1. Unit 1: Intro
Lesson 3: Input

2. Methods Input
Input methods are statements which give the user an interface through which to modify variables within a program
Input methods must be imported
Input method 1: Scanner
Input method 2: JOptionPane.showInputDialog(“ “);

3. Scanner
Simple
Input can be saved directly to any type of variable (int, float, double, etc.)
Can only be used in an IDE or the Command Line

4. JOptionPane.showInputDialog(“ “);
Slightly more complicated
Works outside of the IDE or Command Line
User – friendly interface
Combines an Output dialog with an Input field (input box)
Input can only be saved as Strings and must be converted (parsed) to a separate variable to be used as any other data type

5. Scanner Usage Import statement
Variable to store Input of desired data type
Variable to create the Scanner object in memory
Statement to assign Input to the storage variable
Import java.util.Scanner;
int myVariable;
Scanner myKeyboard = new Scanner(System.in);
myVariable = scanner.nextInt();

6. variable = scanner.nextDatatype();
int myVariable;
myVariable = scanner.nextInt(); int .nextInt();
float myVariable;
myVariable = scanner.nextFloat(); float .nextFloat();
String myVariable;
myVariable = scanner.nextLine(); String .nextLine();
Boolean myVariable;
myVariable = scanner.nextBoolean (); Boolean .nextBoolean();

7. JOptionPane Input Usage
Import statement
String variable to store Input
(optional) Variable of desired data type (for after parsing)
Statement to assign Input to the storage variable
(optional) Statement to parse (convert) Input to desired data type
Import javax.swing.JOptionPane;
String myVariable;
float myParsedVar; (Optional)
JOptionPane.showInputDialog(“Please input some data”);
myVariable = Float.parseFloat(myParsedVar); (Optional)