Access specifier keywords used in Apex Programming
We can also call public, private, protected & global as access modifiers. Apex allows these 4 types of modifiers.
1. public
This keyword is used to Defines a class or method or variable that can be used by any Apex in this application or namespace.
Example
public class Foo {
public void quiteVisible();
private void almostInvisible();
}
2. private
This key word is used to Defines a class/method/variable that is only known locally, within the section of code in which it is defined. This is the default scope for all methods and variables that do not have a scope defined.
Example
public class OuterClass {
private static final Integer MY_INT;
}
3. protected
This keyword defines a method/variable that is visible to any inner classes in the defining Apex class.
Example
public class Foo {
public void quiteVisible();
protected void lessVisible();
}
4.global
Defines a class, method, or variable that can be used by any Apex that has access to the class, not just the Apex in the same application.
Example
global class myClass {
webService static void
makeContact(String lastName) {
// do some work
}
}
See reference to understand more about apex programming access modifiers.
It would be better to highlight keywords with a different colour to avoid confusion in syntax/example of classes.