Trying To Iterate Though Array To Display Value In Calculator
Apr 20, 2014
my getDisplayValue() method. I am trying to iterate though an Array to display a value in a calculator, but I doesn't work. I keep on getting these weird magical numbers at the end of the iteration. Note that this is done in BlueJ.
Calculator -> UserInterface -> CalcEngine and Calculator -> CalcEngine.
public class CalcEngine
{
//Instance variables used.
//These are all the instance variables I used to implement
//a complete calculator solution.
I have an 46x9 array. I only have 108 values in the array for which I need to perform preliminary computations. How do I get the read to only read the 108 values whose values are greater than 0 and skip the other 495 whose values are 0?
So, I am supposed to write a program that calculates the total annual compensation for a salesman using user input for the salary, sales, and commission rate (list of 3 predefined commission rates. have to display in dollar format the amount of commission and total annual salary.
CommCalc class
public class CommCalc { //attributes of class, stored data private double sales; private double salary; private double rate; //and a total field? beware stale data. //store sales argument from sales field public void setSales(double sal)
[Code] ....
I know that i have to fix some of the semantics . I have this code that I made earlier, is there an easy way to make it into a GUI interface? Or will I have to go throughthe code lines to add the JOptionPane? And I am a little confused on how to make a list (array) for the commission rate.
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?
So I need to generate 10 random integers in the range 1-20 but i have to store them in an array called numbers. Then I have to call a method called displayArray which displays the contents of the array and for the assignment i have to use a for loop to traverse the array. The method header for the displayArray method is:
public static void displayArray(int[] array)
This is what I have done
public class RandomIntegers { static int numbers = 0; public static void displayArray(int[] array) { System.out.println(numbers + "Numbers Generated");
We were given a class lab that asks us to write a program that create a multidimensional array ( 5 x 5 ), populates the array using nested loops with letter from A until Y, and displays the array to the screen. and the result should look like this:
A B C D E F G H I J K L M N O P Q R S T U V W X Y
How to write this program.. I have tried all my best but the results are not coming like this..
I would like to know how I can iterate through objects . I have a manually created linked list (without using the built-in method one). So in the memory my object looks like this(attachment).I would like to do a for loop or while loop to get each element under the test3.head.
I have used unmarshalling concept to retrieve the data elements... I have to check whether the elements satisfy few regulations when compared with data in Database. So, i thought of grouping the employees depending on EType. I have created a Map with linkedlist of employees. Say Map<String, LinkedList<Employe>>EmpMap=new Map<String, LinkedList<Employe>>();
I have already created a class named Employee which has all the setter and getter methods for employee.
Here am going to take Etype(Employee type) as key and linkedlist(list of employees of certain type) as value. How to iterate these linked lists and place them in my Map.
I facing issue with nested <c:forEach in my jsp page.I am using jstl.jar..Here is my code
in JAVA I have --> List<ProductDefViewBean> productList = new ArrayList<ProductDefViewBean>(); productList.add(objProductDefViewBean); request.setAttribute("ProductList", productList); <%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
[code]...
javax.servlet.jsp.JspTagException: Don't know how to iterate over supplied "items" in <forEach>
Requirements - Use only standard Java API and no apache file utils for this.
Most of the answers I found on the internet either dont meet this requirement or load all file names into an array which can consume too much memory when no. of files = 20,000+. how I can do this. Is there also a way to keep track of new files that were added during the execution of the loop in this code ?
I have done this before in C++ but now I want to do it in Java. I am not sure how to iterate through a ArrayList, I have look several places because lets be honest the first stop is normally google. I tried the examples but with no luck.
package org.search.BFS; import java.util.Queue; public class BFS extends Graph { private Queue<Integer> q; BFS(int s) { //mark all the vertices as not visited.
Also the below is giving me a Type safety: The expression of type ArrayList[] needs unchecked conversation to conform to ArrayList<Integer>[]
I have a JSP code which will open the contents of a excel file.
Now i need this contents of the excel file to be added dynamically to a table in the sameJSP. How to proceed.At the maximum 10 rows can be added dynamically.
Assuming i have a table in JSP which has heading first name,last name,DOB and Gender. After opening the excel through JSP the contents needs to be iterated and added to the columns mentioned.
