Java EnumMap clear() method

The clear() method of Java EnumMap class is used to clear all the mapping from the map. This method does not remove the map instead it just removes all the entry from the map.

Syntax

Parameters

Returns

This method does not return any value.

Exception

Example 1

import java.util.EnumMap;
public class EnumMapClearExample1 {
   // create an enum
   public enum Tutorial{
   Java,Python,PHP,Android,AngularJS
   }; 
   public static void main(String[] args) {
   //create and populate enum map  
   EnumMap<Tutorial,String> map = 
              new EnumMap<Tutorial,String >(Tutorial.class);
   map.put(Tutorial.Java,"1");
   map.put(Tutorial.Python,"2");
   map.put(Tutorial.PHP,"3");
   map.put(Tutorial.Android,"4");
   map.put(Tutorial.AngularJS,"5");
// print the map  
   System.out.println("Values in map before removing:\n"+map); 
   //clear the mapping
   map.clear();
   //print the map again
   System.out.println("Values in map after removing:\n"+map);
   }
}

Test it Now

Output:

Values in map before removing:
{Java=1, Python=2, PHP=3, Android=4, AngularJS=5}
Values in map after removing:
{}

Example 2

import java.util.*;  
public class EnumMapClearExample2 {  
   // create an enum  
   public enum Days {  
   Monday, Tuesday, Wednesday, Thursday  
   };  
   public static void main(String[] args) {  
   //create and populate enum map  
   EnumMap<Days, String> map= new EnumMap<Days, String>(Days.class);  
   map.put(Days.Monday,"1");  
   map.put(Days.Tuesday,"2");  
   map.put(Days.Wednesday,"3");  
   map.put(Days.Thursday,"4");  
   // print the map  
   System.out.println("Values in map before removing:\n"+map); 
   //clear the mapping
   map.clear();
   //print the map again
   System.out.println("Values in map after removing:\n"+map);
   }    
}  

Test it Now

Output:

Values in map before removing:
{Monday=1, Tuesday=2, Wednesday=3, Thursday=4}
Values in map after removing:
{}

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Java EnumMap Class