The isInterface(mod) method of java.lang.reflect.Modifier is used to check if the integer argument includes the interface modifier or not. If this integer parameter represents interface type Modifier then method returns true else false.
Syntax:
public static boolean isInterface(int mod)
Parameters: This method accepts a integer names as mod represents a set of modifiers.
Return: This method returns true if mod includes the interface modifier; false otherwise.
Below programs illustrate isInterface() method:
Program 1:
// Java program to illustrate isInterface() method  import java.lang.reflect.Modifier;  public class GFG {      public static void main(String[] args)        throws NoSuchFieldException    {          // get Modifier Integer value        int mod = Symbols.class.getModifiers();          // check Modifier is interface or not        boolean result = Modifier.isInterface(mod);          System.out.println("Mod integer value "                           + mod + " is interface : "                           + result);    }      interface Symbols {        void createSynbols();    }} |
Output:
Mod integer value 1544 is interface : true
Program 2:
// Java program to illustrate isInterface()  import java.lang.reflect.Modifier;  public class GFG {      public static void main(String[] args)        throws NoSuchFieldException    {          // get Modifier Integer value        int mod = Calculator.class.getModifiers();          // check Modifier is Interface or not        boolean result = Modifier.isInterface(mod);          System.out.println("Mod integer value "                           + mod + " is Interface : "                           + result);    }      abstract class Calculator {        abstract void addNumbers();    }} |
Output:
Mod integer value 1024 is Interface : false
References: https://docs.oracle.com/javase/10/docs/api/java/lang/reflect/Modifier.html#isInterface(int)
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