El método Java.util.EnumMap.clone() en Java se usa para copiar los valores asignados de un mapa a otro. Básicamente crea una copia superficial de este mapa.
Sintaxis:
Enum_map_2 = Enum_map_1.clone()
Parámetros: El método no acepta ningún argumento.
Valor devuelto: el método devuelve una copia superficial de un EnumMap.
Los siguientes programas ilustran el método Java.util.EnumMap.clone()
Programa 1:
// Java program to demonstrate clone() method
import java.util.*;
// An enum of fruits price is created
public enum Price_of_Fruits {
Orange,
Apple,
Banana,
Pomegranate,
Guava
};
class Enum_map {
public static void main(String[] args)
{
EnumMap<Price_of_Fruits, Integer> mp1 = new EnumMap<Price_of_Fruits,
Integer>(Price_of_Fruits.class);
EnumMap<Price_of_Fruits, Integer> mp2 = new EnumMap<Price_of_Fruits,
Integer>(Price_of_Fruits.class);
// Values are associated in mp1
mp1.put(Price_of_Fruits.Orange, 30);
mp1.put(Price_of_Fruits.Apple, 60);
mp1.put(Price_of_Fruits.Banana, 40);
mp1.put(Price_of_Fruits.Pomegranate, 120);
mp1.put(Price_of_Fruits.Guava, 20);
// Price of fruits in mp1
System.out.println("Price of fruits in 1st map " + mp1);
// Copying the values of mp1 to mp2
mp2 = mp1.clone();
// Price of fruits in mp2
System.out.println("Price of fruits in 2nd map " + mp2);
}
}
Producción:
Price of fruits in 1st map {Orange=30, Apple=60, Banana=40, Pomegranate=120, Guava=20}
Price of fruits in 2nd map {Orange=30, Apple=60, Banana=40, Pomegranate=120, Guava=20}
Programa 2:
// Java program to demonstrate clone() method
import java.util.*;
// An enum of gfg ranking is created
public enum gfg_ranking {
Global_2018,
India_2018
};
class Enum_map {
public static void main(String[] args)
{
EnumMap<gfg_ranking, Integer> mp1 = new EnumMap<gfg_ranking,
Integer>(gfg_ranking.class);
EnumMap<gfg_ranking, Integer> mp2 = new EnumMap<gfg_ranking,
Integer>(gfg_ranking.class);
// Values are associated in mp1
mp1.put(gfg_ranking.Global_2018, 800);
mp1.put(gfg_ranking.India_2018, 72);
// Price of fruits in mp1
System.out.println("GeeksforGeeks ranking in first map " + mp1);
// Copying the values of mp1 to mp2
mp2 = mp1.clone();
// Price of fruits in mp2
System.out.println("GeeksforGeeks ranking in second map " + mp2);
}
}
Producción:
GeeksforGeeks ranking in first map {Global_2018=800, India_2018=72}
GeeksforGeeks ranking in second map {Global_2018=800, India_2018=72}