HOW TO I CHANGE THE SWITCH TO IF ELSE OR DO WHILE OR WHILE DO FOR THIS CODING

Home Answers Viewqa JSF-Questions HOW TO I CHANGE THE SWITCH TO IF ELSE OR DO WHILE OR WHILE DO FOR THIS CODING

badrul hisham

HOW TO I CHANGE THE SWITCH TO IF ELSE OR DO WHILE OR WHILE DO FOR THIS CODING
1 Answer(s) a year and 8 months ago
Posted in : Java Server Faces Questions

import java.util.LinkedList; import java.util.*; import java.io.*; import java.lang.*;

public class LinkedListv4 {

char question;
Scanner console = new Scanner(System.in);
LinkedList listA = new LinkedList();

public void Switchers(){

            System.out.println("| a. Append a specified elements to the list");
            System.out.println("| b. Add an element at specified index");
            System.out.println("| c. Add a new elements in front of the list");
            System.out.println("| d. Add new elements with a specified value into the list alternately");
            System.out.println("| e. Remove the first element in the list");
            System.out.println("| f. Find an element at a specified position in the list");
            System.out.println("| g. Replace the elements at a specified index");
            System.out.println("| h. Print the list");
            System.out.println("| i. Print the list from a specified index");
            System.out.println("| j. Print the list in reverse order");
            System.out.println("| k. Remove all elements in the list");
            System.out.println("| l. Check for empty list");
            System.out.println("| q. Quit");



            question = console.next().charAt(0);
            System.out.println();



            switch (question) {
              case 'a': AppendElement();

              case 'b': AddElementSpecific();

              case 'c': AddElementFront();

              case 'd': EditExistingList();

              case 'e': RemoveFirstElement();

              case 'f': ViewElements();

              case 'g': ReplaceElement();

              case 'h': PrintList();

              case 'i': PrintListSpecific();

              case 'j': PrintReverseOrder();

              case 'k': ClearAll();

              case 'l': CheckEmptyList();

              case 'q': Quit(); 

              case 'Q': Quit(); break;

              default: System.out.println("Invalid Input"); 
                        System.out.println();
                        Switchers(); break;
}

}

            //1 --- DONE
            public void AppendElement() {

                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Create/Store objects in an LinkedList container.                    |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();

                    System.out.println("Please set maximum elements required");
                    System.out.println();
                    int Max = console.nextInt();

                    for (int i = 0; i < Max; i++) {

                        System.out.println("Please insert number for element "+ i);
                        double element = console.nextDouble();
                        System.out.println("  - Storing Number(" + element + ")");
                        listA.add(new Double(element));
                    }

                        System.out.println();
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println("| Retrieve objects in an LinkedList container using an Iterator.      |");
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println();

                        Iterator Ite = listA.iterator();
                            while (Ite.hasNext()) {
                                System.out.println(Ite.next());
                            }

                            Switchers();

            }

            //2 --- DONE FIXED - ???
            public void AddElementSpecific() {



                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Create/Store objects in specified  LinkedList container.            |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();

                    System.out.println("Please insert specified index :");
                    int index = console.nextInt();

                        System.out.println("Please insert number for element  :");
                        double element = console.nextDouble();
                        System.out.println("  - Storing Number(" + element + ")");
                        listA.add(index,new Double(element));

                        System.out.println();
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println("| Retrieve objects in an LinkedList container using an Iterator.      |");
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println();

                        Iterator Ite = listA.iterator();
                            while (Ite.hasNext()) {
                                System.out.println(Ite.next());


                            }

                            Switchers();

                }

            //3 --- DONE
            public void AddElementFront() {

                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Create/Store objects in front of LinkedList container.              |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();

                        int i= 0;
                        System.out.println("System will store element to the first index, Insert new element please  :");
                        double element = console.nextDouble();
                        System.out.println("  - Storing Number(" + element + ")");
                        listA.add(0,new Double(element));


                        System.out.println();
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println("| Retrieve objects in an LinkedList container using an Iterator.      |");
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println();

                        Iterator Ite = listA.iterator();
                            while (Ite.hasNext()) {
                                System.out.println(Ite.next());


