I am writing a code that requires a user to input a number, then output the individual digits and then add the sum of the digits. I have the entire program written, but I cannot figure out how to make zeros output as individual digits. If I input 400, it only shows 4 and not 4 0 0. Here is the code:
import java.util.*;
public class week4program {
public static void main(String[] args) {
[Code].....
I set these up, but the command console comes up, I don't see the "Hello World" in the window and it closes.
How can I get the output "Hello World!" to appear in a "cmd" window and stay there till i close it?
How do I put this code in a way that it works because I know it is probably something obvious but I cant find how to make the array readable without error. It is supposed to intake two values and output what day of the week it is.
Testing Program
Initial day: Monday
Next day: Tuesday
Next day again: Wednesday
Previous day: Tuesday
Next week: Tuesday
Add 4 days from initial day: Friday
[Code] ....
ERROR ; Days.java:5: error: class, interface, or enum expected
String[] days = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};
^
1 error
I had to make a program that allows the user to enter 3 sides and it should output "invalid" if it does not make a triangle and if it does make a triangle it calculates the area of the triangle and it doesnt seem to do anything but say "invalid" as the out put.
import java.util.Scanner;
public class MyTriangle {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
boolean valid = true;
double side1, side2, side3, area, A;
[Code] ....
why this code only displays four zeros ?????
public class VargjetUshtrimi2 {
public static void main (String a []) {
int r[] = new int[11];
for (int i = 1 ;i < 10; i++)
{System.out.println( r[i] );}
}
Ok, so let's say I am having a user input scores and at the end I want to print out the results so I do something like:
int[] Scores = new int[1000];
//code to ask user for input and store into array //
The user only inputs lets say 5 scores out of possible 1000. I then try to print it out by doing something like this:
for(int counter = 0; counter < Scores.length; ++counter) {
System.out.println(Scores[counter])
}
How would I go about printing out only the index's that were input, because right now it prints out the scores and then 995 0's after.
How do i change the outcome to below? at the moment it is all 0? How I can clear some clouds in this area.
Competitor 1: 11111
===============================================
Competitor 2: 22222
===============================================
Competitor 3: 33333
===============================================
Competitor 4: 44444
===============================================
Competitor 5: 55555
===============================================
Here's the code:
case 2: System.out.println("Menu item 2");
for(int i=1; i<MAX_COMPS;i++){
System.out.print("Competitor " + i + ": ");
for (int j=1;j<MAX_SCORES;j++)
System.out.print(scores[i][j] + " ");
System.out.println("");
}
why I need to populate an array with leading zeros. It sounds like it wants me to populate the entire array for one number (string). When I use next(), it separates the numbers so why do I need to go the leading zeros route?
This assignment will give you practice with external input files and arrays. You are going to write a program that adds together large integers. The built-in type int has a maximum value of 2,147,483,647. Anything larger will cause what is known as overflow. Java also has a type called long that has a larger range, but even values of type long can be at most 9,223,372,036,854,775,807.The approach you are to implement is to store each integer in an array of digits, with one digit per array element. We will be using arrays of length 50, so we will be able to store integers up to 50 digits long. We have to be careful in how we store these digits. Consider, for example, storing the numbers 38423 and 27. If we store these at the front of the array with the leading digit of each number in index 0 of the array, then when we go to add these numbers together, we're likely to add them like this:
38423
27
To simulate this right-shifting of values, we will store each value as a sequence of exactly 50 digits, but we'll allow the number to have leading 0's. For example, the problem above is converted into:
0000000000000000000038423
0000000000000000000000027
Now the columns line up properly and we have plenty of space at the front in case we have even longer numbers to add to these.The data for your program will be stored in a file called sum.txt. Each line of the input file will have a different addition problem for you to solve. Each line will have one or more integers to be added together. Take a look at the input file at the end of this write-up and the output you are supposed to produce. Notice that you produce a line of output for each input line showing the addition problem you are solving and its answer. Your output should also indicate at the end how many lines of input were processed. You must exactly reproduce this output.
You should use the techniques described in chapter 6 to open a file, to read it line by line, and to process the contents of each line. In reading these numbers, you wont be able to read them as ints or longs because many of them are too large to be stored in an int or long. So youll have to read them as String values using calls on the method next(). Your first task, then, will be to convert a String of digits into an array of 50 digits. As described above, youll want to shift the number to the right and include leading 0s in front.
The String method charAt and the method Character.getNumericValue will be useful for solving this part of the problem.You are to add up each line of numbers, which means that youll have to write some code that allows you to add together two of these numbers or to add one of them to another. This is something you learned in Elementary School to add starting from the right, keeping track of whether there is a digit to carry from one column to the next. Your challenge here is to take a process that you are familiar with and to write code that performs the corresponding task.
