Can anyone help me about deleting the repeats by java??

Question

My subject is to write a static method called deleteRepeats that has a partially filled array of characters as formal parameter and deletes all repeated letters from the array.And when a letter is deleted, the remaining letters are moved one position to fill in the gap.This second formal parameter cannot be changed by a Java method, so have the method return the new value for this parameter. For example;
char a[10];
a[0] = 'a';
a[1] = 'b';
a[2] = 'a';
a[3] = 'c';
int size = 4;
size = deleteRepeats(a, size);
After this code is executed, the value of a[0] is 'a', the value of a[1] is 'b', the value of a[2] is 'c', and the value of size is 3
So I did it like.Is it true?
public class deleteRepeats{
public static int deleteRepeats(char[] a, int size) {
     size=a.length;
     int numberOfRepeats=0;
     for(int i=0; i<size; i++) {
     for(int j=1; i+j<size; j++) {
     if(a==a[i+j]) {
     a[i+j]=a[(i+j)+1];
     size--;
     numberOfRepeats++;
return size;

Answer 1

nclow wrote:
CellAt wrote:
If you think Set is very simple for this question please share with me.I figured this was a homework assignment and you didn't know about collections yet. Why not read the documentation?
[http://java.sun.com/javase/6/docs/api/java/util/Set.html|http://java.sun.com/javase/6/docs/api/java/util/Set.html]
Your existing implementation would work if you would address the bug I pointed out...thanks...