The Java.util.EnumMap.remove(key) method in Java is used to remove the specified key from the map.
Syntax:
remove(Object key)
Parameters: The method takes one parameter key which refers to the key whose mapping is to be removed.
Return Value: The method does not return any value.
Below programs illustrate the working of remove(key) function:
Program 1:
// Java program to demonstrate remove() import java.util.*;
// An enum of geeksforgeeks public enum gfg {
India_today,
United_States_today
} ; class Enum_demo {
public static void main(String[] args)
{
EnumMap<gfg, String> mp = new EnumMap<gfg, String>(gfg. class );
// Values are associated
mp.put(gfg.India_today, "61.8%" );
mp.put(gfg.United_States_today, "18.2%" );
// Prints the map
System.out.println( "The EnumMap: " + mp);
// Remove mapping of this key
mp.remove(gfg.United_States_today);
// Prints the final map
System.out.println( "Map after removal: " + mp);
}
} |
Output:
The EnumMap: {India_today=61.8%, United_States_today=18.2%} Map after removal: {India_today=61.8%}
Program 2:
// Java program to demonstrate the working of keySet() import java.util.*;
// an enum of geeksforgeeks // rank in India and United States public enum gfg {
India_today,
United_States_today
} ; class Enum_demo {
public static void main(String[] args)
{
EnumMap<gfg, Integer> mp = new EnumMap<gfg, Integer>(gfg. class );
// Values are associated
mp.put(gfg.India_today, 69 );
mp.put(gfg.United_States_today, 1073 );
// Prints the map
System.out.println( "The EnumMap: " + mp);
// Remove mapping of this key
mp.remove(gfg.United_States_today);
// Prints the final map
System.out.println( "Map after removal: " + mp);
}
} |
Output:
The EnumMap: {India_today=69, United_States_today=1073} Map after removal: {India_today=69}