1. Scanner Class
Prof Crudele
09/02/07

2. // reading input from keyboard
import java.util.Scanner;
public class KeyBoardInput{
public static void main(String[] args){
Scanner scan = new Scanner(System.in);
System.out.println(“Enter a name: “);
String name = scan.next();
System.out.println(“Name: “ + name); }
// to read numbers from the keyboard
// int n = scan.nextInt();
// double x = scan.nextDouble();

3. // Given the price and sales tax of 7.5%,
// compute the total price
import java.util.Scanner;
public class SalesTax {
public static void main(String[] args){
Scanner scan = new Scanner(System.in);
System.out.println("Enter a price: ");
double price = scan.nextDouble();
double rate = 0.075;
double salesTax = price * rate;
double totalPrice = price + salesTax;
System.out.println("Total: $" + totalPrice); }

4. Reading Input Files in Java
import java.io.*;
import java.util.Scanner;
The java.util.Scanner class provides the best tools for reading
input files. It requires Java 2 Standard Edition 5.0 to be installed.
A Scanner can be created from a File object.
To create a File object, pass it the name of the file you want to open.
For example:
File infile = new File("block.txt");
To create a Scanner, pass it a File object:
Scanner scan = new Scanner(infile);

5. if( scan.hasNext() ) {
// ok to read the data... }
To read the next integer from the input stream, call nextInt():
int n = scan.nextInt();
To read the next double from the input stream, call nextDouble():
double x = scan.nextDouble();
To read the next String from the input stream, call next().
It stops reading when it hits a space, tab, or newline:
String temp = scan.next();
To read an entire line of text from an input stream, call nextLine():
String oneLine = scan.nextLine();

6. import java.util.Scanner;
import java.io.File;
import java.io.IOException;
public class ReadingFiles {
/**
* Prof Crudele 09/26/11
* How to read from files */
public static void main(String[] args)throws IOException {
File infile = new File("DATA.IN");
Scanner scan = new Scanner(infile);
while (scan.hasNext())
String line = scan.nextLine();
System.out.println(line); }

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non pretium nibh dignissim sed. Integer elementum, augue eu venenatis vestibulum, enim lacus pretium urna, vel dignissim est dolor ac
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