El método Java.util.EnumMap.remove( key ) en Java se usa para eliminar la clave especificada del mapa.
Sintaxis:
remove(Object key)
Parámetros: el método toma una clave de parámetro que se refiere a la clave cuya asignación se eliminará.
Valor devuelto: el método no devuelve ningún valor.
Los siguientes programas ilustran el funcionamiento de la función eliminar ( tecla ):
Programa 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);
}
}
Producción:
The EnumMap: {India_today=61.8%, United_States_today=18.2%}
Map after removal: {India_today=61.8%}
Programa 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);
}
}
Producción:
The EnumMap: {India_today=69, United_States_today=1073}
Map after removal: {India_today=69}