remove apache2 from ubuntu
#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 apache2remove apache ubuntu
sudo apt autoremove
sudo apt remove apache2
sudo apt-get purge apache2 apache2-utils apache2-bin apache2.2-commonjava string type
A String variable contains a collection of characters surrounded by double quotes:
String greeting = "Hello";
----------------
Most String Methods :
1- String txt = "Hello World";
System.out.println(txt.length());// Outputs is 11
2- System.out.println(txt.toUpperCase()); // Outputs "HELLO WORLD"
System.out.println(txt.toLowerCase()); // Outputs "hello world"
3- String txt = "Please locate where 'locate' occurs!";
System.out.println(txt.indexOf("locate")); // Outputs 7
4- String firstName = "John";
String lastName = "Doe";
System.out.println(firstName + " " + lastName); // Outputs "John Doe"Copyright © 2021 Codeinu
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