1, p2+1) ) ); } Write the main() method that keeps looping until the robot’s random left…Implement your own indexOf(String s) and lastIndexOf(String s) methods without using the built-in ones available in Java String class. Complete the following program://course: CSC190//project: Lab 12//date: (today’s date)//author: (your name)//purpose:import java.util.Scanner;class MyString {String s; //default constructor which sets s to a null string //your code here //additional constructor which sets s to the string passed from the caller //your code here //get and set methods for s //your code here //return the index within s of the first occurrence of str. //return -1 when str is not found on s. //if s = "aabababb", s = "aba", return 1 //if s = "aabababb", s = "abaa", return -1 int indexOf(String str) { //your code here} //return the index within s of the last occurrence of str. //return -1 when s is not found on str. //if s = "aabababb", s = "aba", return 3 //if s = "aabababb", s = "abaa", return -1 int lastIndexOf(String s) { //your…