Please help with the switch statement for rock paper scissor game using JOptionPane.

[Izaks1981]

Please help me out I am the biginner in java.I I suppose to write a program that plays the popular rock-paper game.The program should randomly generate the random number 0,1 or 2 representing the rock, paper or scissor. The program should randomly ask the user to enter number 0,1 or 0 and display the message indicating whether the user or the computer wins or draws.

NOTE: A scissor can cut a paper, a rock can crush a scissor and the paper can wrap a rock.


I am require to use math.random() medhod. To get random number between 0 and 2. I am required to use the following code:
(int)(Math.random() *)


Note: Math.radom return a double value between 0 and 1.

Finally JOptionPane is required for input and out.

Here is what i have sor far but I am getting few bugs. Please help I would reallly appreciate.



import javax.swing.JOptionPane; // Need JOptionPane class
import java.util.Random; // Need Random class
public class RockPaperScissorGameJOptionPane{
public static void main(String [] args){


// Please decleare the variables
String inputRock;
String inputScissor;
String inputNumber;
String inputPaper;
int number;
int paper;
int scissor;
int random;
int randomNumber;
int rock;

rock = 0;
paper = 1;
scissor = 2;


// Please prompt the user to enter the number 0, 1, and 2.
JOptionPane.showInputDialog(" Please ask the user to enter number 0,1 2 or enter 4 to exit ");
number = Integer.parseInt(inputNumber);

randomNumber = (int)(Math.random() *3);


switch(number){
case 1:
if(randomNumber == 2){
JOptionPane.showMessageDialog(null, " The computer wins.");
}
else if (randomNumber ==0){
JOptionPane.showMessageDialog(null, " The game is a draw.");
}
else if (randomNumber == 1){
JOptionPane.showMessageDialog(null,"The user is wins.");
}
break;

case 2:
if (randomNumber ==0){
JOptionPane.showMessageDialog(null,"The computer wins.");
}
else if(randomNumber ==1){
JOptionPane.showMessageDialog(null,"The game is draw.");
}
else if(randomNumber == 2){
JOptionPane.showMessageDialog(null,"The user wins.");
}
break;

case 3:
if (randomNumber == 1){
JOptionPane.showMessageDialog(null, " The computer wins.");
}
else if (randomNumber == 2){
JOptionPane.showMessageDialog(null, " The game is a draw.");
}
else if (randomNumber == 0){
JOptionPane.showMessageDialog(null, " The user wins.");
}
break;

case4:
System.exit(0);
}
}
}

[Norm]

t I am getting few bugs.

If you are getting error messages, copy the full text of the error message and paste it here.

Please edit your post and wrap your code with
[code=java]
<YOUR CODE HERE>
[/code]
to get highlighting and preserve formatting.

[Izaks1981]

C:\Users\lyared.METROSTATE\Desktop\RockPaperScisso rGameJOptionPane.java:31: error: variable inputNumber might not have been initialized
number = Integer.parseInt(inputNumber);
^
C:\Users\lyared.METROSTATE\Desktop\RockPaperScisso rGameJOptionPane.java:73: error: unreachable statement
case4:
^
2 errors

Tool completed with exit code 1

--- Update ---

Every time I am running it I am getting these errors

[Norm]

variable inputNumber might not have been initialized

The compiler can not find where inputNumber has been given a value before it is used.
Where does the code assign it a value?

I can't tell about the other error because the code is not properly formatted.

Please edit your post and wrap your code with
[code=java]
<YOUR CODE HERE>
[/code]
to get highlighting and preserve formatting.

[Izaks1981]

I have never done formating before could please explain to me how to do it and i will post my whole code in a minute thanks alot.

--- Update ---

I am currently using textpad

[Norm]

Look at some of the code posted on other threads. Statements nested within {} should be indented 3-4 spaces.
see this:
Code Conventions for the Java Programming Language: Contents

[Izaks1981]

// Edwin Lyaruu
// Programming Exercise 3.17
// February 25,2013
// This program plays the popular rock-paper-scissor game
 
import javax.swing.JOptionPane;   // Need JOptionPane class
import java.util.Random;         // Need  Random class
public class RockPaperScissorGameJOptionPane{
public static void main(String []  args){
 
 
// Please decleare the variables
   String inputRock;
   String inputScissor;
   String inputNumber;
   String inputPaper;
   int number;
   int paper;
   int scissor;
   int random;
   int randomNumber;
   int rock;
 
   rock = 0;
   paper = 1;
   scissor = 2;
 
