Question

package MyTest;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;

class Person {
...
}

class Student extends Person {
...
}

public class IntrospectorDemo {

    /**
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        BeanInfo info = Introspector.getBeanInfo(Student.class, Person.class);
        PropertyDescriptor[] props = info.getPropertyDescriptors();
        for (PropertyDescriptor prop : props) {
            System.out.println(prop.getName() + "::" + prop.getPropertyType());
        }
    }

}

I am learning the above code which tells me what is introspector and what is stopClass.
But I don’t understand what is meaning of this? for (PropertyDescriptor prop : props) ?
Usually a for() should be like this: for(i=0;i<100;i++)
Could anyone please help to further explain it? Thanks!

Answer 1

That’s the for each loop syntax, introduced in Java 5.