Biblioteca Java - Rev 32

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/*
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package exemple.reflexie.clase;

import exemple.reflexie.app.Car;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

/**
 *
 * @author Mihai Hulea mihai.hulea@aut.utcluj.ro
 */
public class InspectClass {
   
    public static void describeInstance(Object object) {
    Class<?> clazz = object.getClass();

    Constructor<?>[] constructors = clazz.getDeclaredConstructors();
    Field[] fields = clazz.getDeclaredFields();
    Method[] methods = clazz.getDeclaredMethods();

    System.out.println("Description for class: " + clazz.getName());
    System.out.println();
    System.out.println("Summary");
    System.out.println("-----------------------------------------");
    System.out.println("Constructors: " + (constructors.length));
    System.out.println("Fields: " + (fields.length));
    System.out.println("Methods: " + (methods.length));

    System.out.println();
    System.out.println();
    System.out.println("Details");
    System.out.println("-----------------------------------------");

    if (constructors.length > 0) {
      System.out.println();
      System.out.println("Constructors:");
      for (Constructor<?> constructor : constructors) {
        System.out.println(constructor);
      }
    }

    if (fields.length > 0) {
      System.out.println();
      System.out.println("Fields:");
      for (Field field : fields) {
        System.out.println(field);
      }
    }

    if (methods.length > 0) {
      System.out.println();
      System.out.println("Methods:");
      for (Method method : methods) {
        System.out.println(method);
      }
    }
  }
    static boolean[] checkModifiers(int modifiers){      
        boolean[] b = new boolean[11];
        b[0] = Modifier.isAbstract(modifiers);        
        b[1] = Modifier.isFinal(modifiers);
        b[2] = Modifier.isInterface(modifiers);
        b[3] = Modifier.isNative(modifiers);
        b[4] = Modifier.isPrivate(modifiers);
        b[5] = Modifier.isProtected(modifiers);
        b[6] = Modifier.isPublic(modifiers);
        b[6] = Modifier.isStatic(modifiers);
        b[7] = Modifier.isStrict(modifiers);
        b[8] = Modifier.isSynchronized(modifiers);
        b[9] = Modifier.isTransient(modifiers);
        b[10] = Modifier.isVolatile(modifiers);
        return b;
    }
   
    public static void main(String[] args) throws Exception{
        Car myCar = new Car();
               
       // Class c = Car.class;
       // describeInstance(myCar);
       /* System.out.println("Class name:"+c.getName());
       
        Class s = c.getSuperclass();
        System.out.println("Superclass name:"+s.getName());      
       */
       
        System.out.println("My car is:"+myCar);
       
        Method privateMethod = Car.class.
            getDeclaredMethod("setSpeedLimit", Integer.class);
        privateMethod.setAccessible(true);
        privateMethod.invoke(myCar, 300);
       
        System.out.println("My car is:"+myCar);
       
        Field privateField = Car.class.
            getDeclaredField("maxSpeed");
        privateField.setAccessible(true);
        Integer fieldValue = (Integer) privateField.get(myCar);
       
        System.out.println("Max car speed is = " + fieldValue);
       
        Car o = (Car)Car.class.getConstructor().newInstance();
        describeInstance(o);
        o.accelerate();
             
    }
}