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Learn Java in an easy and entertaining way

Video 1

Getting startedwith Java

The goal of this course is to teach you how to

program in Java. From the very basics, through

lots of exercises, you will get to an advanced level where you can become an expert Java developer.

The course will cover Getting started with Java Sorting elements in Java

Control structures Generics

NetBeans tips and tricks Variations for storing objects

Basic algorithms Handling exceptions

Arrays File handling

Functions and structured programming

Enums

Object-oriented programming in Java

Using external libraries in our programs

Handling dates and times

In this video

1. A quick intoduction to Java

2. Install NetBeans

3. Create our first project (Hello, World!)

4. Variables and types

5. Input/output and calculations

6. Conditions (if)

7. Review exercise

A quick intoduction to Java

In the TOP 3 (if not the most popular)

3 billion devices run…

Platform independency (writeonce, run anywhere)

Lots of well paying jobs Wide usability

Java is popular

Java as a tree

Basic computer skills

Basic computer skills

Programming in Java

Basic Java tools

Basic computer skills

Programming in Java

Basic Java tools

Mobile appsAndroid

Java ME (cards, TV…)

Android has the highest, 60% market share among mobile platforms worldwide.

Basic computer skills

Programming in Java

Basic Java tools

Mobile apps

Desktopapps

Android

Games

Java ME (cards, TV…)

Software tools

Scientific research

Basic computer skills

Programming in Java

Basic Java tools

Mobile apps

Desktopapps

Enterprise (”web”) apps

Android

Games

Java ME (cards, TV…)

90% of Fortune 500

companies use Java.

Software tools

Banks

Scientific research

E-commerce applications

Backend services

Basic computer skills

Programming in Java

Basic Java tools

Mobile apps

Desktopapps

Enterprise (”web”) apps

Android

Games

Java ME (cards, TV…)

Software tools

Programming in Java

Banks

Scientific research

E-commerce applications

Backend services

Basic Java tools

In this course

Travelling to Europe...

Travelling to Europe...

Pretty girl!

Pretty girl!

Non capisco niente!

Travelling to Europe...

Non capisco niente!

???

Travelling to Europe...

Translate (compile) the message...

Compiler

Translate (compile) the message...

Compiler

Pretty girl!...Bella ragazza!

Translate (compile) the message...

Pretty girl!...Bella ragazza!

Compiler

Interpreter

Interpret the message...

Interpret the message...

I speak English AND Italian!

Interpreter

Interpret the message...

Pretty girl!

Interpreter

Interpret the message...

Lui dice: „Bella ragazza”.

Pretty girl!

Interpreter

Interpret the message...

Lui dice: „Bella ragazza”.

Pretty girl!

Interpreter

Java style (platform independence)

Java style (platform independence)

Compiler

Java style (platform independence)

Prettygirl!

Compiler

Java style (platform independence)

Prettygirl!…

Compiler

Java style (platform independence)

Prettygirl!…Bela

knabino!

Compiler

Java style (platform independence)

Interpreter

Compiler

I speak ItalianAND Esperanto.

I speak FinnishAND Esperanto.

Prettygirl!…Bela

knabino!

Java style (platform independence)

Interpreter

Compiler

Lui dice: „Bella ragazza”

Prettygirl!…Bela

knabino!

Java style (platform independence)

Interpreter

Compiler

Prettygirl!…Bela

knabino!

Lui dice: „Bella ragazza”

Java style (platform independence)

Interpreter

Compiler

Hän sanoo: „Kaunis tyttö”

Prettygirl!…Bela

knabino!

Lui dice: „Bella ragazza”

Java style (platform independence)

Interpreter

Compiler

Hän sanoo: „Kaunis tyttö”

Prettygirl!…Bela

knabino!

Lui dice: „Bella ragazza”

Java style (platform independence)

Interpreter

Prettygirl!…Bela

knabino!Byte code

Compiler

Hän sanoo: „Kaunis tyttö”

Lui dice: „Bella ragazza”

Java style (platform independence)

Interpreter

Prettygirl!…Bela

knabino!Byte code

Hän sanoo: „Kaunis tyttö”

Lui dice: „Bella ragazza”

Compiler

Virtualmachine

Virtualmachine

What do we need to startJava programming?

What do we need to startJava programming?

JRE

What do we need to startJava programming?

