// Convert all Map keys to a List List<String> result = new ArrayList(map.keySet()); // Convert all Map values to a List List<String> result2 = new ArrayList(map.values()); // Java 8, Convert all Map keys to a List List<String> result3 = map.keySet().stream() .collect(Coll...
Here, we use thekeySet()method to get keys by creating an array list from a set returned by a map. Check out the following example, which converts a map into a list. Example 1: packagemaptolist;importjava.util.HashMap;importjava.util.List;importjava.util.Map;importjava.util.stream.Col...
Similarly, we cancollect the Map keys into an array.Map.keyset()returns theSetof all the keys in aMap. UsingSet.toArray()we can convert it to an array of Strings. StringkeyArray[]=map.keySet().toArray(newString[0]); 2. ConvertMaptoList We can collect the Map values into a List ...
We used map's keySet() method to get all the keys and created an ArrayList keyList from them. Likewise, we used the map's values() method to get all the values and created an ArrayList valueList from them. Example 2: Convert Map to List using stream import java.util.*; import java...
// Convert all Map values to a List List<String> result2 = new ArrayList(map.values()); // Java 8, Convert all Map keys to a List List<String> result3 = map.keySet().stream() .collect(Collectors.toList()); // Java 8, Convert all Map values to a List ...
keySet()); System.out.println("\n==> Size of Key list: " + keyList.size()); for (String temp : keyList) { System.out.println(temp); } // Converting HashMap Values into ArrayList List<Integer> valueList = new ArrayList<Integer>(companyDetails.values()); System.out.println("\n=...
keySet=schoolAgeCriteria.keySet();List<String>schoolKeyList=newArrayList<String>(keySet);System.out.println("Size of Key list from Map: "+schoolKeyList.size());// print list elementSystem.out.println("Printing HashMap keys from converted list : ");for(Stringkey:schoolKeyList) {System.out....
ValueList.forEach(n->System.out.println(n));System.out.println("--Convert Map keys to List--");List<Integer>keyList=map.keySet().stream().collect(Collectors.toList());keyList.forEach(n->System.out.println(n));System.out.println("--Convert Map keys to List using sort--");List<...
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That’s all about converting Map to a Stream in Java. Also See: Map interface keySet(), values(), entrySet() methods in Java Convert Map to a List in Java 8 and above Iterate Map in Java using entrySet() method Rate this post Average rating 4.55/5. Vote count: 11 Thanks...