Array Sorting In Ascending Order - Displaying Integers

Oct 21, 2014

I couldn't where the problem with this code. The question is : (Write a program that reads in nine integers and sorts the value in the ascending order. Next, the program restores the sorted integers in a 3 x 3 two-dimensional array and display the integers as shown in the result.) And this how i did it:

package test1;

import java.io.*;
import java.util.*;
public class test1{
public static void main(String[] args){
int[] hold = new int [9];
Scanner sc = new Scanner(System.in);
System.out.print("Enter 9 integers, press <Enter> after each");
{
for (int i = 0; i < hold.length; i++);

[Code] ....

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Array Sorting - Ascending And Descending Order

Apr 10, 2014

I am sorting an array in ascending and descending order. I am using the nethods in Arrays as below

Arrays.sort(myArray)

I want to print both input and output array in sysout.

Object[] ipArray = [45,8,32,41,11,7];
Object[] opArray;
Object mArray = ipArray;

Arrays.sort(mArray); This is changing the ipArray too ?

How can I get my input array unmodified ?

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Sorting User Input Arrays Into Ascending Order

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.

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package heartrate;
import java.util.Scanner;
import java.util.Arrays;

[Code] ....

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Numbers Inputted By User And Sorting Them Out In Ascending Order

Nov 12, 2014

I am writing a program that is supposed to take 3 numbers inputted by the user and sorting them out in an ascending order. I believe my code is correct but can't figure out why the program isn't behaving as expected.

import java.util.*; //Required to use the scanner console
public class Week3_Programming_Problem
{
static Scanner console = new Scanner(System.in); //Allows for user input

public static void main(String[] args)

[code]....

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Copying All Elements In Array A To B Sorted In Ascending Order

Apr 7, 2014

How do u copy all the elements in an array eg A into another array eg B? This is the question:

An array A contains integers that first increase in value and then decrease in value,

For example, 17 24 31 39 44 49 36 29 20 18 13

It is unknown at which point the numbers start to decrease. Write efficient code to code to copy the numbers in A to another array B so that B is sorted in ascending order. Your code must take advantage of the way the numbers are arranged in A.

This is my program:

This is the error message:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException
at java.lang.System.arraycopy(Native Method)
at Quest30.CopyAndSortArray.main(CopyAndSortArray.jav a:16)

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Display If Letters Are In Ascending Order Or Not In Ascending

Dec 22, 2014

I am trying to make a programm that reads a word and display if the letters are in ascending order or not in ascending order(All kind of letters..capitals..etc). I have made a code but its not 100% correct.

My code:

class Main
{
public static void main(String args[])
{
System.out.print( "#Enter text : " );
String text = BIO.getString();
while ( ! text.equals( "END" ) )
{
if (text.equals("END"))

[Code] ....

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Sorting Array In Alphabetical Order

Feb 3, 2015

I am trying to sort an array that I have by alphabetical order but I am having problems. Firstly the code that I have used to sort the array may not even do what I need but havn't got far enough to test it yet so go easy on me . I have read in some places when searching how to do this that I would have to create my own bubble sort in order to achieve this but I was hoping that Java had a built in sort method/function. Secondly I lack the knowledge in java to be able to assign an existing array or even a variable to the newly sorted array as I need the unsorted version with the original name and the newly sorted version as another.

code (This is not all of the code, I decided to include only what I thought was relevant):

import java.util.Arrays;
public class Sentence {
private String words[];
public Sentence(String[] words) { this.words = words; }
@Override
public String toString() {
return "Sentence{" +
"words=" + Arrays.toString(words) +

[Code] ....

Is it possible to shorten the sort function to just this?

public String sorted() {
return Arrays.sort(words);
}

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Sorting Array Of Random Integers

Dec 8, 2014

What the fastest way to sort an array of random integers. My instructor told me to look into an algorithm that uses 2n, but that is all he gave me. I am unable to find anything of the sort (pun intended there) on google, in my text, in my other java books or on here. The only thing that I have come up with are things like mergesort with the exception that the indicies of the Array have to be even. The program that I'm writing takes user input for a minimum to maximum range, the amount of numbers to fill the array in that range, and verbose.

I've tried bubbleSort but it takes forever to sort under the conditions below. I have seen a sorting algorithm that uses n (log n) but didn't really understand how that one worked.

