Curriculum

Java Basic

Java Home

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Java Introduction

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Java Get Started

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Java Syntax

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Java Output / Print

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Java Comments

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Java Variables

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Java Data Types

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Java Type Casting

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Java Operators

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Java Strings

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Java Math

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Java Booleans

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Java If ... Else

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Java Switch

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Java While Loop

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Java For Loop

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Java Break / Continue

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Java Arrays

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Java Methods

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Java Classes

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Java file Handling

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Java How To

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Java Reference

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Java String Methods

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Java Math Methods

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Java Output Methods

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Java Arrays Methods

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Java ArrayList Methods

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Java LinkedList Methods

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Java HashMap Methods

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Java Errors and Exception

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Text lesson

Real-Life Examples

This example illustrates how you can utilize if..else to “unlock a door” when the user inputs the correct code.

Example

int doorCode = 1337;

if (doorCode == 1337) {
   System.out.println("Correct code. The door is now open.");
} else {
 System.out.println("Wrong code. The door remains closed.");
}

This example demonstrates how if..else can be used to determine whether a number is positive or negative.

Example

int myNum = 10; // Is this a positive or negative number?

if (myNum > 0) {

   System.out.println("The value is a

positive number.");

} else if (myNum < 0) {

  System.out.println("The value is a negative number.");

} else {

   System.out.println("The value is

0.");

}

Determine if an individual is of legal voting age.

Example

int myAge = 25;

int votingAge = 18;

if (myAge >= votingAge) {

System.out.println(“Old enough to vote!”);

} else {

System.out.println(“Not old enough to vote.”);

}

Determine whether a number is even or odd.

Example

int myNum = 5;

if (myNum % 2 == 0) {

  System.out.println(myNum + " is even");

} else {

  System.out.println(myNum + " is odd");

}