Area Calculator - How To Move All Input / Output To Main
Nov 11, 2014
I am stuck on one of the projects: Area Calculator
I am able to code an area calc that works, but am unsure how to move all the input/output to main like the project wants. here is a piece of my code so far:
I have the same thing for rectangle, square, and circle (of course with the correct formulas) and the program works perfect, but the assignment is still wrong until I can move the input/output to main. what do I do?
how to put the output the the text area this is the code .
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package interns; /** * * @author JosephP */ import javax.swing.*; import java.awt.event.*; import java.awt.*;
Here is my code. Basically a trigonometry calculator (I hope).
import java.util.Scanner; public class first { public static void main(String[] args){ Scanner in = new Scanner(System.in); double hy; System.out.println("Please enter length of hypotenuse:"); hy = in.nextDouble(); double op;
[Code] ....
My input:
Please enter length of hypotenuse: 20 Please enter length of opposite: 10 Please enter length of adjacent: 15 Which value would you like to calculate? (sinA, cosB or tanC) sinA Please enter one of the options.
It runs and everything is fine, just that the if statement seems to get skipped over and direct straight to the else and I'm not sure why.
This shows a nice text area and an input field underneath it.The getGameHistory() method just returns a long string detailing the current game.Is there a way of just showing the text area without the input field underneath?Can the text area also be used for input instead?
I am new to java and I have this assignment that I started but I am now stuck . The instructions are:
Create an ElapsedTimeCalculator class that computes the amount of time that passes between a starting time and an ending time, in military format.
For example, suppose the two times are 1445 and 1730. Then the program output should look something like this:
Start time:1445 End time: 1730
Exactly 2 hour(s) and 45 minute(s) have passed.
Total elapsed time in minutes:165 Total elapsed time in hours:2.75
ElapsedTimeCalculator Class Specifications:
1.Your class will have a constructor that takes two parameters: the starting time and the ending time in military format
2.Your class will also have these methods:
-Get method to return the starting and ending times -Set method that resets the starting and ending times to values passed as parameters -a method that returns the hour portion of the elapsed time -a method that returns the minute portion of the elapsed time -a method that returns the total elapsed time in minutes -a method that returns the total elapsed time in hours
Now here below you can see what I have so far...
public class ElapsedTimeCalculator { private int startTime, endTime; private int hours; private int minutes; private int seconds; //constructor ElapsedTimeCalculator(int start, int end)
[Code] ....
I don't have any errors so far, I am more stuck on how to begin a method that returns the hour, minute, etc.. (the third bullet).
I am trying to write a program that will generate a QR Code from an input text and also display some information about the input/output bits. So far I have created the frame and what to do next. And I'm not sure if I am on the right track since my level of programming is not that great. By the way, I am using zxing libraries from GitHub. I know, there are plenty of generators online for the QR Code, but that is not what I am looking for. As you can see on the attached image, I am more interested in the efficiency of encoding 2D data. Also, I noticed that almost all the online projects regarding 2D codes are for Android. Which is not very useful.
Create a program to input the length and width of a rectangle and calculate and print the perimeter and area of the rectangle. To do this you will need to write a Rectangle class and a separate runner class. Your program should include instance variables, constructors, an area method, a perimeter method, a toString method, accessor and mutator methods, and user input. Your runner class should include 3 Rectangle objects. One default rectangle, one coded rectangle, and one user input rectangle. All methods should be tested in the runner class.
This is my code:
import java.util.Scanner; public class Rectangle { double length; double width; public Rectangle() {
[Code] ...
What have I done??? I have created this program using the few different resources with which I am supplied, but I don't understand the resources.
I am working on a personal project and want to create a text editor to write my code. I am wondering how could I read the last input from the user and if say it was an open curly brace {, then like netbean's my editor will supply the closing curly brace. My java experience is limited but I have tried to read key board input and a few other options that did not work.
