In this tutorial we will see how to use the Java Map iterator interface with ArrayList. We will create an example to display the contents of the ArrayList.

• Java Map Iterator is an interface. It keeps the data in the key and value form.
• It is implemented by HashMap, Tree Map.
• Map has no iterator method.
• So use the entrySet() method to get the data in Set object form.
• Use the entrySet() method to get the data in Set object form.

Java Map Iterator with Example

import java.util.*;

public class map {
	public static void main(String[] args) {
		Map map = new TreeMap();
		map.put("a", new Integer(1000));
		map.put("b", 2000);
		map.put("c", new Integer(3000));
		map.put("d", new Integer(4000));

		Set s = map.entrySet();
		Iterator i = s.iterator();
		while (i.hasNext()) {
			System.out.println(i.next());
		}
	}
}

Output

a=1000 b=2000 c=3000 d=4000

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