New instance of class based on argument

Question

I\'m trying to make a function that takes one of many classes that extends Foo, and return a new instance of that object in its Class, not a new instance of F

Answer 1

Your function could be like this

public class NewInstanceTest {
    public static Object getNewInstance(Foo fooObject){
        java.lang.Class fooObjectClass = fooObject.getClass();
        try {
            return fooObjectClass.newInstance();
        } catch (InstantiationException e) {
            e.printStackTrace();
            return null;
        } catch (IllegalAccessException e) {
            e.printStackTrace();
            return null;
        }
 }
 public static void main(java.lang.String[] args){
        // This prints Foo
        java.lang.System.out.println(getNewInstance(new Foo()).getClass().getName());
        // This prints Foo1
        java.lang.System.out.println(getNewInstance(new Foo1()).getClass().getName());
 }
}
class Foo{
}
class Foo1 extends Foo{
}

Hope this helps.