Your program also must write out these numbers. In doing so, it should not print any leading 0s. Even though it is convenient to store the number internally with leading 0s, a person reading your output would rather see these numbers without any leading 0s.You can assume that the input file has numbers that have 50 or fewer digits and that the answer is always 50 digits or fewer. Notice, however, that you have to deal with the possibility that an individual number might be 0 or the answer might be 0. There will be no negative integers in the input file.You should solve this problem using arrays that are exactly 50 digits long. Certain bugs can be solved by stretching the array to something like 51 digits, but it shouldnt be necessary to do that and you would lose style points if your arrays require more than 50 digits.The choice of 50 for the number of digits is arbitrary (a magic number), so you should introduce a class constant that you use throughout that would make it easy to modify your code to operate with a different number of digits.
Consider the input file as an example of the kind of problems your program must solve. We might use a more complex input file for actual grading. The Java class libraries include classes called BigInteger and BigDecimal that use a strategy similar to what we are asking you to implement in this program. You are not allowed to solve this problem using BigInteger or BigDecimal. You must solve it using arrays of digits.Your program should be stored in a file called Sum.java.
Input file sum.txt
82384
204 435
22 31 12
999 483
28350 28345 39823 95689 234856 3482 55328 934803
7849323789 22398496 8940 32489 859320
729348690234239 542890432323 534322343298
3948692348692348693486235 5834938349234856234863423
999999999999999999999999 432432 58903 34
82934 49802390432 8554389 4789432789 0 48372934287
0
0 0 0
7482343 0 4879023 0 8943242
3333333333 4723 3333333333 6642 3333333333
Output that should be produced
82384 = 82384
204 + 435 = 639
22 + 31 + 12 = 65
999 + 483 = 1482
28350 + 28345 + 39823 + 95689 + 234856 + 3482 + 55328 + 934803 = 1420676
7849323789 + 22398496 + 8940 + 32489 + 859320 = 7872623034
729348690234239 + 542890432323 + 534322343298 = 730425903009860
[code]....
I am writing a program that adds together large integers. I have to store each integer in an array of digits, with one digit per array element. Array length is 50 so integer is 50 digits long. I have to store numbers in right-shifting format with leading zeros. For example,
0000000000000000000038423
0000000000000000000000027
Sum.txt contains numbers to be added. There could be one or more numbers per line.each line must be read as string with next() since it's assumed to be a very long number. String of digits needs to be converted into an array of 50 digits. Method CharAt and Character.getNumericValue will be useful. All numbers in each line are to be added. There are no negative numbers and individual number might be 0 or answer might be 0. Answer is always 50 digits or fewer.
BigDecimal or BigInteger are not allowed.
I'm lost where it says to put number with leading zeros in a 50 room array. How do I add numbers after formatting numbers with leading zeros?
I have an array made that represents digits and I am trying to make a method so that if there are zeros in front of the first significant digit I want to trim them, I understand you can't re size arrays so I have created a new array, but my code doesn't seem to run correctly? Here is my code I can't figure out what is wrong I've tried everything: (I put stars around the error**)
package music;
import java.util.Random;
public class Music {
private int length; // length of the array
private int numOfDigits; // number of actual digits in the array
int[] musicArray;
[Code] .......
If I have 0123.45 string and trying to get 12345 as result. I am trying regex like below.
String s="0123.45";
s = s.replaceAll("^0*([0-9]+).*", "$1");
It gave result 123 as leading zeros removed that is one of the things that I want. How do I achieve 12345?
I got situation where i have postal code as 0009 in database and the use is entering 0009 but somehow in my java code it only reading 9 from the xml file
This is how i define getter and setter
When i debug the code i get
passed postalcode 9
Java Code:
public String Postalcode="";
public void setPostalcode(String Postalcode) {
this.Postalcode = Postalcode;
}
public String getPostalcode() {
return Postalcode;
} mh_sh_highlight_all('java');
What if 0009 is passed i what it to remain 0009
Any way to place leading zeros onto numbers without having to convert them to strings? Is such a thing possible?
View Replies View RelatedI got situation where i have postal code as 0009 in database and the use is entering 0009 but somehow in my java code it only reading 9 from the xml file
This is how i define getter and setter :
When I debug the code i get this :
passed postalcode 9
if a user entered 0009 I what it to remain 0009
Java Code:
public String Postalcode="";
public void setPostalcode(String Postalcode) { this.Postalcode = Postalcode; }
public String getPostalcode() { return Postalcode; }
ex
Sample input:2340980
Sample Output:23498
this is the program i have tried but is dosent work
import java.util.*;
class zero
{
public static void main(String args[])
{
[Code]....
We are making a tic tac toe game for my CS120 class and I am having trouble figuring out how to make our X's and O's. Is there a way to make shapes besides making two lines for an X and an oval with a white smaller oval inside to make an O? We have only learned the basics so far in class (i.e. events, inheritance, client-supplier, etc.)
