How do I split an array list into two array lists based on a delimiter?

Suppose that I have an Array list of Array lists:

A = [2, 5, 6], [1, 6, 1], [], [7, 7], [4, 2], [9, 3]]

and I want to split them at the index where the element of the array list has the size of 0 so that it will look like this

x = [[2, 5, 6], [1, 6, 1]]
y = [[7, 7], [4, 2], [9, 3]]

but whenever I run my loop it comes out like this:

for(int i = 0; i < A.size(); i++) {
	ArrayList temp= A.get(i);
	int size = temp.size();
	if(size != 0) {
	   x.add(temp);
	}
	   y.add(temp);
	}

x = [[2, 5, 6], [1, 6, 1], [7, 7], [4, 2], [9, 3]]
y = [[2, 5, 6], [1, 6, 1], [], [7, 7], [4, 2], [9, 3]]

Can anyone please help me figure this out?

You logic is off. Currently you are avoiding writing the empty list into x; other than that you always write to both x and y.

You can have a boolean to say which list the data must be written to. Once you see a list with size 0, switch the flag.

boolean writeToX = true;

for(int i = 0; i < A.size(); i++) {
    ArrayList temp= A.get(i);
    int size = temp.size();
    if(size == 0) {
       writeToX = false;
       continue;
    }
    if (writeToX) {
        x.add(temp);
    } else {
        y.add(temp);
    }
      
}

Sidenote: Avoid using raw types.

https://stackoverflow.com/questions/2770321/what-is-a-raw-type-and-why-shouldnt-we-use-it

You need to keep track of the destination array like this:

boolean addToX = true;

for(ArrayList temp : A) {
  if(temp.isEmpty()) {
    addToX = false;  
  } else if(addToX) {
    x.add(temp);
  } else {
    y.add(temp);
  }
}

Try this, add a boolen flag to identify :-

	boolean flag=false;
	for(int i = 0; i < A.size(); i++) {
	    ArrayList temp= A.get(i);
	    int size = temp.size();
	    if(size != 0 && flag==false) {
	       x.add(temp);
	    }else if(size==0) {
	       flag=true;
	    }else if(size != 0 && flag==true){
	    	y.add(temp);
	    }

it is normal because you are just not putting the empty element to x but you are putting all other elements to x and y. You can have a boolean parameter, such as isNullArrayCome and check it on every iteration. Here it is

boolean isNullArrayCome = false;
for(int i = 0; i < A.size(); i++) {
    ArrayList temp= A.get(i);
    int size = temp.size();
    if(size == 0 ) {
      isNullArrayCome = true;
     }
     if(!isNullArrayCome){
       x.add(temp);
     } else {
       y.add(temp);
     }
}