Modifier isFinal(mod) method in Java with Examples
The isFinal(mod) method of java.lang.reflect.Modifier is used to check if the integer argument includes the final modifier or not. If this integer parameter represents final type Modifier then method returns true else false.
Syntax:
public static boolean isFinal(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 final modifier; false otherwise.
Below programs illustrate isFinal() method:
Program 1:
// Java program to illustrate isFinal() method  import java.lang.reflect.*;  public class GFG {      public static void main(String[] args)    {          // get Method class object        Method[] methods            = Shape.class.getMethods();          // get Modifier Integer value        int mod = methods[0].getModifiers();          // check Modifier is final or not        boolean result = Modifier.isFinal(mod);          System.out.println("Mod integer value "                           + mod + " is final : "                           + result);    }      class Shape {          public final void drawShape() {}    }} |
Output:
Mod integer value 17 is final : true
Program 2:
// Java program to illustrate isFinal()  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 final or not        boolean result1 = Modifier.isFinal(mod1);        boolean result2 = Modifier.isFinal(mod2);          // print results        System.out.println("Mod integer value "                           + mod1 + " for method "                           + methods[0].getName()                           + " is final : "                           + result1);          System.out.println("Mod integer value "                           + mod2 + " for method"                           + methods[1].getName()                           + " is final : "                           + result2);    }      // sample final class    abstract class Numbers {          public abstract int initializeNumber();        public final int declareNumbers()        {            return 0;        }    }} |
Output:
Mod integer value 1025 for method initializeNumber is final : false Mod integer value 17 for methoddeclareNumbers is final : true
References: https://docs.oracle.com/javase/10/docs/api/java/lang/reflect/Modifier.html#isFinal(int)