These are our instructions:
Write a controller that controls the game. There is one human player (the X player) and the computer player (the O player). The name of the class must be TicTacToeController. In a sense, the controller is the game since the controller will 1) create a TicTacToeModel 2) create a TicTacToeView and 3) create a TicTacToeButton (you must write this class following the design pattern covered in class lectures), a label, and text field such that when the button is pushed, the player moves into the cell selected by the text field. After every player move, the computer moves into a randomly selected empty cell. When the game is over, a text message must be displayed somewhere on the screen the gives the status of the game. While you are free to change the appearance of the controller, the basic elements must be provided (a view of the game, a button, and a text field to enter the cell). A sample screenshot is displayed below.And this is the code i have thus far:
[import java.awt.*;
import javax.swing.JFrame;
public class TicTacToeView extends Rectangle
public TicTacToeView(int x, int y, int w, int h) {
super(50,60,w,h);
this.setBackground(Color.red);
JFrame win = new JFrame("Tic Tac Toe");
win.setBounds(10,10,w+100, h+100);
win.setLayout(null);
win.setVisible(true);
win.setBackground(Color.gray);
[code]....
my output fails to display me the 2nd output.Here's my code.
import java.util.Scanner;
public class year
{
public static void main (String [] args)
{
Scanner console = new Scanner (System.in);
System.out.print("Enter the choice of book(A-ABC,D-EFG):");
String x = console.next();
System.out.print("Enter the rate (1-3):");
int y= console.nextInt();
System.out.print("Enter number of kids reading:");
int k = console.nextInt();
[code]....
When I key '0" for kids, it did not appear the second print out. I don't want the first print out to be the output.
New to programming, see my code
import java.util.Scanner;
class LeftBottomTriangleNew2
{
public static void main(String[] args)
[Code]....
the staircase looks good,however I want to remove the last line and if user chooses 9 i want them to get message "enter number from 1 to 8" and do not print out the staircase.
I have been working through a problem, and I have working what I need to work. However, it prints out to the command line and I want to output to a GUI. I have set up the GUI and everything seems fine there, the problem is when I try to change the output that was coming through the command prompt to a JTextField. I am getting the following error.
The field DataAnalyzerGUI.dataOutput is not visible
Java Code:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class DataAnalyzerGUI extends JFrame {
private JPanel contentPanel;
private JButton btnExit;
private JButton btnClose;
private JButton btnFBdata;
[code]....
I need this to print output opposite the way it is. When it reads my file it prints it out like this:
4X^0+3X^1+-2X^2+5X^3+6X^5
But is needs to be this:
6x^5+5x^3+-2x^2+3x^1+4x^0
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Iterator;
import java.util.Set;
[code]....
Any way i can format this output into columns?
for(int i = 0; i < 5; i++) {
System.out.println(t[i]+n[i]+s[i]);
}
I am writing this program for my Java level 1 class. I am able to get it to compile and run, however nothing is outputted. Below are the instructions and the code that I have written.
Instructions:
Write an application that calculates and displays the amount of money a user would have if his or her money could be invested at 5 percent interest for one year. Create a method that prompts the user for the starting value of the investment and returns it to the calling program. Call a separate method to do the calculation, and return the result to be displayed.
Below is the code that I have written
import java.util.Scanner;
public class Interest
{
//main method
public static void main(String[] args)
{
originalAmount();
Scanner input = new Scanner(System.in);
[code]....
I am a beginner in Java and had started writing a program to read text from a file and want to output each row to JTextField.
I want to compare each row of number so I need a field where each row of data keeps refreshing.
I can do it with Visual Basic with loop, Me.refresh, and system.thread.sleep. But I need to achieve it with Java.
I use System.out.println(num); which showed all rows of the file.
When I use textArea.append(num + ""); to output it, I only got all rows displayed after it reached the end. (textArea = new JTextArea("",10,30);
If I use dataRead.setText(num); to output it, I only got the last row displayed after it reached the end. dataRead = new JTextField(7);
i need to take a txt file and turn it into a csv(comma seperated value) output on console but where to begin.
View Replies View RelatedYou are given a file containing the names and addresses of company employees from many years ago that your manager has asked you to import into a database. You can use a CSV file and your database application to load the file, but the file your manager gave you was exported from an old, non-standard accounting system. Here is its format:
Fred|Flintstone
1212|Bedrock
Austin|Texas
Harry|Potter
1234|Hogwarts Road
[Code] .....
I'm not sure why, but my program does not produce an output. It is supposed to output total charges.
/*This program provides the user with the price of their monthly internet service based on two inputs.The program asks users which subscription they have. The options are A, B, or C. This is the first input.
The program then will ask the user how many hours they used the internet for. This is the second input.Then, based on the package number, the program will compute their monthly bill. This is the output.
The program calculates the price based on the following prices:
Package A: For $9.95 per month, 10 hours of access are provided. Additional hours are $2.00 per hour.
Package B: For $13.95 per month, 20 hours of access are provided. Additional hours are $1.00 per hour.
Package C: For $19.95 per month, access is unlimited.*/
import java.util.Scanner;
public class Lab03SV
[code]...