comparing 2 arrays to see if they're equal

[Get_tanked]

I have to write a program that will create 2 boolean arrays and compare them to see if they are equal. The program contains a class that has all the methods I can use on the arrays and a another class with a main that tests those methods. The only indexes that I'm using in the array are the ones that contain true values, the other are not important. I'm having a problem with the method called equals. It is supposed to check if the two arrays are equal and if they are it will return true. When I use the method I keep getting false even though I know that the two arrays are copies of each other, because I used another method called copy to create the second array. I cant seem to find where I am going wrong and would really appreciate some help.

Thanks

public class Intcoll3 //This is the class that contains all of my methods the method I'm having trouble with is at the bottom and called equals
{
	   private boolean[] c;
	   private int how_many;

	   public Intcoll3()
	   {
	      c = new boolean[500];
	      how_many = 0;
	   }

	   public Intcoll3(int i)
	   {
	      c = new boolean[i];
	      how_many = 0;
	   }

	   public void copy(Intcoll3 obj)
	   {
		   if (this != obj)
		   {
			   c = new boolean[obj.c.length];
			   this.how_many = obj.how_many;
			   
			   for(int j = 0; j < obj.c.length; j++)
			   {
				   c[j] = obj.c[j]; 
			   }
			   //this.how_many = obj.how_many;
		   }
	   }

	   public boolean belongs(int i)
	   { 
	      boolean belongs;
		  if((i >= 0) && (i < c.length))
	      {
			  belongs = (c[i] == true);
	      }
	      else
	      {
	    	 belongs = false;
	      }
	      
		  return (belongs);
	    
	   }

	   public void insert(int i)
	   {	  
		   
		   if (i >= 0)
		  {  
	    	  if(i < c.length)
	    	  {
	    		  if(c[i] != true)
	 		      {
	    			  c[i] = true;
	 		    	  how_many++;
		    			  
	 		      }	 	 		    	
	 		     
	    	  }
	    	  else
	    	  {
	    		   boolean[] d = new boolean[i * 2];
				   for(int k = 0; k < c.length; k++)
				   {
					   d[k] = c[k];
				   }
				   c = d;	   
	 
				   if(c[i] != true)
				   {
					   c[i] = true;
					   how_many++;
			    			  
				   }	 		   
	    	  }
		  }
	   }


	   public void omit(int i)
	   {
		   if(i < c.length)
		   {
			   if (c[i] == true)
			   {
				   c[i] = false;
				   how_many --;
			   }
		   }
		   else
		   {
			   System.out.println("The number you entered is to large");
			   System.exit(1);
		   }
	   }

	   public int get_howmany()
	   {
	      return how_many;
	   }

	   public void print()
	   {
	      int j = 0;
	      while (j < c.length)
	      {
	         if(c[j] == true)
	         {
	    	 System.out.println(j);
	         }
	         j++;
	      }
	      
	   }
	   
	   public boolean equals(Intcoll3 obj)//This is the method I'm having trouble with I want to use the belongs method to see if the index contains a true value
	   {
		   int j = 0; boolean result = true;//Also j refers to the index's that contain the true values. I only care about the indexes with true the other are not important
		   if(this.how_many != obj.how_many)
		   {
			   result = false;
		   }
		   else
		   {
			   while ((j <= obj.c.length)&&result)
			   {
				   
				   result = obj.belongs(j); j++;
			   }
	
		   }
		   return result;

	   }
	   
}

import java.util.Scanner;

public class Intcoll3client //This class has a main program that tests my methods
{
	public static final int SENTINEL = -1;
	public static void main(String[] args)
	{
		int value;
		int test;
		Scanner kb = new Scanner(System.in); 
		Intcoll3 X = new Intcoll3();
		Intcoll3 Y = new Intcoll3();
		
		System.out.println("Enter the index where you would like to insert the true value or -1 to quit: ");
		value = kb.nextInt();
		
	
		while(value != SENTINEL)
	    {
			X.insert(value);
			
			System.out.println("Enter the index where you would like to insert the True value or -1 to quit: ");
			value = kb.nextInt();
			
			
	    }
		
		System.out.println("The following indexes have true values");
		X.print();
		
		Y.copy(X);	//This makes Y a copy of X
		System.out.println("Y is a copy of X and contains: ");
		Y.print();
		System.out.println("The equals method for X and Y returned: " + Y.equals(X));	//This is where I call the equals method that isn't working
		
	}
			
}

[eRaaaa]

	   public boolean equals(Intcoll3 obj)//This is the method I'm having trouble with I want to use the belongs method to see if the index contains a true value
	   {
		  return Arrays.equals(this.c, obj.c);
	   }

:D

Your code is very complicated. Iterate from 0 to array.length-1 and check if this.c[i] != obj.c[i]. If this is true, return false immediately, if not, iterate further. if your for-loop ends, you can return true!

[hemant_metalia]

You can also try the method equals of Array class for comparing two arrays

e.g. Boolean Arrays.equals(obj1[],obj2[])