How to Iterate HashMap of type HashMap<String, ArrayList<String>>

[Anu satya]

HI,
I am trying to iterate the hash Map. But, I am getting error at "for loop" please help.
I want the each value in the arraylist and do some string manipulation.

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


public class IterateMap {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		
		Map<String, ArrayList<String>> myMap = new HashMap<String, ArrayList<String>>();
		List<String> uList = new ArrayList<String>();
		uList.add("week1");
		uList.add("week2");
		myMap.put("April", (ArrayList<String>) uList);
		
		uList.add("week3");
		uList.add("week4");
		myMap.put("May", (ArrayList<String>) uList);
		int i=0;
		int j=0;
		for (String key : myMap.keySet()) {   //<--- error over here  "Type mismatch: can't convert element type object to String "
			System.out.println("i= " + i ); 
			i++;
			for (String value : myMap.get(key)) {  <-- error over here  " can only iterate over an array or an instance of java.lang.Iterable"
			
				System.out.println("j= " + j + value );
				j++;
			}
			j=0;
		}
}
}

Please help

[Jesper de Jong]

First of all, declare your map like this (line 14):

// Note: List instead of ArrayList
Map<String, List<String>> myMap = new HashMap<String, List<String>>(); 

Then you can get rid of the casts in lines 18 and 22.

I tried your code and it worked without errors!

You most likely have a class that you wrote yourself that is called Map, and Java is getting confused, it takes your own class Map instead of the Map from java.util. Rename or delete your own class Map.