Using the 2n algorithm, I should be able to test the range from 1 - 1000 and have it populate an array of of 1,000,000 random integers. It should be able to complete in a matter of miliseconds.

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Displaying Random Value Of Integers And Then Finding Missing Integer From Values In Array

Feb 7, 2015

I have a problem where I have to create random integers from 1 to n + 1. When the array is displayed I have to find the missing integer from the values that are displayed and show that value. I have to use O(n^2) and O(n) operations. I have created this code so far but I cannot figure out how to make my values display n + 1. It is only displaying values 1, 2, 3, 4 and 5 in random order. I also cannot figure out how to find the missing value. I have created a boolean displayed statement but can't determine how to use it in this code.

=Java
import java.util.Random;
public class Task6
{
public static void main(String[] args)
{
int[] numbers = new int[7]; //create array of numbers
Random random = new Random();
boolean displayed = false; //boolean value to determine if number was displayed

[code].... 

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Display If Letters Are In Ascending Order Or Not

Dec 22, 2014

I am trying to make a program that reads a word and display if the letters are in ascending order or not in ascending order(All kind of letters, capitals ). I have made a code but its not 100% correct. My code:

class Main
{
public static void main(String args[]) {
System.out.print( "#Enter text : " );
String text = BIO.getString();
 
[code]...

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How To Sort Scores In Ascending Order

Apr 27, 2014

I need to put my scores in ascending order how do i do that?

public static void main(String[] args) {

char[][] answers = {
{'A', 'B', 'A', 'C', 'C', 'D', 'E', 'E', 'A', 'D'},
{'D', 'B', 'A', 'B', 'C', 'A', 'E', 'E', 'A', 'D'},
{'E', 'D', 'D', 'A', 'C', 'B', 'E', 'E', 'A', 'D'},
{'C', 'B', 'A', 'E', 'D', 'C', 'E', 'E', 'A', 'D'},

[Code] ....

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How To Display Number Series In Ascending Order

Aug 9, 2014

tfrreee i want to display given series in ascending order in java prog here is an error : E:Javajdkin>java ascend 505671Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 7 at ascend.main(ascend.java:9)

Java Code:

class ascend
{
public static void main (String args[])
{
int s[]={ 50,71,81,21,7};
int i;
for(i=0;i<=s.length;i++)

[Code]...

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Putting Digits Within A Number In Ascending Order

Mar 21, 2014

For example, if i am given 9864

Imust output 4689

Without use of arrays.

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Sorting Ascending / Descending Methods Not Working On Double Linked List

Sep 12, 2014

I wrote displayAscending() and displayDescending() methods to this double linked list and it is not working at all. Logically it seems fine to me. I positioned the head in the beginning in the ascending method; created a variable named data1 as an auxiliar variable so it can store the values that are going to be moved; and moved the values. Same thing for the descending method but instead of the head I put the tail and move left the list, instead of right.

import java.util.*;
class node {
int data;
node left;
node right; 
node(int d, node l, node r) {
data = d;

[Code]...

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Sorting Runners Into Time Order Shortest First

May 5, 2014

i need to sort these runners into time order shortest first, the classes both work i just cant get the method sortRunnerList() to work

Java Code:

public class Runner implements Comparable <Runner>
{
/* static variables */
private static int nextNumber;
// To be added by students in Question 3, part (i)(a) and part(iv)(a)
/* instance variables */

private int number; // runner's number
private String name; // runner's name

[Code] .....

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Sorting Arrays In Descending Order With Collections Class

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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Reading A File / Sorting It And Displaying Its Content On Screen

Jan 19, 2014

I have a program that writes a user's input to a file.

The input consists of several loops. In each loop the user enters a student number, the student first name and last name and then several exam results. Each student has different number of exams, depend on the user input.

For instance, the input can be (explanations are in brackets but not in the actual file):

505 (student number)
efron (last name)
ben (first name)
3 (no. of exams)
88 (1st exam mark)
70 (2nd exam mark)

... and so on

I need to write a program that reads that file and writes it to the screen, but it needs to do it in ascending order according to the student number.

Leaving aside the format it will be displayed on the screen, my question is how should I sort the data by the student number?

I though about first reading each student as an array, but my problem is that each array contains different number of elements (depends on the number of exams) and also each array containד both strings (first and last names) and ints.

