Stuck Sorting Arrays
Jul 1, 2014
Write a method called isSorted that accepts an array of real numbers as a parameter and returns true if the list is in sorted (nondecreasing) order and false otherwise. For example, if arrays named list1 and list2 store {16.1, 12.3,22.2, 14.4} and {1.5, 4.3, 7.0, 19.5, 25.1, 46.2} respectively, the calls is Sorted(list1) and isSorted(list2)should return false and true respectively. Assume the array has at least one element. A one-element array is considered
to be sorted. public class thirfd {
public static void main(String[] args) {
double[] arr1 = {16.1, 12.3,22.2, 14.4};
double[] arr2 = {1.5, 0.3, 7.0, 19.5, 25.1, 46.2};
isSorted(arr2);
System.out.println(isSorted(arr2));
[code]...
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Apr 13, 2014
I am having trouble grasping 2 dimensional arrays .I have a certain problem:
String[][] words = {
{"Red", "Blue", "Green"},
{"Orange", "Purple". "Yellow"}
[code]....
I ran the code and got OrangePurpleYellowRedBlueGreen.
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Sep 17, 2014
I'm trying to sort 10 inputted numbers (double precision) using the Array.sort() method. I can get the 10 numbers inputted, but the output is ten 0.0s; now (and this how I know I am learning some things) I'm fairly certain that the variable number is not storing the numbers inputted by the user otherwise I wild be seeing the program work correctly.
So my question is why isn't number storing the inputs?
import javax.swing.JOptionPane;
import java.util.Arrays;
public class KrisFrench3 {
public static void main(String[] args) {
double[] number = new double[10];
for(int i = 1; i <= i; i++) {
[Code] .....
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Nov 2, 2014
My code is not working properly. The ascending and descending numbers are not showing up. I believe what it is printing is the memory location. In this lab you will be coding a program that will make use of functions to search and sort an array. There will also be a print method, again complete with a full menu system. The Menu options are listed below in the section labeled menu.You will need to set up a hundred (100) position integer (int) array that is defined in main. You will also need an integer (int) variable called size. By doing this, you will have to pass the array and the size to each method you write.
Menu:
The menu should have the following eight options:
1. Fill the array with random numbers (1 -100)
2. Print the array
3. Sort the array in ascending sequence
4. Sort the array in descending sequence
5. Sequential search of the array for a
6. Binary search of the array for a target
7. Exit (this can be option zero if you prefer)
From these seven Options, one can see that six methods will be needed. Each of the six main functionalities above will need a function that does what they say. When printing the array, it is required to print the position number alongside the value. Please start your positions at zero, and not one. When doing the sorting methods, please use two different sorting algorithms. (ie, use a Min Max sort for ascending and an enhanced bubble for descending.)
For the Searching methods: you should ask for the target (number the user is searching for) in the dispatch method. Then pass the target to the search method. The search method should return the position it was found at (0 - Size) OR -1 if it was not found. Then have the appropriate messages print inside of the dispatch method.You could write another function that does this part if you wish to keep your dispatch method cleaner and more organized. But that is up to you.
import java.util.Arrays;
import java.util.Scanner;
import java.util.Random;
public class Lab9 {
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
int [] values = new int [100];
[code]....
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Mar 23, 2014
I am currently working on Project which involves me needing a BigInteger array and sorting it somehow. I have been able to do
* Array.sort(arrayname); *
In past codes, but Eclipse is telling me that I can't do this with my BigInteger array. I have already imported java.util.Arrays
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Nov 2, 2013
I need to modify modules used in the book that run a bubble sort, selection sort, and insertion sort on an integer array such that each module keeps a count of the number of swaps it makes.
How do I code for this?
Then we have to design an application that uses 3 identical arrays of at least 20 integers. That calls each module on a different array, and display the number swaps made by each algorithm.
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Jun 28, 2014
I am trying to create a java program to sort an array in ascending and descending order. Here is the program I created :
import java.util.Arrays;
import java.util.Collections;
public class ArraySort
{
public static void main(String [] args) {
int [] num = {5,9,1,65,7,8,9};
Arrays.sort(num);
[Code]...
BUT I GET THE FOLLOWING EROOR ON COMPILATION
ArraySort.java:12: error: no suitable method found for reverseOrder(int[])
Arrays.sort(num,Collections.reverseOrder(num));
^
method Collections.<T#1>reverseOrder(Comparator<T#1>) is not applicable
[Code] .....
What's wrong with my program?
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Oct 15, 2014
I am writing a program that grab user input number which represent beats per minute separated by commas. It then parses the numbers and reorders them from smallest to largest and then outputs the average, medium, maximum and minimum number all in separate lines. I am having trouble getting the array to sort the input from smallest to largest. It is currently only working for 3 numbers inputted. Anything more will not reorder it.
/*
* 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.
*/
/*
* 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 heartrate;
import java.util.Scanner;
import java.util.Arrays;
[Code] ....
