Thursday 2 November 2017

How to get the parameter count of method using Java Reflection | Reflection in java


Click here to watch in Youtube :
https://www.youtube.com/watch?v=szBf8LkhM-Y&list=UUhwKlOVR041tngjerWxVccw

DisplayMessage.java
class DisplayMessage
{
    
    public void displayMessage(String message)
    {
        System.out.println(message);
    }
}
ReflectionDemo.java
import java.lang.reflect.Method;

/**
 * 
 * How to get method parameter count.
 *
 */
public class ReflectionDemo
{
    public static void main(String[] args)
    {
        Class<DisplayMessage> classObj = DisplayMessage.class;
        Method[] methodArray = classObj.getMethods();
        for (Method method : methodArray)
        {
            System.out.println(method);
            System.out.println("Parameter Count = "+method.getParameterCount());
            System.out.println("---------------------------");
        }
    }

}
Output
public void DisplayMessage.displayMessage(java.lang.String)
Parameter Count = 1
---------------------------
public final void java.lang.Object.wait() throws java.lang.InterruptedException
Parameter Count = 0
---------------------------
public final void java.lang.Object.wait(long,int) throws java.lang.InterruptedException
Parameter Count = 2
---------------------------
public final native void java.lang.Object.wait(long) throws java.lang.InterruptedException
Parameter Count = 1
---------------------------
public boolean java.lang.Object.equals(java.lang.Object)
Parameter Count = 1
---------------------------
public java.lang.String java.lang.Object.toString()
Parameter Count = 0
---------------------------
public native int java.lang.Object.hashCode()
Parameter Count = 0
---------------------------
public final native java.lang.Class java.lang.Object.getClass()
Parameter Count = 0
---------------------------
public final native void java.lang.Object.notify()
Parameter Count = 0
---------------------------
public final native void java.lang.Object.notifyAll()
Parameter Count = 0
---------------------------

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/ReflectionDemo_method_paramcount.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ReflectionDemo_method_paramcount

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/35f19409ce262cff1a4ed631c9adc6ca413c2cb0/BasicJava/ReflectionDemo_method_paramcount/?at=master

See also:
  • All JavaEE Viedos Playlist
  • All JavaEE Viedos
  • All JAVA EE Links
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
  • Kids Tutorial
  • No comments:

    Post a Comment