                            }

                            Switchers();
                }

            //4 --- DONE - ???
            public void EditExistingList() {

                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Add new elements with a specified value into the list alternately   |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();
                    System.out.println();
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Retrieve objects in an LinkedList container using an Iterator.      |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();
                    Iterator IteInitial = listA.iterator();
                            while (IteInitial.hasNext()) {
                                System.out.println(IteInitial.next());
                            }

                    System.out.println("Please choose desirable index to modify elements");
                    System.out.println();
                    int SpecIndex = console.nextInt();
                    listA.remove(SpecIndex);

                        System.out.println("Please insert new number for element "+ SpecIndex);
                        double element = console.nextDouble();
                        System.out.println("  - Storing Number(" + element + ")");
                        listA.add(SpecIndex,new Double(element));

                        System.out.println();
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println("| Retrieve objects in an LinkedList container using an Iterator.      |");
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println();

                        Iterator Ite = listA.iterator();
                            while (Ite.hasNext()) {
                                System.out.println(Ite.next());
                            }

                            Switchers();                        

                }

            //5 --- DONE
            public void RemoveFirstElement() {

                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("|      Remove fisrt element in the LinkedList container.              |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();

                    Object object = listA.removeFirst();
                    System.out.println(object + " has been removed from the first index of LinkedList");

                    System.out.println();
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Retrieve objects in an LinkedList container using an Iterator.      |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();

                    Iterator Ite = listA.iterator();
                    while (Ite.hasNext()) {
                    System.out.println(Ite.next());


                            }

                            Switchers();

                }

            //6 --- DONE
            public void ViewElements() {

                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Find an element at a specified position in the list                 |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();
                    System.out.println();
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Retrieve objects in an LinkedList container using an Iterator.      |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();

                    Iterator Ite = listA.iterator();
                    while (Ite.hasNext()) {
                    System.out.println(Ite.next());
                    }

                    System.out.println("Select any element in the list to review index position :");
                    double element = console.nextDouble();
                    System.out.println();

                    int NotNegOne = listA.indexOf(element);

                    if (NotNegOne != -1) {
                      System.out.println("element "+element+" is at index "+listA.indexOf(element));
                    } 

                    else {
                      System.out.println("LinkedList does not contain "+element);
                    }

                    Switchers();

                }


            //7 --- DONE
            public void ReplaceElement() {

                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Replace the elements at a specified index                           |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();
                    System.out.println();
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Retrieve objects in an LinkedList container using an Iterator.      |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();
                    Iterator IteInitial = listA.iterator();
                            while (IteInitial.hasNext()) {
                                System.out.println(IteInitial.next());
                            }

                    System.out.println();
                    System.out.println("Please choose desirable index to modify elements");
                    System.out.println();
                    int SpecIndex = console.nextInt();
                    listA.remove(SpecIndex);

                        System.out.println("Please insert new number for index "+ SpecIndex);
                        double element = console.nextDouble();
                        System.out.println("  - Storing Number(" + element + ")");
                        listA.add(SpecIndex,new Double(element));

                        System.out.println();
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println("| Retrieve objects in an LinkedList container using an Iterator.      |");
                        System.out.println("+---------------------------------------------------------------------+");
                        System.out.println();

                        Iterator Ite = listA.iterator();
                            while (Ite.hasNext()) {
                                System.out.println(Ite.next());
                            }

                    Switchers();

                }

            //8 --- DONE
            public void PrintList() {

                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("|      Print List in the LinkedList container.                    |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();

                    if (listA.isEmpty()){
                    System.out.println("Linked list is empty");
                    }
                    else{
                     System.out.println (listA);
                    }

                    Switchers();

                }

            //9 --- DONE
            public void PrintListSpecific() {

                                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("|      Print List from specified index in the LinkedList container.   |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();

                    try {

                    int indexSize = listA.size();
                    int realIndexSize = indexSize - 1;
                    System.out.println("Total Index in LinkedList (counting from O) "+realIndexSize);
                    System.out.println();
                    System.out.println();
                    System.out.println("Please choose desirable index to view its element");
                    System.out.println();
                    int SpecIndex = console.nextInt();
                    System.out.println();
                    System.out.println("The element is "+listA.get(SpecIndex)+" at index "+SpecIndex);

