Making Time Calculator Work / Modulo Division Not Working
Oct 22, 2014
Prompt for the project is "Write a program that will ask the user for a number of seconds and output the equivalent period of time in days, hours, minutes, and seconds.The program should:
-Use modulo division to calculate the number of days, hours, and minutes.
-Use compound operators when making assignments.
-Proper formatting and use of comments
-Symbolic constants defined as the number of seconds in a minute, hour, and day.
For example: final int sec_in_min = 60;"
public class Mod1
{
public static void main (String[] args)
{
int sec, min, hr, day;
final int SEC_IN_MIN = 60;
final int SEC_IN_HR = 60 * 60;
final int SEC_IN_DAY = 60 * 60 * 24;
I am having problems with my code I have added the multiplication and division but they will not display also how can I correct any error when dividing by zero?
import java.awt.*; import java.awt.event.*; public class calculator2 extends java.applet.Applet implements ActionListener { TextField txtTotal = new TextField(""); Button button[] = new Button[10];
I was trying to execute the following program and the multiplication worked but the division didn't work.
import java.util.Scanner; public class BodyMassIndex { public static void main(String[] args) { // Prompt the user for weight and height // Create a scanner Scanner input = new Scanner (System.in); System.out.println("Please enter your weight in pounds"); int weight = input.nextInt(); System.out.println("Please enter your height in inches"); int height = input.nextInt (); double BMI = weight * (0.45359237)/ (height * 0.0254)*(height * 0.0254); // the weight * (0.45359237) executed but it wasn't divided by (height * 0.0254)*(height * 0.0254) System.out.println ("Your BMI is "+BMI);
I'm working on a homeowork assignment here URL... and I can't get the graph to work correctly. I'm not really sure how to print the string of names, gender and rank at the point on the graph. Also I'm just wondering if I set up the scanner to find names right.
import java.util.*; import java.io.*; import java.awt.*; public class Names { public static final int year = 1880; public static final int decades = 14; public static final int decadeWidth = 70;
My program has just "File" and "Help" in the menubar when "File" is clicked, there is an exit item that closes when clicked.i want the "About" item in "Help" to open a new window, what's wrong with my code?here is it:
How can I make the numbers to stay at the textfield of my calculator instead of disappear like when I type 1 then hit the + sign the number 1 disappears from the textfield I would like to have this (1+1) showing in the text field and also if try to press only + , * , - , / to show error.
Now my issue is I have a JTable. The first column will contain Date objects all the way to the bottom. I want the JTable to display only the month and year. I created a custom cell renderer, but it appears the cell renderer method "getTableCellRendererComponent" is never called. (I tested it using System.out.println();) Here is my code for setting the cell renderer and the contents of the first column:
MonthYearTableCellRenderer renderer = new MonthYearTableCellRenderer(); tblView.setDefaultRenderer(Date.class, renderer); for(int i = 0; i < 60; i++){ Calendar cal = Calendar.getInstance(); cal.set(Calendar.DAY_OF_MONTH, 1); cal.add(Calendar.MONTH, i); tableModel.setValueAt(cal.getTime(), i, 0); }
The Date objects are set into the cells of column 0 correctly. The table shows the result of the "toString()" method for each cell in that column.
import java.io.*; public class workhours{ public static void main (String args[]){ try{ BufferedReader breader=new BufferedReader(new InputStreamReader(System.in)); String days[]={"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
import javax.swing.*; import java.awt.MenuBar; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class NewCalculator implements ActionListener { //assign button clicked number and answer onto variables.
[Code] .....
Also what is the code I need to use to do the percentage and square root calculation in the calculation. Cos I am not sure about the sign I am required to use to do the calculation.
The if statement is where the code to make the clear button (C and CE) work.
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'm doing project in area of "Cryptography and Network security". I'm having a file with binary Unicode (mean file contain Unicode value of corresponding data (text file)), want to divide that as blocks with the size of 144bits.
