Java by API/java.lang/Number
Number.class
<source lang="java">
public class DynamicTypeChecking {
public static void main(final String[] args) { new Integer("0").getClass().isInstance(new Double("1.2").getClass()); Number.class.isInstance(123); Number.class.isAssignableFrom(new Double("1.2").getClass()); }
}
</source>