how to write a java 8 steam code for the following code : 

List<String> myList =
		    Arrays.asList("a1", "a2", "b1", "c2", "c1");
			
			List<Integer> addList=new ArrayList<Integer>();
			
				for(String listobj:myList)
			{
				
				String appendedobj=listobj+"%";
				
				List<Integer> intlist=myMethod(appendedobj,listobj);
				
				
				
				addList.addAll(intlist);
				

			}
			
			
			public list<String> mymethod(appendedobj,listobj)
			{
			
			do something and retrurn list of integers;
			}


I want to covert this to java 8 stream code but how to call the myMethod with two arguments I am not able to get


 