                    }

                    catch ( Exception e )  {
                        System.out.println();
                        System.out.println("LinkedList does not contain index requested");  
                    }


                    Switchers();

                }

            //10 --- DONE
            public void PrintReverseOrder() {

                    System.out.println();
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println("| Reverse the list in the LinkedList container.                       |");
                    System.out.println("+---------------------------------------------------------------------+");
                    System.out.println();

                    ListIterator itr = listA.listIterator();

                    System.out.println("Iterating through elements of Java LinkedList using ListIterator in forward direction...");
                    while(itr.hasNext())
                    {
                    System.out.println(itr.next());
                    }

                    System.out.println("Iterating through elements of Java LinkedList using ListIterator in reverse direction...");
                    while(itr.hasPrevious())
                    {
                    System.out.println(itr.previous());
                    }


            Switchers();

                }

            //11 --- DONE
            public void ClearAll() {

                System.out.println("+---------------------------------------------------------------------+");
                System.out.println("|      Clear entire LinkedList                                        |");
                System.out.println("+---------------------------------------------------------------------+");
                System.out.println();

                listA.clear();
                System.out.println("All element has been removed");
                System.out.println();
                System.out.println();

                if (listA.isEmpty()){
                    System.out.println("Linked list is empty");
                    }
                    else{
                     System.out.println (listA);
                    }

                Switchers();

                }

            //12 --- DONE
            public void CheckEmptyList() {

                if (listA.isEmpty()){
                    System.out.println();
                    System.out.println("Linked list is empty");
                    System.out.println();
                    }
                    else{
                     System.out.println (listA);
                    }

                Switchers();

                }

            //13 ---DONE
            public void Quit() {

                System.exit(0);
                }


public static void main (String args[]) {

    LinkedListv4 MYlinkList = new LinkedListv4();
    MYlinkList.Switchers();
}

}

View Answers

September 19, 2011 at 1:05 PM

Do modifications:

public void Switchers(){
              boolean exit=false;
              do{
            System.out.println("| a. Append a specified elements to the list");
            System.out.println("| b. Add an element at specified index");
            System.out.println("| c. Add a new elements in front of the list");
            System.out.println("| d. Add new elements with a specified value into the list alternately");
            System.out.println("| e. Remove the first element in the list");
            System.out.println("| f. Find an element at a specified position in the list");
            System.out.println("| g. Replace the elements at a specified index");
            System.out.println("| h. Print the list");
            System.out.println("| i. Print the list from a specified index");
            System.out.println("| j. Print the list in reverse order");
            System.out.println("| k. Remove all elements in the list");
            System.out.println("| l. Check for empty list");
            System.out.println("| q. Quit");


            System.out.print("Enter your choice: ");
            question = console.next().charAt(0);
            System.out.println();

            if(question=='a'){
                 AppendElement();
            }

            else if(question=='b'){
                 AddElementSpecific();
            }

            else if(question=='c'){
                 AddElementFront();
             }
            else if(question=='d'){
                 EditExistingList();
             }
            else if(question=='e'){
                 RemoveFirstElement();
             }
            else if(question=='f'){
                 ViewElements();
            }
            else if(question=='g'){
                 ReplaceElement();
            }
            else if(question=='h'){
                 PrintList();
            }
            else if(question=='i'){
                 PrintListSpecific();
            }  
            else if(question=='j'){
                 PrintReverseOrder();
            }
            else if(question=='k'){
                 ClearAll();
            }
            else if(question=='l'){
                 CheckEmptyList();
            }
            else if(question=='q'){
                 Quit();
                 exit=true;
            }
            else if(question=='Q'){
                 Quit();
                 exit=true;
            }

          }
               while(!exit);

}

HOW TO I CHANGE THE SWITCH TO IF ELSE OR DO WHILE OR WHILE DO FOR THIS CODING
HOW TO I CHANGE THE SWITCH TO IF ELSE OR DO WHILE OR WHILE DO.... Print the list"); System.out.println("| i. Print the list from...); System.out.println(); switch (question

