What could cause java.lang.reflect.InvocationTargetException?

The java.lang.reflect.InvocationTargetException is a checked exception that is thrown when an exception is thrown by an invoked method or constructor. This exception is thrown by the java.lang.reflect package, which provides tools for accessing and manipulating the members of classes and objects at runtime.

There are several possible causes for the InvocationTargetException:

  1. The invoked method or constructor throws an exception: If the method or constructor that is being invoked throws an exception, the InvocationTargetException will be thrown to wrap the exception.

  2. The argument passed to the method or constructor is invalid: If the method or constructor expects a certain type of argument, and an invalid argument is passed, it might throw an exception.

  3. The object on which the method or constructor is invoked is null: If the object on which the method or constructor is invoked is null, a NullPointerException will be thrown.

To fix the InvocationTargetException, you need to determine the root cause of the exception and address it. You can do this by examining the cause of the exception, which is the exception thrown by the invoked method or constructor.

Here's an example of how you can catch the InvocationTargetException and handle the cause of the exception:

import java.lang.reflect.InvocationTargetException;

public class Main {
  public static void main(String[] args) {
    try {
      // Invoke a method or constructor here
    } catch (InvocationTargetException e) {
      // Get the cause of the exception
      Throwable cause = e.getCause();
      // Handle the cause of the exception

I hope this helps! Let me know if you have any other questions.