zmple.java

import java.util.*;

class Temp  {
	
	public static void main(String[] args) {

		// this works....

		ArrayList<ArrayList<String>> outer = new ArrayList<ArrayList<String>>();
		ArrayList<String> inner = new ArrayList<String>();

		outer.add(inner);
		inner.add("hi terra");

		System.out.println(outer.get(0).get(0));

		// so does this....
		
		outer = new ArrayList<ArrayList<String>>();
		inner = new ArrayList<String>();

		inner.add("hi boobs");

		outer.add(inner);
		
		System.out.println(outer.get(0).get(0));
	}	
}