Welcome to the website of Davis Fiore

Reflection is an API used to inspect and manipulate classes. The package is java.lang.reflect

Here are some things you can do with it.

You can get the class name:

	String name = Integer.class.getName();
	System.out.println(name);

Get the superclass name:

	String superclassName = Integer.class.getSuperclass().getName();
	System.out.println(superclassName);

Check the access modifier of the class:

	int modifier = Integer.class.getModifiers();
	System.out.println(Modifier.isPublic(modifier));

Get the method names:

	Method[] methods = Integer.class.getMethods();
		
	for (Method method : methods)
		System.out.println(method.getName());

Get the method's return type:

	Method[] methods = Integer.class.getMethods();
		
	for (Method method : methods)
		System.out.println(method.getReturnType());

Get the method's parameters:

	Method[] methods = Integer.class.getMethods();
		
	for (Method method : methods) {
		Class<?>[] params = method.getParameterTypes();
			
		for (Class<?> param : params)
			System.out.println(param.getName());
	}

Get the constructor:

	Constructor constructor = String.class.getConstructor();

Get a constructor with parameters:

	Constructor constructor = String.class.getConstructor(new Class[] {String.class});

Run a constructor:

	Constructor constructor = String.class.getConstructor(new Class[] {String.class});
	String str = constructor.newInstance("example");
	System.out.println(str);

Access a private member variable:

	Integer i = new Integer(6);
	Field field = Integer.class.getDeclaredField("value");
	field.setAccessible(true);
	int value = (int) field.get(i);

Invoke a method:

	String str = "example";
	Method method = String.class.getDeclaredMethod("hashCode");
	System.out.println(method.invoke(str));

Invoke a method with parameters:

	String str = "example";
	Method method = String.class.getDeclaredMethod(
			"equalsIgnoreCase", String.class);
	System.out.println(method.invoke(
			str, new Object[] {new String("example")}));