El método isEnumConstant() de java.lang.reflect.Field se usa para verificar si este campo representa un elemento de un tipo enumerado o no. Si este campo representa un elemento de un tipo enumerado, el método devuelve verdadero o falso. Sintaxis:
public boolean isEnumConstant()
Parámetros: Este método no acepta nada. Retorno : este método devuelve verdadero si y solo si este campo representa un elemento de un tipo enumerado. Los siguientes programas ilustran el método isEnumConstant(): Programa 1:
Java
// Java program to illustrate
// isEnumConstant () method
import java.lang.reflect.Field;
import java.time.Month;
public class GFG {
public static void main(String[] args)
throws NoSuchFieldException
{
// get all declared fields of Month class
Field[] declaredFields
= Month.class.getDeclaredFields();
// loop through Field array
// and print Field name and
// check whether the field is EnumConstant
for (int i = 0; i < declaredFields.length; i++) {
System.out.print(
"Field --> Name: "
+ declaredFields[i].getName()
+ "; isEnumConstant: "
+ declaredFields[i]
.isEnumConstant()
+ "\n");
}
}
}
Producción:
Field --> Name: JANUARY; isEnumConstant: true Field --> Name: FEBRUARY; isEnumConstant: true Field --> Name: MARCH; isEnumConstant: true Field --> Name: APRIL; isEnumConstant: true Field --> Name: MAY; isEnumConstant: true Field --> Name: JUNE; isEnumConstant: true Field --> Name: JULY; isEnumConstant: true Field --> Name: AUGUST; isEnumConstant: true Field --> Name: SEPTEMBER; isEnumConstant: true Field --> Name: OCTOBER; isEnumConstant: true Field --> Name: NOVEMBER; isEnumConstant: true Field --> Name: DECEMBER; isEnumConstant: true Field --> Name: ENUMS; isEnumConstant: false Field --> Name: $VALUES; isEnumConstant: false
Programa 2:
Java
// Java program to illustrate
// isEnumConstant () method
import java.lang.reflect.Field;
public class GFG {
public static void main(String[] args)
throws NoSuchFieldException
{
// get all declared fields of Symbols class
Field[] declaredFields
= Symbols.class.getDeclaredFields();
// loop through Field array
// and print Field name and
// check whether the field is EnumConstant
for (int i = 0; i < declaredFields.length; i++) {
System.out.print(
"Field --> Name: "
+ declaredFields[i].getName()
+ "; isEnumConstant: "
+ declaredFields[i]
.isEnumConstant()
+ "\n");
}
}
private static enum Symbols {
Alpha,
Beta,
Gamma
}
}
Producción:
Field --> Name: Alpha; isEnumConstant: true Field --> Name: Beta; isEnumConstant: true Field --> Name: Gamma; isEnumConstant: true Field --> Name: ENUM$VALUES; isEnumConstant: false
Referencias: https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html#isEnumConstant–
Publicación traducida automáticamente
Artículo escrito por AmanSingh2210 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA