carrying int int arrays

[VKS123]

Hello, :?:
I need help with adding int arrays
i got the everything working except for when i need to carry more than once and if the carry isn't in the ones digit
honestly i can't think of anything :$
any ideas, suggestion, code would be welcomed

public class BCD {
	private int[] digits;
	BCD(int num){
		int DIGIT=num%10;
		num=num/10;
		digits=new int[1];
		digits[0]=DIGIT; 
		while(num>0){
			DIGIT=num%10;
			addADigit(DIGIT);
			num=num/10;
		}
	
        public void addADigit(int newdigit){
		int[] Digi= new int[digits.length+1];
		Digi[digits.length]=newdigit;
		for(int i=0; i<digits.length; i++){
			Digi[i]=digits[i];
		}
		digits = Digi;
	}              
        public BCD addBCDs(BCD other){
		int[] dig={};
		BCD addedBCD=new BCD(dig);
		//int[] carry={};
		int carry=0;
		int digit1=0;
		int length1=other.numberOfDigits();
		int length2=digits.length;
		int longerLength;

		if (length1==length2){
			longerLength=length1;
			for(int d = 0; d <longerLength ;d++){
				digit1=other.nthDigit(d)+digits[d];
				addedBCD.addADigit(digit1);
			}
		}else if(length1>length2){
			longerLength=length1;
			int mlength=length1-length2;
			System.out.println(mlength);
			for(int c = mlength-1; c <= longerLength ;c--){
				digits[c]=0;
				// 	System.out.println("digits: "+digits);	 
			}
			for(int d = 0; d <longerLength ;d++){
				digit1=other.nthDigit(d)+digits[d];
				addedBCD.addADigit(digit1);
				//	System.out.println("final[] "+addedBCD);
			}
		}else if(length1<length2){
			longerLength=length2;
			for(int c =length2-length1; c <= longerLength ;c++){
				other.addADigit(0);
			}
			for(int d = 0; d <longerLength ;d++){
				digit1=other.nthDigit(d)+digits[d];
				addedBCD.addADigit(digit1);
			}
		}
		return addedBCD;
	}
	public static void main(String[] args) {
                int[] case1={36};
		int[] case2={21};
		int[] case3={123};
		int[] case4={1234};
		int[] case5={123450};
		int[] case6={1234567};

                BCD test1=new BCD(case1);
		BCD test2=new BCD(case2);
		BCD test3=new BCD(case3);
		BCD test4=new BCD(case4);
		BCD test5=new BCD(case5);
		BCD test6=new BCD(case6);

		BCD addA=new BCD(0);
		BCD addB=new BCD(367);
		BCD addC=new BCD(355);

	        System.out.println(addA.addBCDs(addA));    // THIS WORKS
		System.out.println(test1.addBCDs(addA));   // THIS WORKS
		System.out.println(addA.addBCDs(test2));   // THIS WORKS
		System.out.println(test1.addBCDs(test3));  // THIS WORKS 
		System.out.println(test6.addBCDs(test5));  // THIS WORKS  
		System.out.println(test5.addBCDs(test6));  // THIS WORKS  
		System.out.println(addB.addBCDs(addC));    // Doesn't work
  
	} 

}

This is the output that i get:

0
36
21
159
1358017
1358017
61112 <-- This is the only test case that doesn't work
I think that it is printing the digits it is supposed to carry the answer should be 722
6+1, 1+1, 2
it carries when there is only 1 carry
:confused:
Thanks in advance for any help!