Java Reflection - Class.cast() Examples

package com.logicbig.example.clazz;

import java.util.HashSet;
import java.util.LinkedHashSet;

public class CastExample {

    public static void main(String... args) {
        LinkedHashSet<String> lhs = new LinkedHashSet<>();
        HashSet hs = HashSet.class.cast(lhs);
        System.out.println(hs.getClass());
    }
}

package com.logicbig.example.clazz;

public class CastExample2 {

    public static void main(String... args) {
        Sup sup = new Sup();
        Sub sub = safeCastTo(sup, Sub.class);
        System.out.println(sub);

        Sub sub2 = new Sub();
        Sup sup2 = safeCastTo(sub2, Sup.class);
        System.out.println(sup2);

        Other other = new Other();
        Sup sup3 = safeCastTo(other, Sup.class);
        System.out.println(sup3);
    }

    public static <T> T safeCastTo(Object obj, Class<T> to) {
        if (obj != null) {
            Class<?> c = obj.getClass();
            if (to.isAssignableFrom(c)) {
                return to.cast(obj);
            }
        }
        return null;
    }

    public static class Sup {
    }

    public static class Sub extends Sup {
    }

    public static class Other {

    }
}