access-modifiers

Need to have more understanding about the private variables and inheritance. Earlier my understanding was if there is field in a class and when I'm inheriting the class, the fields that is not restricted by access(private variables) will be there in the inherited class. But I'm able use the private variables in base class if there is a public g/setter method. How can I imagine a private variable in a base class.? class A { private int a; public A(int a) { this.a = a; } public int getA() {return a;} } class B extends A { public B(int b) { super(b); } public int getB() {return getA();} } int

I know I can use reflection to invoke a private method, and to get or set the value of a private variable, but I want to override a method. public class SuperClass { public void printInt() { System.out.println("I am " + getClass() + ". The int is " + getInt()); } private int getInt() { return 1; } } public class SubClass extends SuperClass { public static void main(String[] args) { (new SubClass()).printInt(); } public int getInt() { return 2; } } I want the main method in SubClass to print out 2 , but it prints out 1 . I've heard this can be done through reflection, but I can't figure out how

Every time I write method in Java with more keywords than public void , every time I write it another way. Sometimes " static public void " sometimes " public static void " etc. What is the best order (best practices) for these keywords? [ abstract/static ] [ final ] [ synchronized ] [ public/private/protected ] [ result_type ] ??? Nandkumar Tekale In theory it does not matter if you say public static final or final static public, but if you follow the usual convention, other people will able to read your code more easily. Here is the preferred order: [ public | protected | private ] static

As part of the Roslyn documentation on GitHub, there's a page called Language feature implementation status , with planned language features for C# and VB. One feature I couldn't wrap my head around was private protected access modifier: private protected string GetId() { … } There is also a page of C# Language Design Notes , which explains many new features, but not this one. Eric Lippert said in a comment : Your error is in thinking of the modifiers as increasing restrictions. The modifiers in fact always decrease restrictions. Remember, things are "private" by default; only by adding

I would like to protect my public method from being called by a user. Because I'm calling the action from an ajax script I can't use any access modifiers, (private, protected etc). Also, [HttpPost] doesn't stop the user from doing a fake request. Anyone got a solution? Thanks Create an action filter that allows action methods to be called by AJAX only namespace MyFilters { [AttributeUsage(AttributeTargets.Method)] public class AjaxOnlyAttribute : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { if (!filterContext.HttpContext.Request

Can anybody explain what the default access modifier is for an explicit no-arg constructor (and other constructors)? Constructors are the same as methods in this respect - if you don't give an explicit public, private or protected then the constructor gets the default "package private" visibility. It can be called from within the same class or from any other class in the same package, but not from subclasses in a different package (so if a class has only package-visible constructors then any subclasses must be in the same package). A private constructor prevents any other class from

I have an abstract class, relation in package database.relation and a subclass of it, Join , in package database.operations . relation has a protected member named mStructure . In Join : public Join(final Relation relLeft, final Relation relRight) { super(); mRelLeft = relLeft; mRelRight = relRight; mStructure = new LinkedList<Header>(); this.copyStructure(mRelLeft.mStructure); for (final Header header :mRelRight.mStructure) { if (!mStructure.contains(header)) { mStructure.add(header); } } } On lines this.copyStructure(mRelLeft.mStructure); and for (final Header header : mRelRight.mStructure)