Using Sentinel Value To End A Program?
Mar 24, 2014
So the question asks us to use a sentinel value to end a program, but the sentinel value is 999, but the while loop only recognises strings...
static Scanner console = new Scanner (System.in);
public static void main (String[] args)
throws FileNotFoundException
{
PrintWriter outfFile = new PrintWriter ("Invoice.txt") ;
String firstItem;
String item ;
int price;
[Code] .....
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Mar 1, 2014
how to use the CTRL-D in my program. The program records the amount of times a positive and negative integer is typed. When the user decides to end the program, they will use the CTRL-D to terminate the program. After the button combination has been pressed, I spit out to the user the results. The problem is when I press CTRL-D the program just terminates and I can't even get it to read the next line of code. ....
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Jun 10, 2014
I'm new to Java and am trying to create a simple payroll program that uses a while loop to repeat until the user enters "Stop" for the employee's name. I've tried everything I can think of and everything others have suggested and for some reason, I cannot get the program to differentiate between the word "Stop" or any other word. what I'm doing wrong? My code is as follows:
import java.util.Scanner; // imports scanner class for user input
public class Payrolltest {
public static void main( String[] args )// begins execution of program {
Scanner input = new Scanner( System.in ); // creates a scanner to obtain user input
String Employee = "name"; // employee's name
[code]...
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Nov 28, 2014
I am working on this object oriented sentinel problem but when i am running it, its showing error.
import java.util.Scanner;
public class example1 {
private String gasmilage;
public example1(String milage){
milage=gasmilage;
[code]....
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Apr 9, 2014
Write a java program that will ask a user to input grades until the user inputs the sentinel value -1. The program should test each input to determine whether 0<=grade<=100. If the grade entered is within this range, the program should print "Grade accepted;" if not, the program should print "Invalid input".
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Mar 27, 2014
(Count positive and negative numbers and compute the average of numbers). Write a program that reads an unspecified number of integers, determines how many positive and negative values have been read, and computes the total and average of the input values (not counting zeros). Your program ends with the input 0. Display the average as a floating-point number.
I moved the different boolean statements around, but I'm not getting the sentinel value to end the run. It continues to let me add integers endlessly. The code I wrote is below:
package exerciseFourOne;
import java.util.Scanner;
public class AverageOfIntergers {
public static void main(String[] args) {
// TODO Auto-generated method stub
int positive = 0; // number of positive integers
int negative = 0; // number of negative integers
int sum = 0; // value of sum of integers
[Code] .....
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Sep 25, 2014
The program is supposed to print all even and odd numbers between 50 and 100 using ONE while or do while loop. The evens work, but the program terminates after printing 51 for the odds, which doesn't satisfy the second value sentinel value for the while loop.
public class EvenOdd {
public static void main(String args[]) {
int x = 50;
int y = 50;
int i = 0;
int j = 0;
System.out.print("Even numbers between 50 and 100: ");
[Code] ....
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Mar 16, 2014
i want create little program which enter the number, ant program says triangle exist or not. So code :
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
[code]...
So when i put first num like 1, next num like 2 and next num like 100 , program says Triangle exist.
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Apr 16, 2014
Have written a program to open Excel sheet from java program.Below line works fine.
Process p = Runtime.getRuntime().exec(new String[]{""C:Program Files (x86)Microsoft OfficeOffice12Excel.EXE"","C:UsersRASHPA~ 1.ORAAppDataLocalTempExport_xl420314062726 9379706.xls"});
But below code gives error i.e. Executable name has embedded quote, split the arguments
String path = "C:Program Files (x86)Microsoft OfficeOffice12Excel.EXE";
String file = "C:UsersRASHPA~1.ORAAppDataLocalTempEx port_xl4203140627269379706.xls";
Process p = Runtime.getRuntime().exec(new String[]{"""+path+""" + ","+file});
I am using java 1.6.
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Dec 17, 2014
In a project for school. I have a program that links several GUI's as a menu based program. What I am trying to accomplish is when one of the previous GUI's is closed that it doesn't terminate the entire program. There is a lot of classes in the entire project so I'd prefer not to paste all the code here, but if it is necessary I will do so.
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Feb 20, 2014
I'm creating a program that will compile and run another java program:Lets say I have a program in directory
D:HelloWorldsrc
and compiled program will be in
D:HelloWorldin
inside src and bin is a folder hello (that's a package)
package hello;
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello World");
System.out.println("Hello World");
}
}
This program will be run by another program (that's the program that I am creating).Here is the code of my program:
package runnercompiler;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
public final class RunnerCompiler {
[code]....
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Feb 15, 2014
I'm working in a GUI program, but I'm not going to put the code because there is a lot of code and files. Instead, I will try to put it an example.
