03 - Java Basics and Code Structure

Eclipse
Netbeans
IntelliJ IDEA 
JDK
JRE
Dr Java

Note: Statements always end in a semicolon

System.out.println("Hello World");

#1.
Public class MyFile {


#2.
public Class MyFile {

Hello, I am Learning "Java"

public class Addition {
	
	
	public static void main(String[] args){  
	int a=10;  
	int b=10;  
	int c=a+b;  
	System.out.println(c);  
	
	}
	
}

A ________ program is a text file that contains a program
written in a programming language. Since it contains ordinary text (stored as bytes) it can not be directly executed (run) 
by the computer system. As a text file, you can print it, 
display it on the monitor, or alter it with a text editor. 

Reserved words: You can find a complete list here: https://docs.oracle.com/javase/tutorial/java/nutsandbolts/_keywords.html

Are all of these reserved words in Java?

1 - but
2 - class
3 - if
4 - main
5 - public
6 - super 
7 - this 

Additional Notes:  It is a specification that provides a runtime environment in which Java bytecode can be executed. It can also run those programs which are written in other languages and compiled to Java bytecode.

The JVM performs the following main tasks:

Loads code
Verifies code
Executes code
Provides runtime environment

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

  //This is a java code snippet  
    public class FirstExample2 {  
    public static void main(String[] args) {  
    /* Let's declare and 
     print variable in java. */  
        int i=10;  
        System.out.println(i);  
    }  
    }  

_______ is a keyword. The _______ keyword is used to ______ built-in and 
user-defined packages into your java source file so that your class can 
refer to a class that is in another package by directly using its name

1-class MONEY
2-class money
3-final int BANK_DEPOSIT
4-int bankDeposit
5-int BankDeposit

Important note: When the Java interpreter is running on a computer system, that system acts just like a hardware Java bytecode processor. It is a Java Virtual Machine.

To describe this in another way, "src" folder contains the 
human readable code and "bin" contains the ______________
___________________________________________________________.

public class Example { 
  
    public static int multiply(int a, int b) 
    { 
        return a + b; 
    } 
  
    public static void main(String[] args) 
    { 
        int x = 2; 
        int y = 5; 
  
        // the variables x and y are arguments 
        int sum = multiply(x, y); 
  
        System.out.println("SUM IS: " + sum); 
    } 

package com.example.works;

public class ArithmeticOperations {

    public static int add(int x, int y) { //x, y are parameters here
        return x + y;
    }

    public static void main(String[] args) {
        int x = 10;
        int y = 20;
        int sum = add(x, y); //x, y are arguments here
        System.out.println("SUM IS: " +sum);
    }

}