Best Programming Languages For Backend Web Development

Normally, users are more likely to notice what’s served before their eyes and not take note of what goes behind the scenes. Backend web development involves the part of coding which is not seen by the user.

1. PHP

PHP starts the list on basis of its popularity and widespread use.

Almost all active web users have come across some sort of implementation of PHP code, considering about 75% of websites use PHP. PHP has come a long way since its creation way back in 1994.

2. Python

Gone are the days when Python was restricted to desktop programming. Now, in the realm of backend web development, python is rising among the ranks. Most server-side programmers nowadays have adopted Python as a substitute for PHP

3. Java

Just like Python, Java has risen to be a multipurpose language. It’s used for desktop software development, android development and most importantly, for web development. As much as one may love the newer technologies such as Node.js

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👻 java n-ide
java programing language
Java for android
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What Is java?
Java is a popular programming language, created in 1995.

It is owned by Oracle, and more than 3 billion devices run Java.

👍👍 It is used for:

Mobile applications (specially Android apps)
Desktop applications
Web applications
Web servers and application servers
Games
,Database connection And much, much more!
😊 Why Use Java?
Java works on different platforms (Windows, Mac, Linux, Raspberry Pi, etc.)
It is one of the most popular programming language in the world
It is easy to learn and simple to use
It is open-source and free
It is secure, fast and powerful
It has a huge community support (tens of millions of developers)
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Java Quickstart
In Java, every application begins with a class name, and that class must match the filename.

Let's create our first Java file, called MyClass.java, which can be done in any text editor (like Notepad).

The file should contain a "Hello World" message, which is written with the following code:
Example
MyClass.java

public class MyClass {
public static void main(String[] args) {
System.out.println("Hello World");
}
}
output:
Hello world

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➡ public :- again means that anyone can access it.
➡ static :- means that you can run this method without creating an instance of Main.
➡ void :- means that this method doesn't return any value.
➡ main :- is the name of the method.
➡ System:- is a pre-defined class that Java provides us and it holds some useful methods and variables.
➡out :- is a static variable within System that represents the output of your program (stdout).
➡println :- is a method of out that can be used to print a line.


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👽Object - Objects have states and behaviors. Example: A dog has states
- color, name, breed as well as behaviors – wagging the tail, barking,
eating. An object is an instance of a class.
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👽 Class - A class can be defined as a template/blueprint that describes the
behavior/state that the object of its type support.
Example👇👇👇

public class Dog {
String breed;
int age;
String color;

void barking() {
}

void hungry() {
}

void sleeping() {
}
}
A class can contain any of the following variable types.
👻👻👻👻👻👻👻👻👻👻
👽 Local variables - Variables defined inside methods, constructors or blocks
are called local variables. The variable will be declared and initialized within
the method and the variable will be destroyed when the method has completed.
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👽 Instance variables - Instance variables are variables within a class but outside any method.
These variables are initialized when the class is instantiated. Instance variables can be accessed
from inside any method, constructor or blocks of that particular class.
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👽 Class variables - Class variables are variables declared within a class, outside any method, with the static keyword.
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👇👇👇👇👇👇👇👇👇👇
A loop statement allows us to execute a statement or group of
statements multiple times and following is the general form of a
loop statement in most of the programming languages
Loop & Description
1 while loop👽

Repeats a statement or group of statements while a given condition is true. It tests the condition before executing the loop body.
2 for loop👽

Execute a sequence of statements multiple times and abbreviates the code that manages the loop variable.
3 do...while loop👽

Like a while statement, except that it tests the condition at the end of the loop body.

👉🏿👉🏿👉🏿👉🏿👉🏿Loop Control Statements

Loop control statements change execution from its normal sequence. When execution leaves a scope, all automatic objects that were created in that scope are destroyed.

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👇👇👇👇👇👇👇👇👇👇
Enhanced for loop in Java
Syntax

Following is the syntax of enhanced for loop -

for(declaration : expression) {
// Statements
}
👉🏿Declaration - The newly declared block variable, is of a type compatible
with the elements of the array you are accessing.

👉🏿Expression - This evaluates to the array you need to loop through. The
expression can be an array variable or method call that returns an array.

👻Example

public class Test {

public static void main(String args[]) {
int [] numbers = {10, 20, 30, 40, 50};

for(int x : numbers ) {
System.out.print( x );
System.out.print(",");
}
System.out.print("\n");
String [] names = {"Nati", "Elsa", "Dagi", "Yonas"};

for( String name : names ) {
System.out.print( name );
System.out.print(",");
}
}
}

Output👻👻👻

10, 20, 30, 40, 50,
Nati, Elsa, Dagi, Yonas,

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☯how to edit the source code of any application☯

👉Source code is the back-end of an application which interact with the user by means of user interface

👉advantage of source code editing

- modify app name
- modify app icon
-change background image
-remove advertisement
-remove unwanted permission
- change application audio,picture,language
-make an app move to sd card

👉 in order to do all of this thing u need an app called "apk editor" and sometimes rooting is needed

❇️👉modify app name

1,👉select target app by clicking on"select apk from app" & then select "apk creator"
2,👉then click at "full edit"
3,👉then click on app name and give it the name that u want
4,👉finally click "save button"

💠if u want to see the modified app just uninstall the previous app and install the saved app

❇️👉Remove ad

1,👉 Select target app by clicking at 'Select Apk from App', then selecting ur desire app, and then click at 'Full Edit'.
2,👉 Click 'Resource' tab after editable resource shown, and then enter 'layout' folder by clicking at the item. Click 't' and it will show the content of activity_main.xml.
3,👉 remove the AdActivity in AndroidManifest.xml:
4,👉After all the modifications, click save button in the upper right corner. After a while, we will be told that the modified apk is in some place.

❇️👉Make an app move to sd card

1,👉 Select target app by clicking at 'Select Apk from App', then selecting apk creator, and then click at 'Full Edit'.
2,👉 Click 'Manifest' tab, and then click at the line of manifest (Generally should be line 2)
3,👉 Click at '+' icon to add a key and value (android:installLocation="auto")
4,👉 change 'auto' to
'preferExternal') and then click 'OK'; when return to previous dialog, click 'Save'
5,👉 Click save button in the upper right corner. After a while, we will be told that the modified
apk is in some place.

✳️we uploaded the applications on our channel
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