Is there anyway to iterate an enum type without an instance. As some context, consider the following code:
Java Code: public interface GenericChecker { public bool isValid(String str); } mh_sh_highlight_all('java'); Java Code: public class EnumChecker<T extends Enum<T> > extends GenericChecker { private Class<T> enumType; //No instance
[code]....
toString method of the enum types has been overridden so that it returns the name assigned to the enum rather than the enum name itself. For example an enum might be SOME_ENUM("Assigned name"), therefore toString returns "Assigned name" rather than "SOME_ENUM". The idea is that a field from a table can be handed to the isValid(String) function on the GenericChecker base, and the derived class will then check to see if the field matches valid data as far as it is concerned.Thus, I can create a whole bunch of checkers easliy:
I am learning iterating through lists. What I have so far is two Hash Sets and two Tree sets. Hash Set 1 and Tree set 1 include the words from Roughing it by Mark Twain. Hash set 2 and tree set 2 include the words from Adventures of Huckleberry Finn by Mark Twain. (Everything is read from a file I made).
I am stuck trying to find out how to "Iterate through the words in HashSet1 and search for these words in both TreeSet2 and in HashSet2".Here is my code:
public class UsingSets { public static void main(String[] args) throws FileNotFoundException { String riHashIterator = null; HashSet<String> riHash = new HashSet<>(); Scanner input = new Scanner(new File("roughingit.txt")); while(input.hasNext()){ String riHashWords = input.next(); riHashWords = riHashWords.toLowerCase(); riHash.add(riHashWords);
and, have a response class file, which is setting a response from database to display it on `JSP` file. The value that I am getting from database is in the form of `code` or `integer`. I needed to have that value from the database and before setting the response I need to use `getProperty(code)` and save the String representation of that code into a new list and then pass that list to `setResponse`. For e.g: This is the value I am getting from database:
col1 | col2 | col3 | 1 helo done
I needed to show on my JSP page as:
col1 | col2 | col3 | USA helo done
I was following this tutorial [URL].... but not able to exactly understand how to achieve the same.
This is my `DAOImpl` where I needed to `iterate` and save the `mapped key-value` in a new list and then pass to `JSP` page
public class CountDAOImpl implements IDataDAO { private Connection conn = null; private Statement statement = null; private ResultSet rs = null; private List<String> country_code = new LinkedList<String>();
I am currently working on a Java project, below are my attempts at coding so far:
public class MyZoo { // zoo identifier private String zooId; // a number used in generating a unique identifier for the next animal to be added to the zoo private int nextAnimalIdNumber; // zstorage for the Animal objects private TreeMap<String, Animal> animals;
[Code] ....
I currently cannot get the printAllAnimals() method to work as it should.
When executing the method printAllAnimals(), it does not do anything, when it is supposed to use the Collection object c, so that animals stored in the zoo can easily be checked.
How can I read a text file present in my local directory say (C://test.txt) , iterate and populate the values of test.txt into a text area of the JSP page?
Contents in the test.txt file: username:test password:test123 domain:test321 DBname:testDB
I have to write a program that calculates the average temperature for a month using parallel arrays (it is mandatory to use a parallel array). I'm new to Java (I'm more familiar with C++) so I get confused with the use of methods. I know how to compute the averages already, I just setting up the parallel arrays. This is what I have so far:
Java Code:
import javax.swing.*; import java.util.Scanner; public class Temperature { public static void main(String[] args) { String[] day = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"}; int[] temp = new int [7];
[Code] .....
For now I just want to show the contents in my array before I start computing averages.
I am having the hardest time trying to figure out how to display an array in a 1-window GUI.
I can display 1 book separately, by basically ignoring the array and creating a new object for each book, but I need all 5 books to display in one window, and that's where I'm lost. I'd really like to use the arrayI built to generate the books in the GUI. The information of each book appearing horizontally, and the different books appearing vertically.
// Bookstore.java // This program displays information on multiple books
So in my code, I have the user input a number, and the program will then display that element in the array (I've done this bit). However I need to write code to check that the user is entering a valid index number, and if they don't, I need to prompt them that the number they have entered is incorrect and let them retry, and I don't know how to.
This is my full code, I have added a comment underneath where I need to add the code:
import java.util.Arrays; import java.util.Scanner; public class StudentNames { public static void main(String[] args) { String[] names = new String[8]; Scanner s = new Scanner(System.in); for (int i = 0; i < 8; i++) {
