Java Merge Sort Not Working

Dec 10, 2014

I have been working on getting the merge sort working, I have a complteted code but am not getting the right results... Here is my code and the results are "876323149" ...

public class MergeSort
{
private static int[] local; // for use in copying
private static int[] a;
public static void main(String[] args) {
int[] test = {2,3,1,4,7,8,6,3,9};

[Code] ....

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Merge Sort Java And Linked List?

Dec 11, 2014

I've playing around with linked lists and methods for sorting. So far I've tested the iterative sort, insertion sort, quick sort and they all worked perfectly. Now, I am trying to implement merge sort that would take a linked list of jobs and sort them according to their priority. I found a few solutions on the web, of which I am trying to implemented this one: LeetCode.

My system is a simple one, I do have a linked list of print jobs, each of which has the priority. The following code should sort my print queue and return the link node of the first sorted element. Here's the code.

//defining a job that has priority
public class Job {
private int priority;

[Code]....

The problem I've been trying to solve is that I am getting the stack overflow at line

ListNode<T> h1 = mergeSort(left);

meaning that I am getting into a loop somewhere down through the process of breaking the linked list into half, half or halfs and so on.

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Mar 2, 2015

How do i make this merge sort take on random numbers in an array instead of hard coding the numbers

Integer [] a = {8, 2, 6, 7, 5, 4, 3, 1};
mergeSort(a);
System.out.println(Arrays.toString(a));
}
public static void mergeSort (Comparable [] a){

[code]....

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Jun 15, 2014

Merge sort implementation on the given array i listed in the code below. I know Arrays.sort() or Collections.sort() could do the trick but i want to achieve it through merge sort.

import java.util.*;
public class Merge{
public static void main(String[] args){
String[] myStringArray=new String[]{"z","a","z","b","c","e","z","f"
,"g","a","w","d","m" ,"x","a","R"
,"q","r","y","w","j","a","v","z","b"};
}
}

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Apr 10, 2014

I am new in java.. I am having a problem when doing merge sort. This is my coding...

Java Code:

import java.util.*;
public class Person
{
public static void main(String[] args)
{
String[] list = {"

[Code] ....

the error is incompatible type at 'sorted = merge(left,right);'

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Mar 31, 2014

I'm having a problem printing out the descending order of my array. The array order goes like (Title,Studio,Year). I try to create to ints with the compareTo method but when the program is run the I get array out of bounds. Could the answer possibly be that in order not not have the out of bounds error, to create a for loop inside of the while?

public class Movie2
{
// instance variables
private int year;
private String Title;
private String Studio;

[code]...

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Mar 16, 2014

Suppose i have written a method like this

public void myWork(){
mergeSortMyData(); O(nlgn)
....
someProcessing(); O(n^2)
someprocessing2(); O(n^2)
}

then what will be time complexity of my code...according to me it will be O(nlgn + n^2) ...is it correct ?

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Mar 27, 2015

I have this assignment to write a Merge Sort algorithm using recursion. To start I have a very tough time picturing what is happening when it comes to recursion, but I do understand how merge sorting works. At the moment I feel as though a very good portion of my code is correct, but I am having trouble with the recursion in the main method [ mergeSort(Queue<T> queue) ].

I have another 4 or so hours to pass in my assignment finished or not, and at this point I can honestly say I have no clue how to make my code work. I tried working through the problem on paper with a simple queue of size 3, but even that is a struggle. On paper my code works perfectly fine, so there is definitely something I am missing.

Below is what I have along with my JUnit test.

Java Code:

private Queue<T> output = new Queue<T>();
private Queue<T> output1 = new Queue<T>();
private Queue<T> output2 = new Queue<T>();
public Queue<T> mergeSort(Queue<T> queue) {
// TODO 1
if(queue.size() <= 1) {
return queue;

[Code] .....

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Jan 22, 2015

how can I got about sorting an array that contains more than one value in a single element. Such as my array below has 4 values under one element. I know how to sort elements with single values however, slightly confused on this.

import java.util.Scanner;
import java.util.Arrays;
class Mobile
{

[Code]......

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Dec 25, 2014

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Apr 19, 2014

I got this code from wikipedia when trying to learn about the radix sort algorithm now I understand that the algorithm sorts by significant digits but it's the code that I'm not too sure about for instance the series of for loops at the bottom what exactly is going on there and why is it mod by 10? Also why are there three different integer arrays a, b, and bucket?

public static void radixsort( int[] a, int n) {
int i;
int digit = 1;
int[] b = new int[n+1];
for (i = 1; i < n; i++)
if (a[i] > a[0])
a[0] = a[i];

[Code] ....

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Sep 16, 2014

I am trying to code a program that orders 5 random numbers from high to low with the basic coding i know (im starting to learn theory of methods... so you can imagine) When i run the code i cant get all 5 numbers ordered but my logic says the code is right although it's pretty confusing.

I know you could code in a simpler way but first i wanna get it as it is right now. When i debug (on my own way cause i dont know how to actually use it) shows line 72 with yellow color.

public class NuevaCalculadora {
import java.util.Scanner;
public static void main(String[] args) {

[Code]....

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Apr 27, 2014

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While I am on the topic BinaryTree is a balanced heap right?

Are there any libraries for depth or breath first search?

Is the ArrayList a double linked list?

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Oct 3, 2014

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This is my code.

import static java.time.Clock.system;
import java.util.Arrays;
public class test {
/**
* The swap method swaps the contents of two elements in an int array.
*
* @param The array containing the two elements.
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[Code] .....

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Jan 25, 2015

I have to write the Insertion Sort Algorithm using Java codes and at the same time find the time of execution for different sizes of array, filled with random numbers. If I try to show the numbers inserted into the array randomly, they don't appear at the console.

import javax.swing.JOptionPane;
public class Insertion {
public static void main(String[]args){
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[Code]...

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Apr 25, 2014

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Error Code: 1062
Call: INSERT INTO projects_beta2b_projects_beta2b (projects_PROJECTID) VALUES (?)
bind => [1 parameter bound]
Query: DataModifyQuery(name="projects" sql="INSERT INTO projects_beta2b_projects_beta2b (projects_PROJECTID) VALUES (?)")

[Code] .....

My classes are:

projects.java

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[Code] ...

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-------
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2, B
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Map B
-------
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Apr 17, 2015

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String newGems = gem.getText();
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[Code] ....

And this is what the original file is:

Quote
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startingDarkElixir=1000000
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I've come up with this so far.

import java.io.FileInputstream;
import java.io.FileNotFoundException;
import java.io.IOException;
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[Code] .....

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