Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Scott Dunning <scottwd01@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: Help with java insertion sort program
Date: Sat, 09 Aug 2014 21:11:45 -0700
Organization: A noiseless patient Spider
Lines: 78
Message-ID: <ls6r8g$694$1@dont-email.me>
References: <ls6k6e$v0r$1@dont-email.me> <ls6lcd$5nm$1@dont-email.me> <ls6p9j$v7a$1@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Sun, 10 Aug 2014 04:08:48 +0000 (UTC)
Injection-Info: mx05.eternal-september.org; posting-host="11828741c91d0da908948c6ecdf164c7"; logging-data="6436"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18XMnr+30OICJZYXtL7Dc7J9APLpstAuqc="
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:24.0) Gecko/20100101 Thunderbird/24.6.0
In-Reply-To: <ls6p9j$v7a$1@dont-email.me>
Cancel-Lock: sha1:w4jtVaNhI5EmnAGKc3Rq5mrkmmk=
Xref: csiph.com comp.lang.java.programmer:29610

Ok so I realized that I was not filling the array with anything but now 
I'm having issues filling it correctly.  It's only filling the array 
with three of the user inputs and I just cannot figure out why....


import java.util.Scanner;

public class DriverSort {

	public static void main(String[] args) {
		
		Scanner scan =new Scanner(System.in);
		Sorter sorter = new Sorter();

	    int choice;  // variable which says which sorting algorithm to use

		System.out.println("1-Insertion sort\n"
						+"2-Selection sort\n"
						+ "3-Bubble sort\n"
						+ "0-quit\n");
		choice = scan.nextInt();
		
		System.out.println("Please enter the number for a sorting method or 
enter 0 to quit: ");
		int size = scan.nextInt();
		int input[] = new int[size];
		for(int i = 0; i < size; i++) {
			input[i] = scan.nextInt();
		}
		
	    System.out.println("\nBefore Sorting: ");
	    Sorter.printArray(input);
             // sort the array
             Sorter.insertionSort(input);
             System.out.println("\nAfter Sorting: ");
             Sorter.printArray(input);
		
		switch (choice) {
		
		case 0:
			System.out.println("Goodbye!");
			System.exit(0);
			break;
			
		case 1:
			Sorter.insertionSort(input);
         	break;

         }
     }
}

import java.util.Arrays;

public class Sorter {
	
	public static int[] insertionSort(int[] arr) {

		for (int i = 1; i < arr.length; i++) {
             int valueToSort = arr[i];
             int j = i;
             while (j > 0 && arr[j - 1] > valueToSort) {
                 arr[j] = arr[j - 1];
                 j--;
             }//end while loop.
             // insert the element
             arr[j] = valueToSort;
		}//end for loop
             return arr;
	}//end insertionSort		

					
		public static void printArray(int[] arr) {
		    System.out.println(Arrays.toString(arr));			
		}
}