JRE

IDE

What do we need to startJava programming?

JRE

IDE

JDK

What do we need to startJava programming?

JRE

IDE

JDK

JVM

What do we need to startJava programming?

JRE

IDE

JDK

JVM

NetBeans

What do we need to startJava programming?

JRE

IDE

JDK

JVM

NetBeans

Eclipse

Java Development Kit(JDK)

Java Runtime Environment(JRE)

Java VirtualMachine

(JVM)

Integrated DevelopmentEnvironment

(IDE)NetBeans Eclipse

Variables and types

Variables and types

Variables and types

Shirts T-shirts

Variables and types

Underwear

Shirts T-shirts

Java variables and types

Java variables and types

All types

Java variables and types

All typesPrimitive types

Java variables and types

All typesPrimitive types Classes

Java variables and types

All typesPrimitive types ClassesNumbers

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Boolean

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Boolean

Integer

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Boolean

Integer Real

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Boolean

Integer RealByte

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Boolean

Integer RealByteShort

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Boolean

Integer RealByteShort

Long

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Boolean

Integer RealByteShort

LongInt

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Boolean

Integer RealByteShort

LongInt

Float

Java variables and types

All typesPrimitive types ClassesNumbers

Char

Boolean

Integer RealLong

ByteShort Float

DoubleInt

Replace the value of 2 variables! Don’t write numbers! Don’t change the existing lines, only include new ones!

public class Replace { public static void main(String[] args) { int first = 7; int second = 19; // write something here!!! System.out.println(”first=”+first+” second=”+second); }}

Value replacing exercise

Glass exercise

Glass exercise

?

Glass exercise

Glass exercise

Glass exercise

Glass exercise

Glass exercise

Glass exercise

Input/output and calculations

Temperature exercise Write a program that reads in an integer value

denoting a temperature value in Celsius grade.

Calculate and print the Fahrenheit grade!

What do we not know?– How to read in a number– How to make calculations

° F=95 ° C+32

Boiling exercise Write a program that reads in a temperature value

(in Celsius) and prints out if the water is boiling at the specified temperature!

What do we not know?– How to run a part of code based on a condition

100 °C

Boiling and freezing exercise Write a program that reads in a temperature value (in

Celsius), and prints out whether the water is boiling or freezing or at normal state at the specified temperature!

What do we not know?– Joining if’s

0 °C 100 °C

Logic operators

Logic operators

&&

||

!

True, if both conditions are true.

Logic operators

&&

||

!

True, if both conditions are true.

True, if either condition is true.

Logic operators

&&

||

!

True, if both conditions are true.

True, if either condition is true.

Negate:

Logic operators

&&

||

! makes true out of false

True, if both conditions are true.

True, if either condition is true.

Negate:

Logic operators

&&

||

!

and false

makes true out of false

out of true.

Conditions (if)

Multiple if-else if-else if-…-else

Multiple if-else if-else if-…-else Let’s imagine a sausage! The sausage will represent all the values.

Multiple if-else if-else if-…-else Let’s imagine a sausage! The sausage will represent all the values.

Multiple if-else if-else if-…-else Let’s imagine a sausage! The sausage will represent all the values.

Multiple if-else if-else if-…-else Let’s imagine a sausage! The sausage will represent all the values.

Multiple if-else if-else if-…-else Let’s imagine a sausage! The sausage will represent all the values.

Multiple if-else if-else if-…-else Let’s imagine a sausage! The sausage will represent all the values.

Review exercise

Fighting exercise Write a program with which you

can simulate one round of fight between you and a monster.

First we read in the attributes of each of you.

Then we play one round of the fight.

Peter Tikos

Fighting rulesAttributes:

Attack Points (AP) Defense Points (DP) Damage (D) Life Points (LP)

Fight (one round): Attacker is chosen randomly (coin toss) Attack Points + 2 Dice ? Enemy’s Defense Points

> : Attacker hits defender, so life points decreased by damage <= : Miss

Rules

Let’s fight! First let’s generate random numbers!

Let’s fight! First let’s generate random numbers! Then we are ready to fight

What’s next Choose one from many (switch) Repeat it! (the loops)

– While– Do-while– For

Controlling loops– Break– Continue

Multiple loops one inside the other

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End of video 1

Next video:

Control structures

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