I'm trying to calculate the average of grades that a user puts in. Here is my code so far:
public static void main(String[] args) {
Scanner input = new Scanner (System.in);
System.out.println("Please enter an array of grades seperated bt a comma.");
input.nextLine();
String arrayOfGrades = "100,50,100";
String[] grades = arrayOfGrades.split(",");
[Code] .....
I think I'm on the right track, the only big error I'm really getting is the line: sum += grades[i]. It's saying string can not be converted into a double.
I am having an array of strings and i want to find out whether these strings contained in the array contain a similar character or not.For example i am having following strings in the array of string:
aadafbd dsfgdfbvc sdfgyub fhjgbjhjd
my program should provide following result: 3 because i have 3 characters which are similar in all the strings of the array(f,b,d).
So I'm trying to write a program that will take in 5 numbers, store them in an array and then print out the array and the average of the array. Problem is that every time I run my program I get a "ArrayIndexOutOfBoundsException: 5" error and I don't know who to fix it.
public class ConstructorHomework { final static int size = 5; static double[] myArray = new double[size]; public static double average; public void printArray(){
public class StuTest { private static Scanner keyboard = new Scanner(System.in); public static void main(String[] args){ int[][] testScores; // [students][tests] String[] stuNames;
[Code] ....
The method I am having issues with is the "printStudentReport" method. I am trying to calculate the average of a randomly generated number of students and tests. For my "printTestReport" method, I have to calculate the average of the test by test number.
Find the numbers which is closest to the average sum for a given array of N (1<=N<=50) of natural numbers. If there are two numbers who meet the requirement, return the smaller of the two.
For example for the array of: 1,2,3,4,5,6 the average sum is 3.5, so both 3 and 4 are the closest to that, but the program has to return 3, because it's smaller than 4.
The array can also contain duplicates. First we type the number of elements in the array, then in each line we add the numbers. Name of the class: Array
**Note**: Create a data structure array and use it.
And this is what they have given to me, I just need to type the code:
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Array<E> { public static int closestNumber( ) {
public static int getSum(int[] data) { int sum = 0; for (int i = 0; i < data.length; i++) { sum += data[i]; } return sum;
[code]....
The input is the following arary (Its from the Junit test that fails this): [Integer.MIN_VALUE, -1, 0, 1, Integer.MAX_VALUE].I get an average of 0.0 when it should be -0.2.
Conditions : Need to print all the inputted data(name,score) and the average.
import java.util.Scanner; public class Case2 { public static void main(String[] args) { Scanner input = new Scanner(System.in); int[] score = new int[5]; String[] name = new String[5]; int ave = 0;
I need my code to print out the top three most common IP Addresses in the ArrayList. Right now I have it printing out the top IP Address. I am a little confused as to how to get it to print out three. Every time I change something, It doesn't give me the correct results
My Code: public class Log_File_Analysis { private static ArrayList<String> ipAddress = new ArrayList<>(); private static String temp , mostCommon; static int max = 0; static int num = 0;
An array has objects with String firstName, String lastName, int ID, char examType('M' or 'F'), and int score. Every object has both Midterm('M') and Final('F'). The array has to be sorted by the first Midterm- 'M' and immediately followed by the Final ('F') of the same person (object). Im having troubles with coming up with a proper algorithm with gettin the Final- 'F' after Midterm for the same person.
Java Code: public static Exam[] collateExams(Exam[] exams) { Exam [] r = new Exam[10]; r = exams; int[] position = new int[10]; int index = 0; for(int i = 0; i < exams.length; i++)
I am working on an assignment where I initially have to take as input a number. That number will be the number of strings the user is going to type. As they are typed, they are to be sorted alphabetically, then printed. It took me a while to get this far, and I am stuck on how to properly invoke the other methods in main. There has to be at least three methods: main, one to do the sorting, and one to print the new array. I'm quite sure there are mistakes in my code, but this is definitely a challenge for me. Here is the code. Keep in mind that the methods being invoked are blank on purpose.
I am not allowed to use the Arrays, Arraylist or Collection class. This is basically to test my ingenuity and to see how arrays actually work.
import java.util.*; public class Sort_as_Inserted { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter number of elements to be sorted: "); String element_number = input.nextLine();
Every time i try and add a new word to personalDictionary, it only replaces the first index. In my personalAdd method i had tried to add a running count to advance the position it would be saving in but it doesn't seem to be working correctly...
Java Code:
import java.util.Arrays; import java.util.Scanner; import java.io.File; import java.io.PrintWriter; import java.io.FileNotFoundException; public class SpellingChecker
I am trying to update a Rubik's cubes side by adding each of the 9 squares of the Rubik's cube's side.
So for example:
cube.front.squares = cube.fronts.squares[1] + cube.front.square[2] + cube.left.sqaures[8] ... //until 9 sqaures are added, where squares is a String array of size 9. However, when I try doing this I get an error stating "change 'square' to 'String'". I know I can go in an individually change the values like:
I'm writing a command line application of a calculator in Java. I need to be able to (as per program requirements) split the array of strings (6+3) into an array of strings? How would that be done? I know you can use the split method, but I am not really sure how that wold work to perform math with them?
On a side note: for this application, how could you make the program accept a variety of different lengths of strings to perform math with them?
I am having a problem with the following code. It compiles and runs fine however my output is wrong.
public class SplitString { public static void main(String[] args) { String[] string1 = split("ab#12#453", "#"); String[] string2 = split("a?b?gf#e", "[?#]"); for (int i = 0; i < string1.length; i++) { System.out.print(string1[i] + ",");
[code]....
The split method in the String class returns an array of strings consisting of the substrings split by the delimiters. However, the delimiters are not returned. Implement the following new method that returns an array of strings consisting of the substrings split by the matching delimiters, including the matching delimiters.public static String[] split(String s, String regex)For example, split("ab#12#453", "#") returns ab, #, 12, #, 453 in an array of String, and split("a?b?gf#e", "[?#]") returns a, b, ?, b, gf, #, and e in an array of String.
I can sort strings in a collection by uppercase and then lowercase though I was wondering if there is any way of doing it in reverse, sorting by lowercase then by uppercase.
I am new on this and I will be working in a gpa and average program. This is my code so far: Every time that I try to add the gpa part it gives me errors or just duplicates whatever I've in average and displays it in gpa
/** * This program shows a database of students in a school. * It gathers information as name, classes, grades, and calculates average and gpa average. * */ import javax.swing.JOptionPane;