Let say:
I'm working in a GUI program that ask form the user to enter two number's. When the user press at the calculate button. It will show up the output. However, the program won't exit unless the user press at red (X).
int x = user_Input1;
int y = user_Input2;
int total = x + y; //
JOptionPane.showMessageDialog(null, total);
I know that there will be a (total) now, so my question is here how can I reset all the calculation and have a new total that will show up when the user enter two number's again.
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Jun 18, 2014
I have searched the internet for about 2 days and now i'm posting this. I'm trying to make a program that will let me enter "1" to show how many movies I have watched and press "2" for a new one. The problem I ran into is I enter 2 then when I enter 1 it said "you have watched 0 movies". I know what the problem is I just don't know how to retype it. here is the code.
package stuff;
import java.util.*;
public class thing {
[Code].....
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Dec 14, 2014
I just finished a tutorial on youtube that covers the basic java, and now i want to try and make a game / program thing, only problem is that i have never worked with graphics before (i have tried to make ovals, rectangles, and other things with the paint method tho )
I know how to make a jframe and a jpanel, and i feel like i can make a simple "game" (not a complicated one, just a simple one with a guy walking around on the screen) in fact i have already make a such game, where you are a oval walking around on the screen, so thats not really my problem.
My problem is that i want to draw an image on the screen that can walk around instead of the oval, but how to do that. I have made a new project and set up the jframe and jpanel, and my code looks like this:
(main)
import javax.swing.JFrame;
public class main_class {
public static void main(String[] args){
JFrame f = new JFrame();
f.setTitle("title");
f.setVisible(true);
f.setSize(800,600);
[code]...
but once again, i get a blank jframe with no image and no "test" string . How i can display images on the screen?
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Feb 7, 2015
I have done a rock, paper, scissors program, but it only executes once. How do I make the program repeat so you can play multiple times?
import java.util.Scanner;
import java.util.Random;
public class RockPaperScissors {
public static void main(String[] args) {
int A;
Scanner input = new Scanner(System.in);
Random random = new Random();
[code]....
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Mar 25, 2014
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;
[code]....
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Oct 15, 2014
In this exercise you will write a program that estimates the value of π. Pretend that we are looking at a dartboard in the picture above. If the square is 2units wide and 2 units high, the radius of the circle within the square is 1 unit. Then the area of the circle is π*r2 = π*12 = π. The area of the square will be 2*2 = 4.
The estimation of π will work by randomly "throwing darts" at the dartboard. We will assume that every dart will hit the board but the location of that strike will be random so some darts will land inside the circle and some will land outside the circle. The calculation of π is then the ratio of the number of darts that land inside the circle to the total number of darts, multiplied by 4. Note that as we increase the number of darts used in the simulation, the accuracy improves.
Follow the steps to complete the program:
1.Declare variables that represent x, y coordinates of a dart, the distance of the dart from the origin, the number of darts that land inside the circle, and the total number of darts.
2.Read in the total number of darts (N) from the user and create an instance of the Random class.
3.Create a loop that runs N times. Inside the loop, you will use the nextFloat() method of the Random class to create x, y coordinates randomly, and then compute the distance of the dart from the origin. Determine whether the dart lands inside or outside of the circle.
4.Compute π using the estimation algorithm.
5.Run the program with increasing numbers from 100 to 100,000,000 and observe the accuracy of π.
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Dec 10, 2014
A file has the data of the subjects and name of professors. The file contains line for each subject. The line starts with professor Name followed by the Subject name.
Harry Williams Advanced DBMS
James H Computer Networks
Sasha Ben Artificial Intelligence
Harry Williams Software Engineering
Palbo Kastro Formal Languages
Alex W Advanced SE
James H Operating System
Harry Williams Theoretical Foundation
Write a program with setter getter method to read the file, and then write a class to store several professors in a hashset (Single Key and Multiple Values).The program should be able to display all the professors in the set and allow the user to search for a professor.
Input:
Professor Name: James H.
Then the Output will be:
Subjects Taken by the professor: Computer Networks, Operating System.Display No Classes available if the professor name does not exists .
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Aug 22, 2014
This program will compile. Yet once i run it it immediately terminates itself....
import javax.swing.*;
import javax.swing.border.*;
import java.awt.*;
public class myImageIcon extends JFrame{
[Code] .....
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Jan 15, 2015
The objective of the program: Write a method that takes a string as input and returns the letters contained in that string in sorted order as output. For example, an input of "Computer Science" would print the following as output (case is ignored): ccceeeimnoprstuthe code works otherwise
import java.util.Scanner;
public class weeklyProblem4 {
public static void main(String[] args) {
Scanner console = new Scanner (System.in);
System.out.println("This program takes a string as input and returns the letters contained in that string in sorted order as output");
System.out.println();
System.out.println("Enter some string");
String userstring = console.nextLine();
sortedString(userstring);
[code]....
