Presentation is loading. Please wait.

Presentation is loading. Please wait.

© A+ Computer Science - www.apluscompsci.com. Visit us at www.apluscompsci.com Full Curriculum Solutions www.apluscompsci.com M/C Review Question Banks.

Published byDwight Harper Modified over 9 years ago

Similar presentations

Presentation on theme: "© A+ Computer Science - www.apluscompsci.com. Visit us at www.apluscompsci.com Full Curriculum Solutions www.apluscompsci.com M/C Review Question Banks."— Presentation transcript:

1 © A+ Computer Science - www.apluscompsci.com

2 Visit us at www.apluscompsci.com Full Curriculum Solutions www.apluscompsci.com M/C Review Question Banks Live Programming Problems Tons of great content! www.facebook.com/APlusComputerScience

3 © A+ Computer Science - www.apluscompsci.com

4 import java.util.Scanner; Try to be as specific as possible when using an import.

5 © A+ Computer Science - www.apluscompsci.com Scanner keyboard = new Scanner(System.in); reference variable object instantiation

6 © A+ Computer Science - www.apluscompsci.com

7 Scanner frequently used methods NameUse nextInt()returns the next int value nextDouble()returns the next double value nextFloat()returns the next float value nextLong()returns the next long value nextByte()returns the next byte value nextShort()returns the next short value next()returns the next one word String nextLine()returns the next multi word String import java.util.Scanner;

8 © A+ Computer Science - www.apluscompsci.com Scanner keyboard = new Scanner(System.in); out.print("Enter an integer :: "); int num = keyboard.nextInt();

9 © A+ Computer Science - www.apluscompsci.com out.print("Enter an integer :: "); int num = keyboard.nextInt(); out.println(num); OUTPUT Enter an integer :: 931 931 INPUT 931

10 © A+ Computer Science - www.apluscompsci.com int num = keyboard.nextInt(); reference variable method call

11 © A+ Computer Science - www.apluscompsci.com out.print("Enter an integer :: "); Prompts are used to tell the user what you want.

12 © A+ Computer Science - www.apluscompsci.com

13 Scanner keyboard = new Scanner(System.in); out.print("Enter a double :: "); double num = keyboard.nextDouble();

14 © A+ Computer Science - www.apluscompsci.com out.print("Enter a double :: "); double num = keyboard.nextDouble(); out.println(num); OUTPUT Enter a double :: 34.33 34.33 INPUT 34.33

15 © A+ Computer Science - www.apluscompsci.com double num = keyboard.nextDouble(); reference variable method call

16 © A+ Computer Science - www.apluscompsci.com

17 Visit us at www.apluscompsci.com Full Curriculum Solutions www.apluscompsci.com M/C Review Question Banks Live Programming Problems Tons of great content! www.facebook.com/APlusComputerScience

18 © A+ Computer Science - www.apluscompsci.com Scanner keyboard = new Scanner(System.in); out.print("Enter a string :: "); String word = keyboard.next();

19 © A+ Computer Science - www.apluscompsci.com out.print("Enter a string :: "); String word = keyboard.next(); out.println(word); OUTPUT Enter a string :: I love java. I INPUT I love java.

20 © A+ Computer Science - www.apluscompsci.com Scanner keyboard = new Scanner(System.in); out.print("Enter a sentence :: "); String sentence = keyboard.nextLine();

21 © A+ Computer Science - www.apluscompsci.com out.print("Enter a line :: "); String line = keyboard.nextLine(); out.println(line); OUTPUT Enter a line :: I love java. I love java. INPUT I love java.

22 © A+ Computer Science - www.apluscompsci.com

23 Visit us at www.apluscompsci.com Full Curriculum Solutions www.apluscompsci.com M/C Review Question Banks Live Programming Problems Tons of great content! www.facebook.com/APlusComputerScience

24 © A+ Computer Science - www.apluscompsci.com out.print("Enter an integer :: "); int num = keyboard.nextInt(); out.print("Enter a sentence :: "); String sentence = keyboard.nextLine(); out.println(num + " "+sentence); OUTPUT Enter an integer :: 34 Enter a sentence :: 34 INPUT 34 picks up \n nextLine() picks up whitespace.

25 © A+ Computer Science - www.apluscompsci.com out.print("Enter an integer :: "); int num = keyboard.nextInt(); keyboard.nextLine(); //pick up whitespace out.print("Enter a sentence :: "); String sentence = keyboard.nextLine(); out.println(num + " "+sentence); OUTPUT Enter an integer :: 34 Enter a sentence :: picks up \n 34 picks up \n INPUT 34 picks up \n nextLine() picks up whitespace.

