java - How can check if we can cast an object to another?

Question

How can check if we can cast an object to another?

I have an object that it is an Arraylist of instances of an class that can be dynamically in 2 other class. How can I check that I can cast my object to each of them Arraylist class?

For example:

• My classes are class1, class2 and class3.
• My object is obj.

I want check it:

ArrayList<class1> ar1=new Arraylist<class1>();
ar1=(ArrayList<class1>)obj;

How can I check if it can be true or false?

question from:https://stackoverflow.com/questions/17759768/how-can-check-if-we-can-cast-an-object-to-another

Answer 1

Something like this :-

import java.util.ArrayList;

public class qu
{
    public static void main(String args[])
    {
        ArrayList<String> ar1=new ArrayList<String>();
        ArrayList<Character> obj = new ArrayList<Character>();
        if(obj instanceof java.util.ArrayList)
            System.out.println("My problem Solved");
    }
}