NetBeans 8 Basic Console Input Output [CIO]

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NetBeans 8 Basic Console Input Output [CIO]

STEPS

1) Start NetBeans.

2) Create a new project.

2-1) Select Java Application.

2-2) Type the name MyConsole1.

2-3) Project is created.

        

3) Edit Codes

3-1) Replace the line “// TODO …” with the following codes.

Scanner sc = new Scanner(System.in);     System.out.print("Please enter your weight: ");     int weight = sc.nextInt();     System.out.println("Weight = " + weight);

Press SHIFT-ALT-F to realign your codes.

3-2) Notice some syntax errors.

3-3) If you hover your mouse over the red underlined text, you will get some help message.

3-4) Choose “Add import for java.util.Scanner”

3-5) NetBeans add the import line.

3-6) Run.

3-6-1) You will see the prompt “Please enter your weight:”

3-6-2) Click an area just after the colon, type 60 and press ENTER key.

3-7) Run again but this time enter “sixty” instead of a number 60.

3-8) You will get an error message.

3-9) Replace the codes in Step 3-1.

Scanner sc = new Scanner(System.in);     System.out.print("Please enter your weight: ");     int weight;     // Accept input and test to see if it’s an integer     if (sc.hasNextInt()) {        // Success, it was an integer so get it        weight = sc.nextInt();        System.out.println("Weight = " + weight);     } else {         // Failure so retrieve the input as a String         String bad = sc.next();         // Inform the user what went wrong         System.out.println(bad + " cannot be converted to an integer");     }

3-10) Run.

3-11) Enter “sixty”.

3-12) Finally, replace the current codes with the following

Scanner sc = new Scanner(System.in);     System.out.println("Select an Account");     System.out.println("A: Savings");     System.out.println("B: Checking");     System.out.println("C: Exit");     System.out.print("Please choose A, B or C: ");     char letter;     if (sc.hasNext("[A-Ca-c]")) {         String choice = sc.next();         letter = choice.toUpperCase().charAt(0);         System.out.println("You chose: " + letter);     } else {         String choice = sc.next();         System.out.println(choice + " is not valid input");     }

3-13) Outcome:

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Source: http://netbeans.dzone.com/nb-class-console-input-regular-exp 
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