Java Method getParameterTypes() Method

The getParameterTypes () method of Method class returns an array of type class objects representing the formal parameter types, in the order in which they are declared. If the underlying executable takes no parameter, then an array of length 0 is returned.

Syntax

Parameter

Returns

The parameter types for the executable this object represents

Throw

Example 1

//import statement
import java.lang.reflect.Method;
public class  ReflectMethodgetParameterTypesExample1  {
    public static void proc(int i, String s, String... args) {}  //static method proc
    public static void main(String... args) throws NoSuchMethodException {  //main method
        Method mthd =  ReflectMethodgetParameterTypesExample1.class.getDeclaredMethod("proc", int.class, String.class, String[].class);
        Class[]  cls= mthd.getParameterTypes();
         for (int i = 0; i < cls.length; i++) { //loop from i to length of array containing parameter types
         System.out.println(cls[i]);
      }
    }
}

Test it Now

Output:

int
class java.lang.String
class [Ljava.lang.String;

Example 2

import java.lang.reflect.Method;
public class ReflectMethodgetParameterTypesExample2 {
    public static void method1(int x , int y , double z , String str) {}  //static method  method1
    public static void main(String... args) throws NoSuchMethodException {
        Method mthd = ReflectMethodgetParameterTypesExample2.class.getDeclaredMethod("method1", int.class, int.class, double.class , String.class);
         Class[]  cls= mthd.getParameterTypes();
         for (int i = 0; i < cls.length; i++) {   //loop from i to length of array containing parameter types
         System.out.println(cls[i]);
      }
    }
}

Test it Now

Output:

Int    //output representing the type of parameters
int
double
class java.lang.String

Next TopicJava Method Class

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