What is the default access modifier in Java

Question

What is the default access modifier for a method or an instance variable if I do not state it explicitly   For example   package flight booking   public class FlightLog       private SpecificFlight flight       FlightLog SpecificFlight flight                this flight   flight            Is the access modifier of this constructor protected or package  Can other classes in the same package  which is flight booking  call this constructor

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Is the access modifier of this constructor protected or package?

I think implicitly your constructors access modifier would be your class's access modifier. as your class has public access, constructor would have public access implicitly

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It depends on the context   When it s within a class   class example1        int a   10     This is package-private  visible within package       void method1      This is package-private as well                -----           When it s within a interface   interface example2        int b   10     This is public and static      void method2       This is public and abstract

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Default access modifier - If a class has no modifier  the default  also known as package-private   it is visible only within its own package  packages are named groups of related classes

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From documentation   Access Levels Modifier        Class    Package    Subclass    World ----------------------------------------------------- public           Y        Y          Y           Y protected        Y        Y          Y           N  Default         Y        Y          N           N private          Y        N          N           N

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Yes  it is visible in the same package  Anything outside that package will not be allowed to access it

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Your constructor s access modifier would be package-private default   As you have declared the class public  it will be visible everywhere  but the constructor will not  Your constructor will be visible only in its package   package flight booking   public class FlightLog    Public access modifier       private SpecificFlight flight       FlightLog SpecificFlight flight     Default access modifier               this flight   flight            When you do not write any constructor in your class then the compiler generates a default constructor with the same access modifier of the class  For the following example  the compiler will generate a default constructor with the public access modifier  same as class    package flight booking   public class FlightLog    Public access modifier       private SpecificFlight flight

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The default modifier is package  Only code in the same package will be able to invoke this constructor

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Here is a code sample which should pretty much sum this up for you    In addition to the below  showing how you can t access a default in another package there is one more thing   Default is not accessible in a subclass if the class that subclasses it is in another package  but it is accessible if the subclass is in the same package   package main   public class ClassA       private int privateVar      public int publicVar      int defaultVar     package main   public class ClassB       public static void main String   args            ClassA a   new ClassA            int v1   a publicVar       Works         int v2   a defaultVar      Works         int v3   a privateVar      Doesn t work           package other   public class ClassC       public static void main String   args            ClassA a   new ClassA            int v1   a publicVar       Works         int v2   a defaultVar      Doesn t work         int v3   a privateVar      Doesn t work

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From a book named OCA Java SE 7 Programmer I      The members of a class defined without using any explicit access   modifier are defined with package accessibility  also called default   accessibility   The members with package access are only accessible to   classes and interfaces defined in the same package

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From Java documentation     If a class has no modifier  the default  also known as package-private   it is visible only within its own package  packages are named groups of related classes     you will learn about them in a later lesson     At the member level  you can also use the public modifier or no modifier  package-private  just as with top-level classes  and with the same meaning   Full story you can read here  Which I wrote recently    http   codeinventions blogspot com 2014 09 default-access-modifier-in-java-or-no html

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The Default access modifier is package-private  i e DEFAULT  and it is visible only from the same package

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Default access modifier is package-private - visible only from the same package

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No  you can t call the default access level to the other package  But you have the access within the package  Follow this link for more details

[java] What is the default access modifier in Java?

Examples related to java

Examples related to access-modifiers