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Sorting Arrays - Order From Greatest To Smallest Based On Frequency

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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Sorting Rows (lower To Higher Number) From A Group Of Integers

Apr 24, 2015

I have to organize the rows from the lower to the higher number, the problem is, what I have only organizes the first 3 rows even If I insert 3,4,5...or 10 rows.

int arg[][] = {
{26, 39, 3, 13},
{22, 97, 17, 123},
{46, 19, 63, 123},
{1, 37, 90, 32},
{17, 37, 90, 32}};

for (int i = arg[0].length - 1; i >= 0; i--) {
for (int j = 0; j < i ; j++) {
for (int k = 0; k < i ; k++) {
if (arg[k][j] > arg[k][j + 1]) {
int temp = arg[k][j];

[Code] ....

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Class Defined Under Another Class - Sorting Elements In Reverse Order

Jul 4, 2014

I have never seen a class defined under another class ....

class pe{
static class pqsort implements Comparator<integer>
public into compare(Integer one,Integer two)
return two-one;
}
}

First I want to know how class pqsort is defined under class pe ....

And how the comparator used in this example is sorting elements in reverse order

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Generate 10 Random Integers / Store In Array And Then Calling A Method To Display Array

Nov 8, 2014

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");

[Code] .....

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Convert Array Of Integers To Array Of Characters And Then Print It Out

Feb 13, 2014

I have double checked this code over and over and I just can't find the problem.

What I'm trying to do is take a file and input it into an 2D array.

Ultimately, I should convert the array of integers to an array of characters, then print it out. The file contains a set of ASCII values.

After printing it out, I should then create methods to manipulate the image produced.

Using 2D arrays is a requirement for this exercise.

I think that somehow I'm overcomplicating this and the solution is a lot more simple than I think, but I can't think of what to change.

The error I am getting is:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 40
at main.main(main.java:17)

Java Code:

import java.util.*;
import java.io.*;
public class main {
public static void main(String[] args)
throws FileNotFoundException {
String[][] data = new String[22][40];

[Code] .....

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Manually Sorting Array Into Another Array

Jan 28, 2015

This piece of code i cannot change

public class Lab
{
public static void main(string args[]) {
int ar[]={7,5,2,8,4,9,6};
int sorted[]=new int[ar.length];

/// my code is right here this i can change i keep getting array required int found i'm not sure what i'm doing wrong i do know i need 2 for loops and an if statement.

[code]for(i=0;i<ar.length;i++){
for(j=i+1;j<ar.length;j++){
if(ar.length[i]>ar.length[j]
this piece of code cannot change
for(int i = 0; i<sorted.length; i++)
{
system.out.println("sorted[" + i + "] = " + sorted[i]);[/code]

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First 2 Integers Of Second Array Are Always 0?

Jan 20, 2015

import java.util.Arrays;
import javax.swing.JOptionPane;
public class Student {
public static void main(String args[]) {
String [] A =new String [4]; //krijon tabelen e emrave

[Code] ....

It Prints [firstname,secondname,thirdname,fourthname]

and [0,0,7,9]

The problem is that the first 2 integers of the second array are always 0 even if i put another grade like for example 6 or 7...

Our teacher asked to input the names and grades of the students using JOptionPane and then find the MINIMUM grade and how many times this grade is repeated...

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Sorting 2D Java Array

Sep 16, 2014

I need to sort a 2D array to look like this : [URL] ....

Here is the code that I have.

File 1:
import java.text.DecimalFormat;
public class Assignment1 {
public static void main(String[] args) {
String[][] rainArray
= {
{"January", "3.03"},

[Code] ....

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Array Sorting Using Two Different Methods

Nov 18, 2014

The following code is supposed to generate random integers and sort array1 and array2 using two different sorting methods. array1 is to be sorted with a "selection sort" method and array2 is to be sorted with the built-in Arrays.sort() method. However, array1 is the one that has a problem. It does not appear to output any values at all for array size of 4000 or more, such as array1[10000]. The assignment is to generate random integers, sort and benchmark the speeds at which array1 and array2 can generate and sort ints at array1[1000] array2[1000] array1[10000] array2[10000] array1[100000] array2[100000]

/**
*
* The following is a sorting and benchmarking program to sort
* array1 and array2 with 1,000 , 10,000 and 100,000 array sizes.
* array1 uses selection sort from section 7.4 of the book
* and array2 uses the built in Arrays.sort() method.

[code]....

I cannot post the output because the amount of data seems to have crashed the two previous posts I made on this topic due to the size of the problem.

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