Java Collection, TreeMap Exercises: Delete all elements from a given Tree Map
Java Collection, TreeMap Exercises: Exercise-6 with Solution
Write a Java program to delete all elements from a given Tree Map.
Sample Solution:-
Java Code:
import java.util.*;
import java.util.Map.Entry;
public class Example6 {
public static void main(String args[]){
// Create a tree map
TreeMap<String,String> tree_map1 = new TreeMap<String,String>();
// Put elements to the map
tree_map1.put("C1", "Red");
tree_map1.put("C2", "Green");
tree_map1.put("C3", "Black");
tree_map1.put("C4", "White");
System.out.println("Orginal TreeMap content: "+tree_map1);
tree_map1.clear();
System.out.println("The New map: "+tree_map1);
}
}
Sample Output:
Orginal TreeMap content: {C1=Red, C2=Green, C3=Black, C4=White} The New map: {}
Java Code Editor:
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Previous: Get a collection view of the values contained in this map.
Next: Sort keys in Tree Map by using comparator.
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Java: Tips of the Day
getEnumMap
Converts to enum to Map where key is the name and value is Enum itself.
public static <E extends Enum<E>> Map<String, E> getEnumMap(final Class<E> enumClass) { return Arrays.stream(enumClass.getEnumConstants()) .collect(Collectors.toMap(Enum::name, Function.identity())); }
Ref: https://bit.ly/3xXcFZt
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