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Java 2021-09-06 10:59:02
Abstarction
Abstraction: Hiding the implementation details, concentrating on essentials things, without worrying about the details ■ In java, abstraction is achieved via abstract class or interface ■ Abstraction cannot exist without inheritance 3.1. Abstract cl... Add solution -
Java 2021-09-02 23:46:01
upcasting vs downcasting in java
Upcasting is casting a subtype to a supertype, going up in the inheritance tree. It is done implicitly in order to use method available on any interface/class, the object should be of same class or of class implementing the interface. WebDriver d... Add solution -
Shell/Bash 2021-08-30 09:58:01
install handbrake ubuntu
# From the command line, add the official releases PPA to your system. sudo add-apt-repository ppa:stebbins/handbrake-releases sudo apt-get update # Install HandBrake. sudo apt-get install handbrake-cli handbrake-gtk # Run HandBrakeCLI to use HandBrake ... Add solution -
Java 2021-08-28 13:41:01
difference between hashmap and map java
Hash map: -> It is the implementation of map interface. -> It can contain null values and keys. -> It doesn't maintain input order. Map: -> It is an interface -> Map has two implementation -> Tree Map -> Hash Map -> Tr... Add solution -
Shell/Bash 2021-08-28 02:13:02
ssh operation timed out mac
$ ping server_address $ traceroute server_address $ ssh -v login_name@server_address # Please check that you are connecting # to your targeted server with the right network interface. # If you suspect a legitimate or accidental filtering, # you will be a... Add solution
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