public class ThreeStackArray
{
static int row = 10;
static int col = 2;
int[][] stack = new int[row][col];
//place numbers into the first row of array
public void push(int num)
[Code] .....
I found this program idea online. Make a array with three stacks. Either I jump out of bounds if I use "continue" instead of "break" in my loop in the push method. If I use break the output looks like:
12900
0000
0000
0000
0000
if I use continue the output looks like:
An error has occured java.lang.ArrayIndexOutOfBoundsException: 2
1212
1212
1212
1212
1210
When I insert: title, category, year, artist in 4 Strings And when I press "enter" i put those 4 in a array "large", and then when I can start a new music insert with 4 new string elements and add those in the large array..So: I have an array "large" with the length 19 (or so..)(max ~100 or so)Then I what to: get,in a new array "title",the elements:0,4,8,12,16 (from the large array) and put them in a scrollable list. And when I select one element in the title array I then whant to get 3 remaining elements from this. And put it in a array called selection.
So the "large" and the "title" arrays must be dynamically sizes... or be copied to a larger sized..
1 can it be done with arrays? 2 how do dynamically change the size of for example the array "title"? 3 how do I receive the elements 0,4,8,12,16 and so on, (to ( large.length-3) and add it to the title array?
So we have to ask the user to put in a string of letters, and bring those letters in as cars to where there is a storage area and an assembly area, and we have to sort them from there into the assembly area with the smallest (A) at the head. I think I set up my code pretty well, but when I run it, no matter what I put in it returns CBAo. Say I input KATE, it should return TKEA but instead CBAo or if I input JANICE it should return NJIECA but it just returns EDCBAo. Here's my code:
import java.util.Scanner; import java.util.Stack; public class carStacksDessart { public static void main(String[] args) { Stack<Integer> storage = new Stack();
I am having some trouble with this program. I am getting only one result to print when it should show all the solutions. Also the 1 solution I am getting is only printing 7 queens not 8.
import java.util.Stack; public class Queen1 { boolean conflict, complete = false; public int solve(int n) { //create a stack //each element stores the position of the queen on a different row Stack<Integer> s = new Stack<Integer> ();
I am trying to write a program that checks for parentheses matching using stacks.This is my ArrayStack class.
public class ArrayStack{ private final int DEFAULT_SIZE=10; public int tos; Object[] array; public ArrayStack(){ array=new Object[DEFAULT_SIZE];
[Code] ....
But the problem is when I compile matching I get an error as unreported exception EmptyStackException.must be caught or declared to be thrown. I think the problem is with exceptions which I don't have a good knowledge of.
I'm supposed to use stacks (implemented with an array) to check to see if a string is a palindrome. I've finished all my classes and methods, but I'm getting an ArrayIndexOutOfBoundsException when I try to run my demo program.Here are my classes:
public interface Stack { // Creates an empty stack public void initializeStack() // Returns true if the stack is empty, returns false otherwise public boolean isEmpty(); // The stack can never be full, so always return false public boolean isFullStack();
I'm getting errors on all the exceptions called EmptyCollectionException. I think this is because the import statement has a error on it but I'm not sure. I'm suppose to add methods for peek, isEmpty, size, and toString methods. I only started isEmpty also am wondering what I have to change from peek method if anything at all.
import jsjf.exceptions.*;//Error on jsjf import java.util.Arrays; public class ArrayStack<T> implements StackADT <T> { //Error on StackADT private final static int DEFAULT_CAPACITY = 100; private int top; private T[] stack;
I am doing a calculator using stacks but when i try to calculate I getting the wrong data example stack contains 8 and user enter -3 stack should change to 5.
I am given the task to create a program that evaluates infix expressions using two generic stacks, one operator stack and one value stack.
This is my GenStack.java file:
import java.util.*; public class GenStack<T>{//T is the type parameter private Node top;//top of stack public class Node {//defines each node of stack T value; Node next;
[Code] ....
I'm having trouble with the eval and apply methods. The eval method doesn't appear to pickup ')' characters, like it doesn't even see them.
