Page 254 - PowerPoint Presentation

CAVITE STATE UNIVERSITY
TRECE MARTIRES CITY CAMPUS
Department of Information Technology DCIT 111 - Advanced Programming

Getting Input from the Keyboard using Scanner Class, BufferedReader and
InputStreamReader Class, and JOptopionPane Class.

Java Scanner
Java Scanner comes under the java.util package. Java has various ways to read input
from the keyboard, the java.util.Scanner is one of them.

//EXAMPLE OF java.util.Scanner PACKAGE

import java.util.Scanner; //import the java.uilt package

public class Operation{
public static void main(String[] args){

Scanner sc = new Scanner(System.in); // declaring the “sc” as the new scanner
// sc is just like a variable name. it can be change.
// (System.in) is a standard input source for getting input from
console or terminal. It’s a global access object.

int num1, num2, sum; difference, product, quotient, modulo;

System.out.println(“Enter the First Number: “);
num1 = sc.nextInt(); // here ‘sc’ is applied. Because ‘sc’ is declared as the new scanner
System.out.println(“Enter the Second Number: “);
num2 = sc.nextInt();

sum = num1+num2;
difference = num1-num2;
product = num1*num2;

quotient = num1/num2;
modulo = num1%num2;

System.out.println(“Sum: “+sum); // calling the sum variable using (+) sign then the
variable name
System.out.println(“Difference: “+difference); // calling the difference variable. ‘’
System.out.println(“Product: “+product); // calling the product variable. ‘’
System.out.println(“Quotient: “+quotient); // calling the quotient variable. ‘’
System.out.println(“Modulo: “+modulo); // calling the modulo variable. ‘’
}
}

NOTE:
// example: set the scanner_name as ‘sc’.

string name = sc.next() or sc.nextLine(); - to read string data type.
int num = sc.nextInt(); - to read integer data type
char a = sc.next().charAt(0); - to read a single character.
float f = sc.nextFloat(); - for float data type.
double d = sc.nextDouble(); - for double data type.

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