Modifier isNative(mod) method in Java with Examples

The isNative(mod) method of java.lang.reflect.Modifier is used to check if the integer argument includes the native modifier or not. If this integer parameter represents native type Modifier then method returns true else false.

Syntax:

public static boolean isNative(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 native modifier, false otherwise.

Below programs illustrate isNative() method:
Program 1:

// Java program to illustrate isNative() method

import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

public class GFG {

    public static void main(String[] args)
        throws NoSuchFieldException
    {

        // get Method class object
        Method[] methods
            = Calculator.class.getMethods();

        // get Modifier Integer value
        int mod = methods[0].getModifiers();

        // check Modifier is native or not
        boolean result = Modifier.isNative(mod);

        System.out.println("Mod integer value "
                           + mod + " is native : "
                           + result);
    }

    class Calculator {
        native void addNumbers();
    }
}

Output:

Mod integer value 17 is native : false

Program 2:

// Java program to illustrate isNative()

import java.lang.reflect.*;

public class GFG {

    public static void main(String[] args)
    {

        // get Method class object
        Method[] methods
            = Numbers.class.getMethods();

        // get Modifier Integer value
        int mod1 = methods[0].getModifiers();
        int mod2 = methods[1].getModifiers();

        // check Modifiers are native or not
        boolean result1 = Modifier.isNative(mod1);
        boolean result2 = Modifier.isNative(mod2);

        // print results
        System.out.println("Mod integer value "
                           + mod1 + " for method "
                           + methods[0].getName()
                           + " is native : "
                           + result1);

        System.out.println("Mod integer value "
                           + mod2 + " for method"
                           + methods[1].getName()
                           + " is native : "
                           + result2);
    }

    // sample native class
    abstract class Numbers {

        abstract public int initializeNumber();
        int declareNumbers()
        {
            return 0;
        }
    }
}

Output:

Mod integer value 1025 for method initializeNumber is native : false
Mod integer value 17 for methodwait is native : false

References: https://docs.oracle.com/javase/10/docs/api/java/lang/reflect/Modifier.html#isNative(int)