Java中的类 isEnum() 方法及示例
Java.lang.Class 类的isEnum()方法用于检查这个 Class 是否是 Enum 类。如果这个 Class 是 Enum 类,则该方法返回 true。否则返回 false。
句法:
public boolean isEnum()
参数:此方法不接受任何参数。
返回值:如果这个 Class 是 Enum 类,则此方法返回true 。否则返回false 。
下面的程序演示了 isEnum() 方法。
示例 1:
Java
// Java program to demonstrate isEnum() method
public class Test {
public static void main(String[] args)
throws ClassNotFoundException
{
// returns the Class object for this class
Class myClass = Class.forName("Test");
System.out.println("Class represented by myClass: "
+ myClass.toString());
// Check if this class is an enum
// using isEnum() method
System.out.println("Is Test an enum: "
+ myClass.isEnum());
}
}
Java
// Java program to demonstrate isEnum() method
enum A {}
public class Test {
public static void main(String[] args)
throws ClassNotFoundException
{
// returns the Class object for A
Class myClass = A.class;
// Check if myClass is an enum
// using isEnum() method
System.out.println("Is A an enum: "
+ myClass.isEnum());
}
}
输出:
Class represented by myClass: class Test
Is Test an enum: false
示例 2:
Java
// Java program to demonstrate isEnum() method
enum A {}
public class Test {
public static void main(String[] args)
throws ClassNotFoundException
{
// returns the Class object for A
Class myClass = A.class;
// Check if myClass is an enum
// using isEnum() method
System.out.println("Is A an enum: "
+ myClass.isEnum());
}
}
输出:
Is A an enum: true
参考: https://docs.oracle.com/javase/9/docs/api/ Java/lang/Class.html#isEnum–