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Oct 21, 2014
how to put search bar in my program.i am just new to java programming so i dont really master all the codes.i dont have much time
import java.io.*;
import java.util.Scanner;
public class myjavProject{
public static void main(String[] args)throws IOException{
PrintWriter output = null;
String ID;
String firstname;
String lastname;
String ans = "y";
String userinput;
[code]....
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Sep 4, 2014
I am new to programming and this is my first assignment. A sample of the final output is:
-"How many digits would you like to compute Pi to?" 2
-"It took 200 terms to approximate Pi as 3.136592684838816"
What I have so far, ask the user for input then stops!
import java.util.Scanner;
public class PiApproximation
{
public static void main(String[] args)
[code]...
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Mar 7, 2015
I have to create a class that asks the user to answer a multiplication problem. It randomly pulls to integers. If the answer is correct it displays a response if its wrong it displays a response and tells them to try again. at the end it displays all the questions with the answers. For some reason when i run the program it automatically terminates but doesnt give me an error.
Java Code:
import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;
//import javax.swing.*;
public class StudentMath {
[code]....
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Apr 9, 2014
use arrays to store taxpayer information. Use methods for tasks that will be repeated.
-Ask the user how many taxpayers he would like to calculate taxes for.
-Ask the user to enter each taxpayer's first name, last name gross income, and number of children.
-Each taxpayer's tax due is computed as follows
-The taxpayer's dependency exemption is determined by multiplying $3,000 times the number of children.
-The taxpayer's net income is determined by taking the taxpayer's gross income and subtracting the taxpayer's dependency exemption.
-If the taxpayer's net income is between 0 and 50,000, the tax due is 15% of net income.
-If the taxpayer's net income is greater than 50,000, the tax due is
-15% of the first 50,000 of net income PLUS
-25% of any income over 50,000
-The tax due can never be less than 0.
-If the net income is a negative number, the tax due is 0
TAXPAYER INFORMATION: output a message in one dialog box which lists the following info for every taxpayer: first name, last name, gross income, number of children, tax due.
AVERAGE TAX: output a message in a dialog box which states the average of the taxes due.
PRESIDENTAL MESSAGE: output a message in a dialog box which says either "We computed taxes for the president. " or "We did not compute taxes for the president." The president's name is Barack Obama.
Here is my code so far
import javax.swing.JOptionPane;
public class AssignmentSeven
{
public static void main (String [] args)
{
String [] taxPayers;
String[] firstName;
String [] lastName;
String message = "";
double[] grossIncome;
[code]....
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Apr 19, 2015
I need to write a program that combines everything I learned in my Java course from chapter 1-6 and 8 by Tony Gaddis at least with all the other chapters being bonus points, so I decided to write a program that tells you the binary to hex conversion or hex to ascii conversion. However I keep getting the following errors in my class, enums, and main program that I'm not sure about why. Please do not point out that the numbers in the case select are not what the hex values translate to because I know that, but I was trying to use more meaningful place holders temporarily:
These are the errors for main:
----jGRASP exec: javac BinToHex.java
BinToHex.java:9: error: cannot find symbol
Scanner keyboard = new Scanner(System.in);
^
symbol: class Scanner
location: class BinToHex
[Code] .....
3 errors
----jGRASP wedge2: exit code for process is 1.
----jGRASP: operation complete.
Because of the error in the picture attached I am unable to show the remaining errors for the class and enumsjGrasp Save error for Ascii character import enum datatype.jpg
Here is the code for main:
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.*;
/**
This program shows that you can binary to hex and hex to ascii.
*/
public class BinToHexToAscii
[Code] .....
/**
Hex value output enumerated data type
*/
enum BintoHexfinalDatatype { "0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F",
"10","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","1F",
"20","21","22","23","24","25","26","27","28","29","2A","2B","2C","2D","2E","2F",
"30","31","32","33","34","35","36","37","38","39","3A","3B","3C","3D","3E","3F",
"40","41","42","43","44","45","46","47","48","49","4A","4B","4C","4D","4E","4F",
"50","51","52","53","54","55","56","57","58","59",&quo
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Sep 10, 2014
I tried to run the program in eclipse(See Attachments 2 3 4) but I got the following errors(Attach 1), I have attached them as screen shots.
1.Errors
2. Mapper code
3. Reducer code
4. Driver
Since am new to java and hadoop, I want to know the procedure step by step in a brief manner.run this program and rest of the two statements successfully.
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