The problem I'm trying to resolve now is getting my ActionEvent to send the value input in the JTextArea out to be calculated, then to display the result in my result JLabel.
Here is an image of the GUI :
The basic procedure the teacher is asking for is the user is supposed to enter a temperature in the input. The user then clicks the input scale, and then on the output scale selection the converted value is to be displayed in the output area.
As I mentioned my problem is in the sending of the input value to my calculation area, and getting the value to display in the JLabel.
How should I approach this solution? Do I need to have a listener after the JTextArea of the input box? Will that allow me to limit the input values to numbers only?
final JTextArea inputText = new JTextArea("" + (char)176,1,4); //ReadConsole equivalent to specific input was a number?
Here is the section of code my ActionListener is:
//celOut represents the Celcius output scale JRadioButton. celOut.addActionListener (new ActionListener () {
@Override public void actionPerformed(ActionEvent e) { //if the Celcius Input Scale is selected. if(cel.isSelected())
[Code] ....
All the calculations are required to occur in a separate java file, which what I think is tripping me up. How do I send a value from the JTextArea into the Calc.celToFahr method?
//contents of my Calc.java calculation class. public class Calc { public static double celToFahr(double cel){ return cel * (9./5.) + 32.; } public static double fahrToCel(double fahr){ return (fahr - 32.)*(5./9.); } }
I am currently working on a small java programm. I use netbeans for it. And obviously I am new to java.
Basically its a calculator that change the input value into another value: like 10 € into whatever $ and same with Inch and Centimeters.
Therefore I need a second jDialog Form where i can change the factors for the calculator and start the calculator again.
Here is my problem: I can open the second Dialog but if I want to change the factor it doesn't change the value in the variable and the second calculator frame is with the old factors. It seems the double variable isn't working globally
How do I make the file reader object move to the next line if there is no more input on the line. Here is my text and output file as you can see that my text file column cuts off on the 2nd line after 70. I want to read that next line which is 100 into my labs variable however its reading it into my final exams variable. I'll also post the code but I didn't think it was necessary.
textfile: 100908095 1008070 10070
output: Labs Projects Tests Final Exams 100908095 1008070100 70
[import java.util.Scanner; import java.io.*; public class MyGrades { public static void main (String[] args) throws IOException { int lab, project, test; int finalExam;//Par and Player values
import java.util.*; public class CalculatorProjectVincent { public static void main(String[] args) { System.out.println("Welcome to this incredibly uneeded and redundant calculator program!");
breaker(); Scanner kb = new Scanner(System.in); System.out.print("Enter an expression or EXIT to end the program. > ");
[Code] ....
When I run the program and input "v 100", it gives me the following:
----jGRASP exec: java CalculatorProjectVincent
Welcome to this incredibly uneeded and redundant calculator program! - - - - - - - - - - Enter an expression or EXIT to end the program. > v 100 Exception in thread "main" java.util.InputMismatchException at java.util.Scanner.throwFor(Scanner.java:909) at java.util.Scanner.next(Scanner.java:1530)
How would I display certain output text if the text entered equaled "text".
So lets say you enter a question into a JTextField. You press a button that submits the text. The output displayed depends on what the question you asked was.
Think about it as "If question = What color is the sky? On submit, display text "Blue". How to implement this.
What are formatted input & output in Java? I want to know the difference between general "input & output" & "formatted input & output"? And what is the reason of the naming it as formatted.
Here is my code so far. I am trying to get the WHILE LOOP to work so the user inputs a number, the if statement prints the output and then it returns to ask for another number and goes again and again looping :
import java.util.Scanner; public class ifwhileloop { static Scanner sc = new Scanner(System.in); public static void main(String[] args) { double nmbr;
I want to do basic input/output using Process class. I basically wish that, I should ask user his name and when user provides his name then I would print "Hello '[name]'"
import java.io.*; public class ReadAndPrintName { static Process p;
When input validation for the first months rainfall is non-negative, this results in correct average rainfall.
