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What is a Java Idiom? | Common Practice Java Programming
 that appear frequently
in varied uses written in that language. Idioms can thus provide superordinate
language features that are not present in the language itself.
The JavaIdiom is a recognizable Java code pattern. It is best described and comprehended
with the assistance of a code sample.
</p>
<br />
<p>OOP (Made up 1960's programming. What applies to this is that everything is abstraction,
They are all a form of abstraction. That is the four pillars of Object Oriented Programmming.
There is only one piler the world is alive. How you understand something.
Abstraction - An under the hood philosphy. Put it under the hood. You don't need to know exactly how it works to use it. You understand that it works
and even what is does, your car goes goes fast. Cylinder firing drive better. </p>
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<h2>What is a Java Idiom? | What can a Child do in Coding Java?</h2>
<p> A child chuck of code can use its parents code.
Encapsulation: Hiding data (in a capsule metaphorically. This is
through the use of private classes, and public getters and setters. Access
modifiers tell you where yo can look in the variable or method. Not in a cyber security level
but you don't want it changing. A getter or setter is required to access the code. This means
that changes are intential because they are private. You don't have access to hidden data unless you
instantiate a getter or setter code. </P>
<h2>What is a Java Idiom? | Common Practice Java Programming</h2>
<p> Inheritance: child to parent relatoinships. Look at this through a zooological perspective. If the
world were a simulation, we'd have many parent classes animals, mammal (cannine, feline, vulpix >
dog, wolf, candid, fox, they stem from a root or parent), reptile, amphiibam
Polymorphism: Poly means many and morphism means for or shape. So it means many shapes.
This is seen in the use of overwriting and
overloading. (just inheritance same as). Take a method from a parent and change it aka overriding.
Overloading is taking a method from yourself or your parent and change what it accepts. You can it's
arguments. You want to make a method. you want it to add together the ages of your guests.
If you have 3 guests. take the arguments. Now have 4 guests. Methods only accepts 3 integers. You
can overload it so that it does the same same but accepts different arguments. Takes their names and
add thems together and it would be overlaoding it and overiding it. Concatenation. </p>
<h2>What is a Java Idiom? | Common Practice Java Programming</h2>
<p> Java is not objectively fully OOP - You program with objects. Java has testy things called primatives.
They aren't objects. But because they exist, Java is not fully OOP. INT, Booean, Doubles, Short, Long,
Boolean Int, Float, Char, Varchar.
Use an Int for any whole numbers. Use a double if it includes decimals. Maybe use CHAR short for character
for single letters. You never need to code in CHAR, SHORT, LONG, or FLOAT. Bit. use short. If your using Int don't
need to use long. INT, Boolean, and Double.
Googledocs not be capitalized.
Capitalization is important in Java.
Not HTML.
Capital i INT and lowercase I int are completely different.
HackerRank is really useful for coding practice and leet code.
Strings are objects:
SQL:
VarChar is really string text and long text.
So why do they all exist? Each Primative has a different memory allocation size. A certain number of bits, that
they can take up. You're limmieted technically in the numbers that they can use.
What is the size of INT?
INT is 32 bits. -2 to 2.4 billion, but no decimals.
Double is a lot bigger and can do decimals.
Don't worry about the other characters so much.
The other unused primatives only really matter on massive level enterprise probjects where a single bit
of saved memory is lots and lots of money.
What is a Java Idiom? | Common Practice in Java Programming
Strongly typed is everything in Java. When an object is created it needs a data type
typed into it. Or else your IDE will get )
Spring Tools | IntelliJ auto code filler Saves Typos and Time.
You need the Main Method in Java to get anything or everything to work. Actually correction you can have 2 Mains but
it
Intellij is a coding autocorrection code/plugin/extension.
Public Static Void Main (String Array Args)
Main (hit control and spacebar). type main and it puts it in.
When you create a class, you can click create a method.
It's as simple as typing in main and hitting control spacebar.
You can only use one Main per project. If you create to mains than the program will get very angry.
and give error messages. system.out.println is how things print in the line. syso control space and it'll do it for you.
If you want to complete a boolean or char. if you don't do println it will print it all out
non neatly or grossly into a lines messy "line soup cluster"
Everything in Java ends with a semicolon Srings go between double quotes . String is written with a captial "S". You can scroll on the bar to where the error is on the bar. It's very precise. It literally tells you where the bug is. SQL the error is more ambiguos. (Idea create a better SQL relational database language. when you put a datatype that is instantiation. Potato is an integer. on line 13. Potato is an integer. You can redefine it Int potato = 1 on line 6. Defined it and referenced it it to 2. You can change the datatype but you can't do it through reinstantiation You can change the value or arguments of the string. Cheese = something else. What is a Java Idiom | Variables and Heap Memory Created a reference variable of type cheese. for Strings it's the String pool within heap memory. This is a cheesy boy. You won't run out of memory at first. When with clients you don't want to create a new variable every time you wan't to be more sparing with memory usage. Garbage collectors get rid of redundent code. Arithmetic operators include the standard plus. What does potato = 1 (on line 6). The location arthithmetic operators matter. Where you put it matters (everything counts in some way in logic but we weight things. You never know though).
Application engineering is in the computer science subfield > Engineering > Software engineering aka application programming.
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