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Oct 12, 2014
I am new to using arrays. I need to collect user input for book title, author, and # of pages... store that in an array... and then I'm going to need to be able to sort that array. The dialog boxes come up prompting the user for 5 sets of title, author, and # of pages, but when I try to display that information, it isn't working. I am assuming this means that it's not storing the information correctly... so I want to get this corrected before I even try to sort??
import javax.swing.*;
import java.util.*;
class LibraryBookSort
{
public static void main(String[] args)
{
LibraryBook[] someBooks = new LibraryBook[5];
[Code] ....
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Feb 12, 2014
These are all arraylists and not arrays
I have currently two arrays.
Java Code:
String[] chunks = {"a","b","c"};
int[] freq = {2,4,3}; mh_sh_highlight_all('java');
I am looking for a way to order these from greatest to smallest based on frequency.
The resulting arrays should be:
Java Code:
chunks = {"b","c","a"};
freq = {4,3,2}; mh_sh_highlight_all('java');
Because b is most frequent, and a is least frequent.
One way I can think of doing this is a two dimensional String array
Java Code: String[][] fullHold = {{"b","c","a"},{"4","3","2"}}; mh_sh_highlight_all('java');
Then sort based on the character values of the second row.
How can I sort a two dimensional array based on a single row (where it will rearrange the other rows in accordance).
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Oct 17, 2014
im having an issue with the 3rd thread that are supposed to merge the two sorted sub arrays , i pass the 2 subarrays to my runnable function sortlist and they are renamed IntSortList 1 and 2 and th1.start() and th1.join() are called and it works fine, but then i have another runnable constructor that takes IntSortList 1 and 2 but it does take a runnable. below is the code in my main,
Runnable InSortlist1 = new sortList(data2p1);
Runnable InSortlist1 = new sortList(data2p1);
Thread th1 = new Thread (IntSortlist1);
Thread th2 = new Thread (IntSortlist2);
try
{
th1.start();
th1.join();
[code]....
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Jun 28, 2014
I mainly would like to know is a int[4][4] or a int [4*4] is more efficient to use. Which takes more storage? Which requires more to process? that kind of stuff.
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May 18, 2014
I'm doing a project in netbeans. I have to make a on-line bank with all the GUI. In the middle i got stuck with the classcastexception..
public class Banca {
public static void main(String[] args) throws IOException, ClassNotFoundException {
// dati dei clienti
Anagrafica c = new Anagrafica();
[code]...
And here's the class of the activities of an account.. I'm not posting my classes Conto( Bankaccount) & Movimento (Activity) because those two already do what they should..
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Mar 16, 2014
I'm trying to do the following and my code is putting me in a loop and not allowing me to input a valid entry after using an invalid #.I ask the user for input which contains a loop if the user doesnt use the correct information, however the loop doesnt allow the user to input if the entry fails the which statement
import javax.swing.JOptionPane; // Needed for JOptionPane class
public class LoanQualifier
{
public static void main(String[] args)
{
double salary; // Annual salary
double yearsOnJob; // Years at current job
String input; // To hold string input
// Get the user's annual salary.
input = JOptionPane.showInputDialog("Enter your " +
[code]....
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Oct 6, 2014
I have this code running correctly in Eclipse all except that it seems no matter where I declare, highest, lowest, average they always seem to stay at "0". I have a feeling the location of the Initialization is not the error since I have tried moving it to inside differ loops.
Stipulations on writing this code are:
Note: You do not need to use array to save each input score for this lab. A Single loop to read in each grade, compare with the current highest grade, lowest grade, and calculate the running sum at the same time.
import java.util.Scanner;
/*Write a program that prompts the user to enter the total number of students first.
*Then ask the user to input each student’s grade and use loop statements to read in each grade.
*Check input grade to make sure 0<=grade<=100, if the user input any other number, print out warning message and ask the user to input a new grade. Display the highest score, the lowest score and the average.
*/
public class LoopStatements {
// Main Method
public static void main(String[] args) {
// Initialize
int grade = 0; // grade value
[Code] ....
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Mar 19, 2014
How to use a constructor with parameters where the user inputs the information? I'm doing a problem where I create a Delivery class that accepts arguments for the year, delivery number within the year, distance code (1 for short distance, 2 for long), and weight of package. The constructor is supposed to also determine the eight digit delivery number (combining the year and delivery number, like 20140054 for this year, package #54).
I know I'm not close to being done but I'm struck on the application with the constructor parameters. If I'm asking the user to input the information, does that mean I have to create a no argument constructor so it will compile? Right now it won't compile because it's asking for the parameters but I can't put them.
This is the class:
public class Delivery {
int year;
int delNum;
double weight;
int code;
[Code] .....
And the error is:
CreateDelivery.java:22: error: constructor Delivery in class Delivery cannot be applied to given types;
Delivery firstDelivery = new Delivery();
^
required: int,int,int,double
found: no arguments
reason: actual and formal argument lists differ in length
1 error
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Sep 26, 2014
I'm writing a temperature converter for class, and I'm done but one piece that I can't wrap my head around.My input scale radiobuttons work fine, but the output scale radiobuttons don't deselect automatically. They're two different button groups and I wrote them identical save for the variable names.
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
[code]....
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Jan 23, 2015
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JTextField;
[code]....