26 © A+ Computer Science - www.apluscompsci.com

27 Scanner keyboard = new Scanner(System.in); out.println(keyboard.nextInt()); OUTPUT 1 2 3 INPUT 1 2 3 4 5

28 © A+ Computer Science - www.apluscompsci.com

29 BufferedReader keyboard = new BufferedReader( new InputStreamReader( System.in ) ); System.out.print("Enter a word :: "); String s = keyboard.readLine(); System.out.println(s + '\n' );

30 © A+ Computer Science - www.apluscompsci.com readLine() reads in all data as text / string data. The text you read in must be converted over to the appropriate type before it can be stored. System.out.print("Enter an integer :: "); one = Integer.parseInt(keyboard.readLine()); System.out.print("Enter a double :: "); two = Double.parseDouble(keyboard.readLine());

31 © A+ Computer Science - www.apluscompsci.com

32

33 //GUI INPUT BOX input= JOptionPane.showInputDialog("Enter an integer :: "); one = Integer.parseInt(input); //GUI OUTPUT BOX JOptionPane.showMessageDialog(null, "Integer value :: " + one);

34 © A+ Computer Science - www.apluscompsci.com

35 Visit us at www.apluscompsci.com Full Curriculum Solutions www.apluscompsci.com M/C Review Question Banks Live Programming Problems Tons of great content! www.facebook.com/APlusComputerScience

Download ppt "© A+ Computer Science - www.apluscompsci.com. Visit us at www.apluscompsci.com Full Curriculum Solutions www.apluscompsci.com M/C Review Question Banks."

Similar presentations

Scanner Pepper With credits to Dr. Siegfried. The Scanner Class Most programs will need some form of input. At the beginning, all of our input will come.

Scanner Pepper With credits to Dr. Siegfried. The Scanner Class Most programs will need some form of input. At the beginning, all of our input will come.
Chapter 2: Java Fundamentals Input and Output statements.

Chapter 2: Java Fundamentals Input and Output statements.
IC211 Lecture 8 I/O: Command Line And JOptionPane.

IC211 Lecture 8 I/O: Command Line And JOptionPane.
© 2006 Pearson Addison-Wesley. All rights reserved2-1 Console Input Using the Scanner Class Starting with version 5.0, Java includes a class for doing.

© 2006 Pearson Addison-Wesley. All rights reserved2-1 Console Input Using the Scanner Class Starting with version 5.0, Java includes a class for doing.
COMPSCI 125 Spring 2005 ©TheMcGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 3: IO *Standard Output *Formatting Decimal.

COMPSCI 125 Spring 2005 ©TheMcGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 3: IO *Standard Output *Formatting Decimal.
LAB 10.

LAB 10.
1 Chapter 2 JAVA FUNDAMENTALS CONT’D. 2 PRIMITIVE DATA TYPES Computer programs operate on data values. Values in Java are classified according to their.

1 Chapter 2 JAVA FUNDAMENTALS CONT’D. 2 PRIMITIVE DATA TYPES Computer programs operate on data values. Values in Java are classified according to their.
Computer Programming Lab(5).

Computer Programming Lab(5).
Chapter 2 Section 2.2 Console Input Using The Scanner CLASS Slides prepared by Rose Williams, Binghamton University Kenrick Mock, University of Alaska.

Chapter 2 Section 2.2 Console Input Using The Scanner CLASS Slides prepared by Rose Williams, Binghamton University Kenrick Mock, University of Alaska.
CS 240 – Computer Programming I Lab Kalpa Gunaratna –

CS 240 – Computer Programming I Lab Kalpa Gunaratna –
Warm-Up: Monday, March 3 List all devices you can think of that can be used to input information into the computer.

Warm-Up: Monday, March 3 List all devices you can think of that can be used to input information into the computer.
Starting Out with Java: From Control Structures through Objects

Starting Out with Java: From Control Structures through Objects
Console Input. So far… All the inputs for our programs have been hard-coded in the main method or inputted using the dialog boxes of BlueJ It’s time to.

Console Input. So far… All the inputs for our programs have been hard-coded in the main method or inputted using the dialog boxes of BlueJ It’s time to.
Chapter 2 Console Input and Output Slides prepared by Rose Williams, Binghamton University Copyright © 2008 Pearson Addison-Wesley. All rights reserved.

Chapter 2 Console Input and Output Slides prepared by Rose Williams, Binghamton University Copyright © 2008 Pearson Addison-Wesley. All rights reserved.
Console Input & Output CSS 161: Fundamentals of Computing Joe McCarthy 1.

Console Input & Output CSS 161: Fundamentals of Computing Joe McCarthy 1.
Sahar Mosleh California State University San MarcosPage 1 System.out.println for console output System.out is an object that is part of the Java language.

Sahar Mosleh California State University San MarcosPage 1 System.out.println for console output System.out is an object that is part of the Java language.
Slides prepared by Rose Williams, Binghamton University Chapter 2 Console Input and Output.

Slides prepared by Rose Williams, Binghamton University Chapter 2 Console Input and Output.
Math class services (functions) Primitive vs reference data types Scanner class Math class services (functions) Primitive vs reference data types Scanner.

Math class services (functions) Primitive vs reference data types Scanner class Math class services (functions) Primitive vs reference data types Scanner.
Program Flow Program Flow follows the exact sequence of listed program statements, unless directed otherwise by a Java control structure.

Program Flow Program Flow follows the exact sequence of listed program statements, unless directed otherwise by a Java control structure.
Input/Output in Java. Output To output to the command line, we use either System.out.print () or System.out.println() or System.out.printf() Examples.

Input/Output in Java. Output To output to the command line, we use either System.out.print () or System.out.println() or System.out.printf() Examples.

Similar presentations

Ads by Google