we have 4 access modifier public, protected, private and no access specifier mentioned.
--public is accessed inside the class,inside the package,outside the class,outside the package and even in subclass and non subclass.
--private is accessible only inside the same class and other all places it is restricted.
--no access specifier it is accessible from the same class, subclass non subclass from the same package but not outside the package.
--protected is accessible in same class , subclass, non subclass of the same package other package subclass but not the other package non subclass.
Follow the below example with the comments
protectedclass.java
package p1;
public class protectedclass {
int i =10;
private int privatev=100;
protected int protectedv=1000;
public int publicv=10000;
}
subclass.java
package p1;
public class subclass extends p1.protectedclass {
subclass(){
System.out.println("access default variable "+i);
//System.out.println("access to private variable "+privatev);//private cannot be accessed outside the class
System.out.println("access to protected variable "+protectedv);
System.out.println("acces to public variable "+publicv);
}
}
nonsubclass.java
package p1;
public class nonsubclass {
nonsubclass(){
protectedclass p=new protectedclass();
System.out.println("access default variable "+p.i);
//System.out.println("access to private variable "+p.privatev);//private cannot be accessed outside the class
System.out.println("access to protected variable "+p.protectedv);
System.out.println("acces to public variable "+p.publicv);
}
}
Different package p2 protectedclass.java
package p2;
public class protectedclass extends p1.protectedclass{
protectedclass(){
//System.out.println("access default variable "+i);default access in not valid outside the package
//System.out.println("access to private variable "+privatev);//private cannot be accessed outside the class
System.out.println("access to protected variable "+protectedv);
System.out.println("acces to public variable "+publicv);
}
}
nonsubclass.java
package p2;
public class nonsubclass {
nonsubclass(){
p1.protectedclass p2=new p1.protectedclass();
//System.out.println("access default variable "+p2.i);//does not work in different package
//System.out.println("access to private variable "+privatev);//private cannot be accessed outside the class
//System.out.println("access to protected variable "+p2.protectedv);//proctected does not work in non subclasses
System.out.println("acces to public variable "+p2.publicv);
}
}
>>>Final------------------------------------------------------------------------------------------------------------
