If you wanted to know the position of the letter v (i.e. return 2) in the String str containing the word "Java", which of the following code should you use? " O mid(2,str); O str.indexof(v); O str.charAt(2); O str.position(v'); O indexof(str,v');
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- If you wanted to know the position of the letter v (i.e. return 2) in the String str containing the word "Java", which of the following code should you use? * mid(2,str); str.indexOf('v); str.charAt(2); str.position(v'); indexOf(str,v');Language: Java Write a program that reads a sentence from the keyboard. Depending on the last character of the sentence, print the message identifying the sentence as declarative (ends with a period), interrogative (ends with a question mark), exclamatory (end with an exclamation point), or other. Hint: you can use charAt() method from the String class to extract the last character of the input line. The character of a String str is at str.length()-1 position. For taking a sentence as input use the nextLine() method from the Scanner class. You have to use if/else if selection. Sample input and output: Sample 1 Input: How are you? Output: Interrogative Sample 2 Input: I am good. Output: Declarative Sample 3 Input: That is amazing! Output: Exclamatory Sample 4 Input: Although, Output: Other Answer:String spell = "Redikulus"; How would you find the index of the 'u' just before the last 's' using a single line of code? Multiple answers may be correct. Given the string String spell = "Redikulus"; How would you find the index of the 'u' just before the last 's' using a single line of code? Multiple answers may be correct. A. spell.substring(5, spell.length()).indexOf('u'); B. spell.indexOf('u', 5); C. spell.lastIndexOf('u'); D. spell.contains('u'); E. spell.indexOf('u', spell.length() - 2); F. spell.indexOf('u', spell.indexOf('l'));
- Java - Create a flowchart and write the method signature for the following: a. A method that takes a String of 13 digits creates and returns an array of ints with 13 positions. The array should contain the integer equivalents of the digits in the original string.. a("123456789012") --> false a("1234567890123")--> trueIn java, without Arrays and using only String methods ( don't use String builder) // Question 17: In MS-DOS, a file name consists of up // to 8 characters (excluding '.', ':', backslask, '?', // and '*'), followed by an optional dot ('.' character) // and extension. The extension may contain zero to three // characters. For example, 1STFILE.TXT is a valid filename. // Filenames are case-blind. // // Write and test a method that takes // in a String, validates it as a valid MS-DOS file // name, appends the extensions ".TXT" if no extension // is given (that is, no '.' appears in FILENAME), converts // the name to uppercase, and returns the resulting string // to the calling method // If fileName ends with a dot, remove that dot and do not // append the default extension. If the name is invalid, // validFileName should return null. public String validFileName(String n) { }I can't figure out the error in this code. Heres the code: from tkinter import * class Calculator:# define the text on each buttonButtonValues=[['7','8','9','/'], ['4','5','6','*'], ['1','2','3','-'], ['0','C','=','+']]def __init__(self):self.Calc = Tk()self.Calc.title('Calculator') # Create two frames: frame1 is to house the display acreen# frame2 is to house all the buttonsself.frame1=Frame(self.Calc)self.frame2=Frame(self.Calc) #self.expression = ""self.equation=StringVar() # Create an Entry display and bind the entry to a StringVar instance# equation:# You can call set() to set a value in the entry or call get() to# get a value from the entryself.theDisplay = Entry(self.frame1, width=30, textvariable=self.equation)self.myButtons= [] # Define all the buttonsdef SetButtons(self):self.frame1.pack()self.frame2.pack(side=BOTTOM) self.theDisplay.grid(row=0) self.myButtons.append([])self.myButtons[0].append(Button(self.frame2,text=Calculator.ButtonValues[0][0],…
- note: You can easily replace a portion of text within a String using the String method "replace()". For example: String svar = "raspberry jam"; svar = svar.replace("jam", "pie"); System.out.println(svar); will print out: raspberry pie A photographer is organizing a photo collection about the national parks in the US and would like to annotate the information about each of the photos into a separate set of files. Write a program that reads the name of a text file containing a list of photo file names. The program then reads the photo file names from the text file, replaces the "_photo.jpg" portion of the file names with "_info.txt", and outputs the modified file names. Assume the unchanged portion of the photo file names contains only letters and numbers, and the text file stores one photo file name per line. If the text file is empty, the program produces no output.This is the issue and must be written in java:Write an application that accepts three specific User strings and shows either You have not entered the words alphabetically or You have entered the strings alphabetically depending on whether the strings were in alphabetic order.Signature will be public static void changeLetter(StringBuilder sb, String Letters) Make it so any letters from the second parameter found in the String Builder are converted to uppercase. Write in Java and use testcase examples as a reference.
- Select the correct and safe ways to read a string with spaces from the user at the runtime and store it in character array of length 20 .(character (name fgets( name, 21, stdin); fgets("%19s",name,stdin); fgets(name, 19, stdin); scanf("%19s", name); scanf("%s", name); scanf("%19s", &name);This is the question and needs to be written in java: Write an application that accepts three unique Strings from the user and, without regard to case, appropriately displays either You did not enter the words in alphabetical order or You entered the strings in alphabetical order depending on whether the Strings were entered in alphabetical order.Code with comments and output screenshot. Thank you!! Write a java method that receives a string containing letters of the English alphabet and then prints the Letters having unique frequencies. Notes: 1) Ignore letter case; Uppercase and lowercase letters are considered the same. 2) Do not use methods from the Arrays class.