When input validation is used for the first months rainfall I'm prompted to input a positive number, which is 2.
When asked to input rainfall, in inches, for each month, I begin with input -3, I am again prompted to re-enter a positive, I enter 3. What happens is, whichever positive integer I input after I had entered a negative for the first months rainfall, the average would be off by the positive number inputted.
package averagerainfall; import java.util.Scanner; public class AverageRainfall { public static void main(String[] args) { int maxYears; int totalMonths;
I am trying to create a program for my class that requires the input of a letter and the output of whether or not it is a vowel or a consonant. I am using eclipse, it is giving me no errors, but when entering the letter i get an error in the console
import java.util.Scanner; public class w0571505_a2a { private static Scanner a; public static void main(String[] args) { // enter letter System.out.println("Enter a Lowercase Letter");
I am trying to write a program in Java that uses threads.Below is the program requirements:The goal of this assignment is to create a routine which creates multiple threads, has them do work in parallel, and terminates when the last thread has finished.
The Scenario: There are several groups of people in a bar watching the Olympics cheering for their country. Each group will cheer for their country some given number of times, with a random pause (between 2 and 5 seconds) between each cheer. There is enough room at the bar for up to ten different groups to sit (each would be cheering for a different country).
The Program: The task is to write a program that will simulate these cheers using threads. The program should be called cheer.X (X being the language of choice). You may use any language that supports threading. When the program is run it should ask for the number of countries and then the name and how many times it will be cheered for. The main function will then create a thread for each team and each thread is responsible for cheering the specified number of times for the correct team at the random interval. You will submit the proper source code file for me to open and compile myself, not an executable.
An example run would look something like this: How many countries are supported at the bar? 3 Enter the first: China How many cheers? 2 Enter the second: USA How many cheers? 4 Enter the third: Russia
package core; import java.util.ArrayList; import org.lwjgl.input.Keyboard; public class Input{ public static final int num_key = 78; private static ArrayList<Integer> currrentkeys = new ArrayList<Integer>(); private static ArrayList<Integer> downkeys= new ArrayList<Integer>(); private static ArrayList<Integer> upkeys = new ArrayList<Integer>();
My program is user input 20 char and the program will print the most common. So I use another int arr which count the number appears in the original array. i know its not so Effective but I don't know why it run but it stop in the middle. I got this code :
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 20 at Ex2.common(Ex2.java:39) at Ex2.main(Ex2.java:23)
import java.util.Scanner; class Ex2 { public static void main(String[] arg) { Scanner reader = new Scanner (System.in); char[] arr=new char[20]; System.out.println("Please enter 20 chars:"); for (int i=0;i<20;i++)
I am trying to learn how to use file input/output in addition to exception handling... The problem is my textbook wrote this chapter for a version of Java that hasn't come out yet, so everything I do "according to the textbook" doesn't work. any feedback on correcting these exception errors because I am not sure what is causing them or how to fix them.
I was able to have it display the name of the book in the Book.txt file, but when I added the second part if the file doesn't exist, that's when the errors came up and it wouldn't compile.
import java.io.*; import java.util.*; public class DisplayBook { public static void main(String[] args) { try { File book = new File("Book.txt"); FileInputStream in = new FileInputStream(book);
[Code]...
These are the compilation error messages I am receiving: (I have managed to get it down from 7 errors to just 4, but now I'm stuck)
DisplayBook.java:15: error: unreported exception IOException; must be caught or declared to be thrown while ((letter = in.read()) != -1) //if file exists, displays book title ^ DisplayBook.java:24: error: unreported exception FileNotFoundException; must be caught or declared to be thrown
I'm using one method to take input from the user and append some text to it, then I am trying to return the value of the variable and use another method to print it out. But for some reason whenever I try doing this I can't print out anything and I only get a "null" output. Why this is happening?
package Homework3; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Homework3 {
