I have this Map:

Map<String, List<Map<String, Integer>>> map = new HashMap<>();

I want to iterate through this Map by using the classic for loop and without using other methods such as Iterator

Thank you!

CodePudding user response：

Yes, we can do it. Wrote sample implementation below. Hope it should help.

public class TestDummy {
    public static void main(String[] args) {
        Map<String, Integer> temp = new HashMap<>();
        temp.put("harish", 1);
        List<Map<String, Integer>> tempList = new ArrayList<>();
        tempList.add(temp);
        Map<String, List<Map<String, Integer>>> map = new HashMap<>();
        map.put("shyam", tempList);
        for (Map.Entry<String, List<Map<String, Integer>>> entry : map.entrySet()) {
            System.out.println("[Key] : "   entry.getKey()   " [Value] : "   entry.getValue());
        }
    }
}

Output will be as:

[Key] : shyam [Value] : [{harish=1}]

CodePudding user response：

public static void main(String[] args) {
    Map<String, List<Map<String, Integer>>> map = new HashMap<>();
    map.put("Test", List.of(Map.of("TestValue", 1)));
    map.put("Test2", List.of(Map.of("TestValue2", 2)));

    Object[] entries = map.entrySet().toArray();
    for (int i = 0; i < entries.length; i  ) {
        System.out.println(entries[i]);
    }
}