Use if, if else,for,while,do wile ad switch in same Java Class
Use if, if else,for,while,do wile ad switch in same Java Class hi how to use if, if else,for,while,do wile ad switch in same class? very urgent... "); System.out.println("5. Exit"); boolean quit = false; do{ System.out.print("Please

While and do-while
While and do-while ... of nested classes i) Static classes ii) Inner classes ( Non-static... { ... } class InnerClass { ... } } i) Static Nested Classes

The while and do
While and do-while ...-while statement now. Here is the syntax: do { statement(s) } while (expression); Lets tweak an example of do-while loop

do-while loop
do-while loop how many times will the following loop get executed and what will be the final value of the variable I after execution the loop is over. int I = 5; do{ I + = 3; System.out.println(""+I); I=I+1; }while(I>=9

programes on do... while
programes on do... while write a program to print reverse...; for (int i = 0; i <= num; i++) { int r = num % 10...; i = 0; } return reversedNumber

PHP Do While Loop
Do-While Control Structure: Do-While loop is another type of loop which runs... within. We generally use Do-While loop when the iteration must run at least once despite of the validity of the variable. In Do-While loop we need

PHP Do While Loop
of the variable within the loop. PHP do while loop Example: <?php $i=34; do... of $i is not valid but do-while loop runs at least one time despite...Do-While Loop Function PHP: PHP Do-While loop method is another type of loop

While and do-while
While and do-while ... at do-while statement now. Here is the syntax: do { statement(s) } while (expression); Lets tweak an example of do-while loop

php do while syntax
php do while syntax How to create a do while loop in php. What is the syntax

How do I change the while loop in this code to the range with range list style display page for a resultSet() in jsp?
How do I change the while loop in this code to the range with range list style display page for a resultSet() in jsp? this is count record code...); while (rs.next()) { rows =rs.getInt(1); %> <

Java while coding - Java Beginners
Java while coding Java loop and function coding question? How can I... * 19; I'd to use a method (function) to do the computation I'd like... boolexit=true; do { BufferedReader br = new BufferedReader(new

while and do while
while and do while hello, What is the difference between a while statement and a do statement? hello, A while statement checks at the beginning of a loop to see whether the next loop iteration should occur. A do

how do i solve this problem?
how do i solve this problem? Define a class named Circle... the Circle object is data fields. A public method named changeColour(String) to change... objects. The first object must be created using the default constructor, while

how do i solve this question?
how do i solve this question? 1.Define a class named Circle... changeColour(String) to change the value of the Circle objectÃ¢â?¬â?¢s colour... be created using the default constructor, while the second object must be created

do-while Loop in Java
; while(condition); In this example you will see how to use the do-while loop... do-while Loop in Java ... and processes once at least. For that you have to use the do while loop in after

php do while example
php do while example Simple example of do while loop in PHP

php do while loop
php do while loop Difference between do while loop and simple loop in PHP

php do while false
php do while false Is there any difference between FALSE and false

php do while break
php do while break receiving a Fatal saying cannot break/continue.. please suggest. Thank U

while & do..while Loop
while & do..while Loop while loop The while loop iterate until provided... : Value of j 1Value of j 2Value of j 3 The do...while statement The do-while... : do { code to be executed; } while (condition

How do i do the coding for 'leaving a comment' in java
How do i do the coding for 'leaving a comment' in java i am designing a webpage.In my webpage i want to add the option of adding a comment by the readers of the page.how do i do

Do..While Loops
3.10.2. Do…While Loops The do...while statement always execute... the condition is true. Syntax do { code to be executed; } while (condition); e.g.... reaches to either 5 or less than 5. <?php $i=1; do { $i++; echo &ldquo

Class.forName will do while loading drivers
Class.forName will do while loading drivers What Class.forName will do while loading drivers

how do i apply the javascript validation functions to the iframe content?
how do i apply the javascript validation functions to the iframe content? ... in the frame then how do i call this startframe function into the frame so... change - don't use divLive while editing page) var divs = new

how to do dynamic ally placeholder using properties or some else - JSP-Servlet
how to do dynamic ally placeholder using properties or some else dear sir, how to use and declare a dynamic place holder in java? i have to send... And Regards HR while sending this mail i have to read a excel file in that specified

