Thread: the values of my array are totally modified by an affectation

Hello,
I am new in java programming. I'm doing an exercise on a Mooc and I have some trouble with my code.
The following code is supposed to return an array and I will print the values that are contained in it.

public static Element[] LZ77(int[] tab, int tailleFenetre)
	{
 
		int taille = LZ77Longueur(tab,tailleFenetre);
		Element[] t = new Element [taille];
		Occurrence test = new Occurrence(0,0);
		Element temp = new Element(test,0);
		int c = 0;
		int element = 0;
		int i = 0;
		int next = 0;
		while (c < tab.length && tab[i+1]!=2)
		{
			 test = plusLongueOccurrence(tab,c,tailleFenetre);
			 int k = test.taille;
			 int r = test.retour;
			 next = tab[c+k];
			 c = c + k + 1;
			 test.retour = r;
			 test.taille = k;
			 //temp.s = next;
			 temp.e = test;
			 temp.s = next;
			 t[element]=temp;
			 element ++;
 
	   }
		t[t.length-1].s = 2;
 
		return t;
	}

My problem is that the values of the array t are modified by the current affectation. How could I do to solve that?

Well, that's the output of my program
(10,4)2(10,4)2(10,4)2(10,4)2(10,4)2(10,4)2(10,4)2
Normally, I should obtain this:
(0,0)0(0,0)1(2,2)1(5,3)0(4,4)0(10,1)1(10,4)2

Can I provide you all my code? For testing , there is two function that should be called.

public class LZ77
{
	public static Occurrence plusLongueOccurrence(
		      int[] t,
		      int positionCourante,
		      int tailleFenetre
		    )
 
 
	 {
		 int c = positionCourante;
		 int f;
		 int count = 0;
		 int occurrence = 0;
		 Occurrence test = new Occurrence(0,0);
		 int back = 0;
		 String str1 = "";
		 String str2 = "";
		 int i = 0;
		 if (c-tailleFenetre > 0)
		 {
			 f = c-tailleFenetre;
		 }
		 else
		 {
			 f = 0;
		 }
		 //String str = Integer.toString(i);
		 if (t.length == 0)
		 {
 
			 return test;	
		 }
		 else{
 
 
			 while( f+ i < c && c + i < t.length )
			 {
 
				 	str1 = str1 + Integer.toString(t[f + i]);
				 	str2 = str2 + Integer.toString(t[c+i]);
 
					 if (str1.equals(str2))
					 {
 
					 	count ++;
					 	//System.out.println(str1 +" "+str2 + " count "+ count);
						if (occurrence < count ) //&& f + i <=tailleFenetre
						{
//						 System.out.print(" i " + i);
//						 System.out.print(" f " + f + " ");
						 occurrence = count;
						 back = c-f;
						 i++;
						}
						else
						{
							 i++;
 
						}
					}
					 else
					 {
					 i = 0;
					 f++;
					 str1 = "";
					 str2="";
					 count = 0;
 
					 }
			 	}
 
			 }
		 test.taille = occurrence;
		 test.retour = back;
		 return test;}
 
	public static int LZ77Longueur(int[] t, int tailleFenetre)
	  {
		int c = 0;
		int element = 0;
		int i = 0;
		Occurrence test1 = new Occurrence(0,0);
		while (c < t.length && t[i+1]!=2)
		{
			 test1 = plusLongueOccurrence(t,c,tailleFenetre);
			 int k = test1.taille;
			 c = c + k + 1;
			 element ++;
 
	   }
		return element;
 
	}
 
 
	/**
	 * @param tab
	 * @param tailleFenetre
	 * @return
	 */
// the part of the code that doesn't work
	[COLOR="#FF0000"]public static Element[] LZ77(int[] tab, int tailleFenetre)
	{
 
		int taille = LZ77Longueur(tab,tailleFenetre);
		Element[] t = new Element [taille];
		Occurrence test = new Occurrence(0,0);
		Element temp = new Element(test,0);
		int c = 0;
		int element = 0;
		int i = 0;
		int next = 0;
		while (c < tab.length && tab[i+1]!=2)
		{
			 test = plusLongueOccurrence(tab,c,tailleFenetre);
			 int k = test.taille;
			 int r = test.retour;
			 next = tab[c+k];
			 c = c + k + 1;
			// t[element].e.retour = r;
			 test.retour = r;
			 test.taille = k;
			 temp.s = next;
			 temp.e = test;
			 temp.s = next;
			 t[element]=temp;
			 element ++;
 
	   }
		t[t.length-1].s = 2;
 
		return t;
	}[/COLOR]
 
 
	public static void afficheEncode(Element[] tab)
	{
		int r = 0;
		int t = 0;
		int next = 0;
		for (int i = 0; i<tab.length; i++)
		{
			r = tab[i].e.retour;
			t = tab[i].e.taille;
			next = tab[i].s;
			System.out.print("("+ r + "," + t + ")" + next);
		}
		System.out.print("\n");
	}
 
 
 
}
 class Occurrence 
 {
	 public int taille;
	 public int retour;
 
	 Occurrence ( int retour, int taille) 
	 {
 
		 this.taille = taille;
		 this.retour = retour;
 
	 }
 }	 
 
 
	 class Element
	{
		public Occurrence e;
		public int s;
		  Element (Occurrence e, int s) 
		  {
			  this.e = e;
			  this.s = s;
		  }
 
	}

For testing I use the following code:

final static int[] testsLz = { 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 2 };
for (int[] line: Data.testsLz)
    	LZ77.afficheEncode(LZ77.LZ77(line, 10));
          System.out.printf("done\n");

It's only the function LZ77 that doesn't work.

public class Test {
 
  public static void main(String[] args) {
testLz3();
public static void testLz3() {
 
    final static int[]line =  { 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 2 }
    System.out.printf("testLz3 ");
    for (int[] line: Data.testsLz)
    	LZ77.afficheEncode(LZ77.LZ77(line, 10));
      //LZ77.afficheEncode(LZ77.LZ77(line, Data.tailleFenetre));
    System.out.printf("done\n");
 
  }