Here is the Butterfly sub division technique which refines the mesh of a STL file.I have to prepare a java code based on this technique, give the step by step procedure or algorithm for this.(files attached)
The challenge is to weed out all the prime numbers without using any kind of division (%, /). My code doesn't weed out certain numbers, such as many multiples of 5, the number 49, etc, and I am not sure why. Here is my code.
My logic for the for loops was this: Starting with the upper numbers of the ArrayList, find every number that is a multiple of that number and remove it from the ArrayList. Every time you find a multiple, increase the variable multiply, so the program knows what the next multiple to look for.
// program doesn't work yet. import java.util.ArrayList; // import java.util.ListIterator;
public class Sieve2 { public static void main(String[] args) { int upperLimit = 55; ArrayList<Integer> primes = new ArrayList<Integer>();
I am working on an assignment that I can't seem to figure out the final part to. The program takes in course data such as the time the class starts and how long it lasts. The time is in military time (0000 - 2400)
I need the output time to be the time the class started, plus the length of the class, and displayed in military time.
I can't for the life of me figure out how to do this. I have gotten a program that works for this time and minutes, and displays the correct 1020. But when I change the information to say
Start time: 0700 Length = 90 minutes
I get:
Endtime = 90
90 is technically correct, the way the formula is setup, but I need it to display 0900 not 90.
Here is the code that I have. Be easy, I'm still learning, and this is just the file I created to get the formula to work. Also, the verbose in here is just for my own debugging to make sure values should be what I'm expecting them to be.
public class calc { public static void main(String[] args) { double hours, minutes, length; double temp; int time = 2400; hours = time / 100; System.out.println("Hours are: " + hours);
I have two classes. time_runner is used for testing my code.
This is what I'm using to test my code:
class time_runner { public static void main(String str[]) throws IOException { Time time1 = new Time(14, 56); System.out.println("time1: " + time1); System.out.println("convert time1 to standard time: " + time1.convert()); System.out.println("time1: " + time1); System.out.print("increment time1 five times: "); time1.increment();
[code]....
The two constructors are "Time()", which is the default constructor that sets the time to 1200, and "Time(int h, int m)" Which says If h is between 1 and 23 inclusive, set the hour to h. Otherwise, set the hour to 0. If m is between 0 and 59 inclusive, set the minutes to m. Otherwise, set the minutes to 0. Those are my two constructors that I pretty much have down. The three methods however I'm having trouble with. The "String toString()" Returns the time as a String of length 4. The "String convert()" Returns the time as a String converted from military time to standard time. The "void increment()" Advances the time by one minute.
public class Time { private int hour; private int minute; public Time(int h, int m) { if(h > 1 && h < 23) hour = h;
I am developing an application to share my client screen with server, it is working well on swing. But i want to develop as web application, i am trying to using applet. But i am facing the fallowing problem..,
1) The Applet screen also open and project also running well on server mechine. But unable to see the client screen on the server.
2) The problem may be to display the JDesktopPane or JInternalFrame.
My working Server Code extends withe JFrame..Java Code:
how this is done using session.setMaxInactiveInterval(); at first, i did not set anything but it expires anyway.so i'm trying not to let the session expire.session.setMaxInactiveInterval(0) does not work.
I'm making an import/export of xml - I have the import of xml sorted I'm just trying to finish off the export. My export class is called XmlWriter.java. Inside the class I have an updateFile method to update an xml file as such:
public void updateFile(Environment environment,Document doc) { // code }
I then in my main method have
public static void main(String argv[]){ //declare new object of class XmlWriter xmlWriter = new XmlWriter(); //test testUpdate method // xmlWriter.testUpdate(); Environment environment = ;
[code]....
I don't know what to make my variables equal to - eclipse keeps trying to use null but obviously that won't work. The Environment is another class that just contains getters and setters for the 3 different databases (that are in the xml file) and the getter/setter for the environment ID (also in xml file).
How can I make an .exe file for my java project that will work on every computer?
I have a jar file, but the project can not work without installed IntellyJ or other development environment on that computer, i.e. it doesn't work only with installed java runtime.
What can I do to make an .exe file for my java project?
