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  1. #1
    zachnifane is offline Member
    Join Date
    Mar 2012
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    Default Problem with vector and if statement comparision

    this is a school assignment however im taking an independent study so it is one i have tasked myself to learning before a programming competition in the next couple of months, for the problem ive decided to use recursive method to sort the numbers however i want to use a vector to remove duplicates, and it isnt doing so here is the code, the first number inputted determines the size of the array then you enter that many numbers until it stops EXAMPLE OUTPUT:{input:5 -100 3 2 4 4 }-100 2 3 4 4 intead of -100 2 3 4
    Java Code:
    import java.util.*;
    public class Problem3 {
    	static int[]finalArray;
    	public static void main(String[] args) {
    		Scanner sc = new Scanner(;
    		int listLength = sc.nextInt();
    		int[] input = new int[listLength];
    		for (int i=0;i<input.length;i++){
    			input[i] = sc.nextInt();
    		for (int i=0;i<finalArray.length;i++){
    			System.out.print(finalArray[i]+" ");
    	private static void sort(int[]data){
    		for(int i = 0; i < data.length; i++) {
    			int min = i;
    			for(int j = i + 1; j < data.length; j++) {
    				if(data[j] < data[min]) 
    					min = j;
    			int t = data[min];
    			data[min] = data[i];
    			data[i] = t;
    	private static void removeDuplicates(int[]data){
    		Vector<Integer> vector = new Vector<Integer>();
    		for (int temp=0;temp<data.length;temp++){
    			vector.addElement(new Integer(data[temp]));//convert array into vector to remove data
    		for(int i = 0;i<vector.size();i++){
    			for (int j=0;j<vector.size();j++){
    				//System.out.println("Element at(i): "+vector.elementAt(i)+"\nElement at J: "+vector.elementAt(j));// debugging that i added, this is not nessessary
    				if(vector.elementAt(i)== vector.elementAt(j)&& j!=i){//i believe the problem is here
    					//System.out.println("it should delete here");
    		finalArray = new int[vector.size()];
    		for (int l=0;l<finalArray.length;l++){
    Last edited by zachnifane; 03-02-2012 at 04:35 PM. Reason: no example output

  2. #2
    doWhile is offline Moderator
    Join Date
    Jul 2010
    Rep Power

    Default Re: Problem with vector and if statement comparision

    Unless you have reason otherwise, when comparing objects you should use the equals method as opposed to == (the latter compares whether the references are the same, not the object values)

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