Total IS those numbers. But question[10] will not cooperate with me and it's getting a bit aggravating as I can't find a logical reason for it to be doing that.how to perhaps lock the value of total and sTotal after 10 button clicks from any?
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Feb 13, 2014
I have spent some time thinking about the program, and realize I need two loops-- 1 that keeps track of bricks in a row and 1 that keeps track of the number of rows as the Pyramid rises in height. The Pyramid is supposed to be centered on the bottom of the screen. Three CONSTANTS have been required:
BRICK_WIDTH=30, BRICK_HEIGHT=12, BRICKS_IN_BASE=14.
I tried breaking the scope of things down by trying step-wise refinement. But, I got bogged down. When I tried a method where both loops were included, I got limited success. For some reason, my equation to center along the x axis seems to be doubling the number of bricks. But, the correct number of total rows of bricks was a success. Also, the Pyramid was centered on the bottom of the screen. Another frustrating failure was that the number of bricks would not decrease as the new layers were created. My thought process was instead of using a loop that counts up (i++) I would use a loop that counts down (j--) which I thought would reduce the number of brick in each row as the "y" coordinate was reduced by each count of the BRICK_HEIGHT.
This is the code that "works". Whenever I add the (j--) the results are NOT what I expect.
/*
* File: Pyramid.java
* Name:
* Section Leader:
* ------------------
* This file is the starter file for the Pyramid problem.
* It includes definitions of the constants that match the sample run in the assignment,
* but you should make sure that changing these values causes the generated display to change accordingly.
*
[code].....
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Feb 18, 2014
here's my code:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class Milimetri extends JFrame {
private JPanel p1 = new JPanel(new FlowLayout(FlowLayout.LEFT));
private JPanel p2 = new JPanel(new FlowLayout(FlowLayout.LEFT));
private JPanel p3 = new JPanel(new FlowLayout(FlowLayout.LEFT));
[code]...
When i write a value in meters ..and press the button b1 to show me a value in milimeters..
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Feb 2, 2015
I am trying to make a custom table for a DB and i am stuck.
I want only the first column to have a checkbox and others not.
Is there a better way to insert the values instead using the getValueAt ?
@Override
public Object getValueAt(int row, int col)
{
if (col == 0)
[Code].....
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Nov 4, 2013
my application (java 6 RedHat 5.3 x64 ) using clean content jar for extracting data from email messages with attachments (doc, xls, ptt ...etc) After update from CleanContent-2009.1.1.jar to CleanContent-2011.1.1.jar (and any newer version) CompilerThreads will stuck in some cases (pretty often) In that case CPU usage is 100% all time, even when all activities on application are finished.
I was able to isolate several messages and every time when I used CleanContent-2009.1.1.jar it works ok but always stuck with CleanContent-2011.1.1.jar or newer versions!
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Aug 1, 2014
The goal of this code was to create a program using main method java to analysis a piece text which has been entered from a user.
They do this by entering the text into a scanner which is then analysed by the program. The analysis is to produce word frequency, for example " This is a test" produces this results:
This is a test
1 letter words: 1
2 letter words: 1
3 letter words: 0
4 letter words: 2
5 letter words: 0
The bit that I'm stuck on is producing a mean/average, My mind telling to divide
counts.length
by
str.length
But I'm not the Best at java and I've tried to implement this but all I get are errors.
Code:
import java.util.Scanner;
public class While_Loop {
public static void main (String[] args) {
while(true){
[Code] .....
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Apr 13, 2014
I think I'm about 90% complete with this program but I'm stuck on my adding entries method. It gives me a runtime error which says:
Enter the name:
Bill
Exception in thread "main" java.lang.NullPointerException
at Phonebook.addEntry(Phonebook.java:70)
at Phonebook.main(Phonebook.java:49)
Here is my code:
/*
* This program asks the user for input for a name, phone number and notes up
* to 200 entries. It stores every contact in a file. Type 'h' for help while
* running this program.
*/
import java.util.Scanner;
import java.io.*;
[code]....
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Jul 19, 2014
Basically I have a class called Book. Its supposed to have a few simple methods that set the title of the book, mark it as returned or borrowed. So specifically my problem lies in the implementation of the method that decides if the book isBorrowed. I was thinking i'd use a simple if/else statement but the way i've been trying hasn't been successful. This is what i've tried so far.
public class Book {
String title;
boolean borrowed;
boolean returned;
boolean isBorrowed;
// Creates a new Book
public Book(String bookTitle) {
[Code] .....
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Mar 14, 2014
The problem i believe is that I have the max value set to the first value given out, but every time the loop repeats the Max value gets reset to the next value in the file.
Essentially the program is supposed to read a list of credit card transactions and tell the user which transaction is the highest.
Here's the list of the sample file, note that the number of transactions could change that's why i haven't tried simply passing the values to method.
Bicycle 562.90
Groceries 138.43
Hotel 612.00
import java.io.File;
import java.io.IOException;
import java.util.Scanner;
public class CreditCards {
public static void main(String[] args) throws IOException {
String fileName = "C:/Users/David/Desktop/CreditCard.txt";
File inputFile = new File(fileName);
[Code] ....
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