Java Break while example
be used for terminating other loops as well such as while, do while etc. . Break is a tool inside Java branching category. With the example below, how to terminate... Java Break while example

problem to do coding upload image in php
problem to do coding upload image in php can i get example coding how to upload image in php?i have try it but i dont no wheter it is correct or not because i can't save the image in folder and not connected to database mysql

PHP While Loop
are used namely for, while and do while. Apart from these there are some loops... tutorial we will study while, do while and for. So let's get started: While... loop. PHP While Loop Example: <?php $i=1

How to write a loop and a while loop
How to write a loop and a while loop How do I write a 1 loop and a 1 while loop for the example code: public boolean isTheFirstOneBigger (int num1, int num2) { if (num1 > num2) { return true

while loop to for loops
while loop to for loops I have to change this while loops... to know how to change it. int currentNum= num1; while(num1>num2... and there squares int i=1; while(i <= 10) { System.out.printf("%-13s

do while loop
do while loop In java a do while loop is a control flow statement that allows a certain code... with a condition associated with the while keyword. The code inside the do construct

How do i retain values in the drop down - Struts
How do i retain values in the drop down Hi, I have a jsp page... with the drop down. My problem is whenever i do this the values in the drop down gets reset while the others in the text boxes don't. How do i retain the values

how to do actionsheet in iphone?-RV
how to do actionsheet in iphone?-RV -(IBAction)buttonClicked...]]; //note: in most cases this would be just self.view, but because I was doing this in a tabBar Application, I use the superview. [asheet setFrame:CGRectMake

how i do url encoding process - JSP-Servlet
how i do url encoding process hai to all how i do the url encoding., when i passing data from one jsp page to another page,while passing some... post method., but here i want some of the url encodings plz help me., thanx

how do i use sql like query in my jsp page
how do i use sql like query in my jsp page how do i use sql like query in my jsp page Hi Friend, Try the following code: <%@ page... where name like 'a%'"); while(rs.next()){ out.println(rs.getString("name")+"<

I want to change my user name on your website ,how can i do this
I want to change my user name on your website ,how can i do this I want to change my user name on your website ,how can i do this You can create another account very easily with different username

how to do gui
is RM" + num1); } } } how to do gui for this coding..tq import...how to do gui import java.util.Scanner; import javax.swing.JFrame..." + firstKg ); }else { weight = weight - 1; num1 = weight * nextKg

Show spinner while loading image using JavaScript
of seconds before the chart changes. What i want do is it shows spinner while loading...Show spinner while loading image using JavaScript Hello sir I am... do this by using the power of setTimeout() method. This allows you set a timer

reached end of file while parsing and while expected
reached end of file while parsing and while expected import java.io....); do { if(input2=='c'||input2=='C') { degreesC=5*(temp-32)/9; System.out.println("Celcius:"+ degreesC); } else if(input2

how do you change the message box to a specific color
how do you change the message box to a specific color How do you change the message box color to a specific color? I can get the color to change with each input but i cant give it a specific color. Example I'm trying to change

I am new to programming and I am not sure what to do next? Any ideas?
I am new to programming and I am not sure what to do next? Any ideas? ...()==0) return false; for(int i=0;i<=str.length();i++) if (c==str.charAt(i)); return true; } // If userInputs

Switch databases
Switch databases How do you inter-change between relational databases without code changes

Java Control Statements
: the decision making statements (if-then, if-then-else and switch), looping statements (while, do-while and for) and branching statements (break, continue... if and if-else statements. To avoid this we can use Switch statements

how to make enable/disable textbox in while(rs.next)
/disable function,the data are updated correctly. Is my javascript wrong? How do i...how to make enable/disable textbox in while(rs.next) Hi, I'm trying to enable/disable the textbox in the while loop. It works but when i want

Ask Questions?

If you are facing any programming issue, such as compilation errors or not able to find the code you are looking for.

Ask your questions, our development team will try to give answers to your questions.

Tutorial Topics