ADDITIONAL SYSTEM INFORMATION :
Tested in jdk1.8.0_51.
Won't work in jdk11.04, either.

A DESCRIPTION OF THE PROBLEM :
In "Introspector.getTargetPropertyInfo" method, it only support primitive "boolean" type.
                    if (argCount == 0) {
                        if (name.startsWith(GET_PREFIX)) {
                            // Simple getter
                            pd = new PropertyDescriptor(this.beanClass, name.substring(3), method, null);
                        } else if (resultType == boolean.class && name.startsWith(IS_PREFIX)) {
                            // Boolean getter
                            pd = new PropertyDescriptor(this.beanClass, name.substring(2), method, null);
                        }
                    }


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Define a class with a public method of type "Boolean".

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
print "class" and "isFirst".
ACTUAL -
print "class"

---------- BEGIN SOURCE ----------
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;

class Child {
    public Boolean isFirst() {
        return true;
    }
}

public class JdkBug {
    public static void main(String[] args) {
        try {
            BeanInfo beanInfo = Introspector.getBeanInfo(Child.class);
            // Only get "class" property
            for (PropertyDescriptor propertyDescriptor: beanInfo.getPropertyDescriptors()) {
                System.out.println(propertyDescriptor.getName());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
---------- END SOURCE ----------

FREQUENCY : always