I made a method which takes values from a data set and finds out which one is the highest value. When it finds the highest value, it returns the country which is associated with the value. Here's the data set.
"Country""Total CO2 2005 (million tonnes)""Road CO2 (million tonnes)""Road CO2 per person (tonnes)""Cars per 1000 people" 10 USA5951.131530.35.16777 UK2573.4119.681.99470 Italy476.08116.862592 Germany841.78150.211.82550 Canada553.02123.423.82562 France414.03128.132.04477 Russia1575.44114.690.8178 Japan1254.47224.241.76447 China5100.6228.020.317 India1147.4691.060.18
So if the number was 5951.13 then the program would return USA. How do I do that? I've already started on trying to get this code to work but it doesn't seem to compiler so what's wrong with it?
public static CO2Data highest (CO2Data [] arr2){ Scanner sc = new Scanner(System.in); CO2Data highestindex = arr2[0]; CO2Data currentcountry = arr2[0].getCountry(sc.nextLine());
[Code] ....
Also the array is a CO2Data array which is part of the following class:
public class CO2Data { //The CO2Data class will be called in other methods
private String country; //A private variable will prevent other users from accessing and changing these variables.
private double totalCO2; private double roadCO2; private double CO2PerPerson; private int carsPerPerson; public CO2Data() { country = "";//this sets the initial values for the different variables
I can now call the DB on the query I want and return results. What I know want to do is build an array of the data, forward it to the JSP page and display the bits individually.
I'm studying about arrays and I have some questions:
First, is there any difference between these two?
Java Code:
int x[] = new int[3]; int[] x = new int[3]; mh_sh_highlight_all('java');
It seems to me when I try them they do exactly the same, is that correct?
Second, more important question. If I want to make an int variable that refers to the index number of an array, how do I write? For example if we have
Java Code: String[] string = new String[10]; mh_sh_highlight_all('java');
And I want to have a variable "int n" that refers to an index number, so that if I set n = 5 then string[5] is selected. Note that the int n is NOT an array, but just a regular integer variable. How can I do that?
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
So I am supposed to be changing infix notation to postfix notation using stacks. This is simply taking a string "3 + 5 * 6" (infix) and turning it into (3 5 6 * +" (postfix).
To do this, we are to scan the string from left to right and when we encounter a number, we just add it to the final string, but when we encounter an operand, we throw it on the stack. Then if the next operand has a higher input precedence than the stack precedence of the operator on the top of the stack, we add that operator to the stack too, otherwise we pop from the stack THEN add the new operator.
I am supposed to be utilizing a hash map but I don't see how you would go about doing this. We are supposed to store operators on the hash map but operators need their own character, input precedence, stack precedence, and rank. How do you use a hash map when you need to tie a character to 3 values instead of just 1? I just don't get it.
The following is our Operator class that we are to use. Another problem is this isn't really supposed to be modified, yet we were given two important variables (inputPrecedence and outputPrecedence) that we can't have nothing to be initialized to and no way of accessing? So that might be where a hash map comes in but I am not sure. I am not very sure on how they exactly work anyway...
public class Operator implements Comparable<Operator> { public char operator; // operator privateint inputPrecedence; // input precedence of operator in the range [0, 5] privateint stackPrecedence; // stack precedence of operator in the range [-1, 3]
[Code] ....
So my question mostly revolves around how I tie an Operator character to its required values, so I can use it in my code to test two operators precedence values.
My original thought was turn string into character array, but then I would need nested for/while loops to check if it is a number or letter, or if it is an operator and thus result in O(n^2) time
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);
I first learned how to program with BYOB. In BYOB there were variables and lists. Variables worked the same as Java and lists were groups of variables. To create a list, I would give it a name. I could then add variables to this list as items throughout the program. Here's an example of what a list would look like:
[[List]] item 1: Hello item 2: world
I could then call upon item 1 or item 2 and delete them if needed. In Java, I want to have 3 lists of variables into which I put user input as variables. The code would look something like the following: (stuff with "//" at the end is detailing what I want to do, not actual working code)
import java.util.*; public class Archives { public static void main(String[] args) { Scanner input = new Scanner(System.in);