 
// Please prompt the user to enter the number 0, 1, and 2.
   JOptionPane.showInputDialog(" Please ask the user to enter number 0,1 2 or enter 4 to exit ");
   number = Integer.parseInt(inputNumber);
 
 randomNumber = (int)(Math.random() *3);
 
 
 switch(number){
      case  1:
           if(randomNumber == 2){
           JOptionPane.showMessageDialog(null, " The computer wins.");
           }
           else if (randomNumber ==0){
           JOptionPane.showMessageDialog(null, " The game is a draw.");
           }
           else if (randomNumber == 1){
           JOptionPane.showMessageDialog(null,"The user is wins.");
           }
           break;
 
      case 2:
            if (randomNumber ==0){
            JOptionPane.showMessageDialog(null,"The computer wins.");
            }
            else if(randomNumber ==1){
            JOptionPane.showMessageDialog(null,"The game is draw.");
            }
            else if(randomNumber == 2){
            JOptionPane.showMessageDialog(null,"The user wins.");
            }
            break;
 
      case 3:
            if (randomNumber == 1){
            JOptionPane.showMessageDialog(null, " The computer wins.");
            }
            else if (randomNumber == 2){
            JOptionPane.showMessageDialog(null, " The game is a draw.");
            }
            else if (randomNumber == 0){
            JOptionPane.showMessageDialog(null, " The user wins.");
            }
            break;

--- Update ---

// Edwin Lyaruu
// Programming Exercise 3.17
// February 25,2013
// This program plays the popular rock-paper-scissor game
 
import javax.swing.JOptionPane;   // Need JOptionPane class
import java.util.Random;         // Need  Random class
public class RockPaperScissorGameJOptionPane{
public static void main(String []  args){
 
 
// Please decleare the variables
   String inputRock;
   String inputScissor;
   String inputNumber;
   String inputPaper;
   int number;
   int paper;
   int scissor;
   int random;
   int randomNumber;
   int rock;
 
   rock = 0;
   paper = 1;
   scissor = 2;
 
 
// Please prompt the user to enter the number 0, 1, and 2.
   JOptionPane.showInputDialog(" Please ask the user to enter number 0,1 2 or enter 4 to exit ");
   number = Integer.parseInt(inputNumber);
 
 randomNumber = (int)(Math.random() *3);
 
 
 switch(number){
      case  1:
           if(randomNumber == 2){
           JOptionPane.showMessageDialog(null, " The computer wins.");
           }
           else if (randomNumber ==0){
           JOptionPane.showMessageDialog(null, " The game is a draw.");
           }
           else if (randomNumber == 1){
           JOptionPane.showMessageDialog(null,"The user is wins.");
           }
           break;
 
      case 2:
            if (randomNumber ==0){
            JOptionPane.showMessageDialog(null,"The computer wins.");
            }
            else if(randomNumber ==1){
            JOptionPane.showMessageDialog(null,"The game is draw.");
            }
            else if(randomNumber == 2){
            JOptionPane.showMessageDialog(null,"The user wins.");
            }
            break;
 
      case 3:
            if (randomNumber == 1){
            JOptionPane.showMessageDialog(null, " The computer wins.");
            }
            else if (randomNumber == 2){
            JOptionPane.showMessageDialog(null, " The game is a draw.");
            }
            else if (randomNumber == 0){
            JOptionPane.showMessageDialog(null, " The user wins.");
            }
            break;

[Norm]

Take another look at how to spell the code tags. Most of the code tags you used needed fixing.

Here is how wrap your code with
[code=java]
<YOUR CODE HERE>
[/code]
to get highlighting and preserve formatting.

[Izaks1981]

//gram plays the popular rock-paper-scissor game

import javax.swing.JOptionPane; // Need JOptionPane class
import java.util.Random; // Need Random class
public class RockPaperScissorGameJOptionPane{
public static void main(String [] args){

randomNumber = (int)(Math.random() *3);

// Please decleare the variables
String inputRock;
String inputScissor;
String inputNumber;
String inputPaper;
int number;
int paper;
int scissor;
int random;
int randomNumber;
int rock;



rock = 0;
paper = 1;
scissor = 2;


// Please prompt the user to enter the number 0, 1, and 2.
JOptionPane.showInputDialog(" Please ask the user to enter number 0,1 2 or enter 4 to exit ");
number = Integer.parseInt(inputNumber);


switch(number){
case 1:
if(randomNumber == 2){
JOptionPane.showMessageDialog(null, " The computer wins.");
}
else if (randomNumber ==0){
JOptionPane.showMessageDialog(null, " The game is a draw.");
}
else if (randomNumber == 1){
JOptionPane.showMessageDialog(null,"The user is wins.");
}
break;

case 2:
if (randomNumber ==0){
JOptionPane.showMessageDialog(null,"The computer wins.");
}
else if(randomNumber ==1){
JOptionPane.showMessageDialog(null,"The game is draw.");
}
else if(randomNumber == 2){
JOptionPane.showMessageDialog(null,"The user wins.");
}
break;

case 3:
if (randomNumber == 1){
JOptionPane.showMessageDialog(null, " The computer wins.");
}
else if (randomNumber == 2){
JOptionPane.showMessageDialog(null, " The game is a draw.");
}
else if (randomNumber == 0){
JOptionPane.showMessageDialog(null, " The user wins.");
}
break;

case4:
System.exit(0);
}
}
}

[Norm]

Please edit your post and wrap your code with
[code=java]
<YOUR CODE HERE>
[/code]
to get highlighting and preserve formatting.