Java examples: Enhanced For Loop

	public static void enhancedForLoop(){
	int[] arr = {1, 2, 3, 4, 5, 6, 7, 8, 9};
	System.out.println("\nEXAMPLE: Enhanced For Statement");
	for (int temp: arr){ // Create a temporary variable, same type as array values. For
	// loop assign array value to the temporary variable
	System.out.println("Enhanced = " + temp);
	}
	}

view raw Java examples: Enhanced For Loop Statement.java hosted with ❤ by GitHub

Java examples: Switch Statement

	public static void witchStatment(int num) {
	System.out.println("\nEXAMPLE: Switch Statement");
	switch(num){ //Check the value
	case 0:
	System.out.println("Case = " + num); // Execute this if 'case' matches the 'value'
	break; // Stop the statement
	case 1:
	System.out.println("Case = " + num); // Execute this if 'case' matches the 'value'
	break; // Stop the statement
	case 2:
	System.out.println("Case = " + num); // Execute this if 'case' matches the 'value'
	break; // Stop the statement
	case 3:
	System.out.println("Case = " + num); // Execute this if 'case' matches the 'value'
	break; // Stop the statement
	case 4:
	System.out.println("Case = " + num); // Execute this if 'case' matches the 'value'
	break; // Stop the statement
	default:
	System.out.println("Default = " + num);
	}
	}

view raw Java examples: Switch Statement.java hosted with ❤ by GitHub

Java examples: While Loop vs ‘do’-while loop

While Loop

	public static void whileLoop(){
	System.out.println("\nEXAMPLE: While Loop");
	int num = 0;
	while(num <= 20) { // Check the while condition first, Then execute the loop
	// Then while 'l' is less than or equal to '0'
	System.out.println("num = " + num);
	num++; //increment 'l' by 1
	}
	}

view raw Java examples: WhileLoop.java hosted with ❤ by GitHub

‘do’-while loop

	public static void doWhileLoop() {
	System.out.println("\nEXAMPLE: Do While Loop");
	int num = 0;
	do {
	// DO the work... Execute the loop first
	System.out.println("num = " + num);
	num++; //increment 'l' by 1
	} while(num <= 20); // Check the conditions
	}

view raw Java examples: 'do'-while loop.java hosted with ❤ by GitHub

Java examples: Fizz Buzz

for (int i = 0; i <= l; i++){

    boolean f = i % 3 == 0, b = i % 5 == 0;

    String output = f ? b ? i + " FizzBuzz" : i + " Fizz" : b ? i + " Buzz" : i + "" ;

    System.out.println(output);

}

Calculating average using a perl script

Ok here is the basic perl script for calculating average.

I assume you know how to run the script if you dont ( I will put up a tutorial later so for now dig around in other forms )

Perl Script for calculating average from another file

#!/usr/bin/perl
#calculate averate from a file

use strict;

my $total = 0;
my $count =0;
while (my $line = <>) {
      $total +=$line;
      $count ++=;
}
print "Average = ", $total / $count, "\n";

So the  explaniation for the above code is…

use strict; – allow to find simple mistakes

to find the $average need to calculate

my $total

and the total number of lines

my $count

At the begining of the loop these values are 0.

therefore define the inital value

my $total  = 0;
my $count =0;

So now what you need to do this read each line andadd each value consequtively.

while (my $line = <>) {
   $total += $line;
   $count ++=;
 }
print "Average = ", $total / $count, "\n";

Read the first line.  Then add then and the value read to the total inital value  of 0.

   $total = $line + $total

calculate the total

   $count = $count + 1

calculate the total number of lines read
this can be written in short form as below

   $total += $line;
   $count ++=;

then go back in loop adding value conseutively until there are no more lines to read and then print the line

print "Average = ", $total / $count, "\n";

Hope this is clear I will put a anotated diagram up with more explanation later on.

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Java Tutorial – Installing JAVA SE Development Kit (JDK)

Before writing a JAVA program first need to download JDK which allows write JAVA and compile the code.

1. Download appropriate JAVA SE Development Kit (JDK) for your operating system
2. Run the Installation
3. Navigate to C:\Program Files\Java\jdk1.7.0\bin (this location may change in any instance you want to navigate to bin in JDK installation) make sure you have the .exe files there.
4. copy the location of the bin C:\Program Files\Java\jdk1.7.0\bin
5. Right click on computer and select properties > Advanced System settings > Environment variables
6. Click on New and Variable name as Path and variable value as location of the bin so in my case it would be C:\Program Files\Java\jdk1.7.0\bin
7. Click OK  OK
8. To make sure compiler is working and ready for JAVA programming open cmd and run JavaC and if Java Compliler is working should get some random code as below

Special thanks to Bucky Roberts for the clear accompanying video tutorial