Answers for "can method of subclass access private variables of superclass"

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uninstall apache2 ubuntu

#How to completely remove Apache2 on Ubuntu 20.04 and similar distributions.

#stop the apache2 service 
$ sudo systemctl stop apache2 

#remove apache2 packages
$ sudo apt-get purge apache2 apache2-utils apache2-bin apache2.2-common

# cleanup
$ sudo apt-get autoremove

# check if the apache has been removed:
#1- following command line should return a blank line
$ which apache2   

# 2- following command line should return apache2: Failed to start apache2.service: Unit apache2.service not found.
$ sudo systemctl start apache2  

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Posted by: Guest on May-19-2021

Completely uninstall apache2

$sudo service apache2 stop

$ sudo apt-get purge apache2 apache2-utils apache2.2-bin apache2-common
$ sudo apt-get autoremove

$ whereis apache2

Posted by: Guest on July-16-2021

Source

can method of subclass access private variables of superclass

public class Base {

    private int x;  // field is private

    protected int getX() {  // define getter
        return x;
    }

    protected void setX(int x) {  // define setter
        this.x = x;
    }
}
//Then you would use it in your child class like this:
class Child extends Base{

    void foo() {
        int x = getX(); // we can access the method since it is protected.
        setX(42);  // this works too.
    }
}

Posted by: Guest on July-27-2020

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