/** 
*A short description : Class for simplified GUI Dialog  input of all variable types .....Getting GUI Dialog input 
*in java is a very tedious process ! This java
*class will help you to get all types of variables input from GUI Dialog with relatively ease. 
*All nine fundamental variable types are covered : byte, short,  int, long, float, double, char, String, and 
*boolean . It ignores appropiate input errors smartly. Copy this file to your project/java directory and 
*name it gui.java . Compile it using command : javac gui.java , and you are all done. In BlueJ 
*Save the source file, then use the "Import Class" function in BlueJ to import this class into your project. 
*Then it can be used like any other class. Please see the use of this class and input methods in 
*testguinput.java class example below, if you enjoy my effort, let me know through e-mail !!!
* 
* Original Authors : Bruce Quig + Michael Kolling, version: 1.0, Date: 04.03.1999 
* @author (Modified and enhanced by Shirshasin Ghosh Of Naihati, West Bengal, India... shirsha@rediffmail.com )
* @version ( 2.0 : 12.8.2004 : 11:30 A.M )
*/

import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JDialog;
import javax.swing.JButton;
import java.awt.event.*;

public class gui {

/*    instance variables */
   final String STRING_TITLE = "Enter a String";
   final String CHAR_TITLE = "Enter a charecter";
   final String INT_TITLE = "Enter an integer number";
   final String BOOLEAN_TITLE = "Select True or False / Yes or No";
   final String FLOAT_TITLE = "Enter a floating point number";
   final String TRUE = "True";
   final String FALSE = "False";
   final String EMPTY_STRING = "";
public    boolean checkecc = false ; 
public    int i , j ; 
public    String hold = "" ; 
public    char a ; 

/* 1. input a byte number */ 
public    byte getByte(String prompt)
{
Object[] commentArray = {prompt, EMPTY_STRING, EMPTY_STRING};
Object[] options = { "OK" };

String inputValue = "";
boolean validResponse = false;
byte response = 0;
while(!validResponse) 
{
final JOptionPane optionPane = new JOptionPane(commentArray,
JOptionPane.QUESTION_MESSAGE,
JOptionPane.OK_CANCEL_OPTION,
null,
options, 
options[0]);

optionPane.setWantsInput(true);
JDialog dialog = optionPane.createDialog(null, "Enter a Byte number");

dialog.pack();
dialog.show();

String result = (String)optionPane.getInputValue();
if ( checkecc ) result = convertwhole(result) ;
try 
{
response = Byte.parseByte(result);
validResponse = true; 
} 
catch(NumberFormatException exception) 
{
if(result.equals("uninitializedValue"))
result = ""; 
commentArray[1] = "Invalid byte: " + result;
commentArray[2] = "Enter a valid byte";
}
}
return response;
} /* End of getByte method */

/*2. input a short number */
public    short getShort(String prompt)
{
Object[] commentArray = {prompt, EMPTY_STRING, EMPTY_STRING};
Object[] options = { "OK" };

String inputValue = "";
boolean validResponse = false;
short response = 0;
while(!validResponse) 
{
final JOptionPane optionPane = new JOptionPane(commentArray,
JOptionPane.QUESTION_MESSAGE,
JOptionPane.OK_CANCEL_OPTION,
null,
options, 
options[0]);

optionPane.setWantsInput(true);
JDialog dialog = optionPane.createDialog(null, "Enter a short number");

dialog.pack();
dialog.show();

String result = (String)optionPane.getInputValue();
if ( checkecc ) result = convertwhole(result) ;
try 
{
response = Short.parseShort(result);
validResponse = true; 
} 
catch(NumberFormatException exception) 
{
if(result.equals("uninitializedValue"))
result = ""; 
commentArray[1] = "Invalid short: " + result;
commentArray[2] = "Enter a valid short";
}
}
return response;
} /* End of getShort method */

/* 3. Input a integer */
public    int getInt(String prompt)
{
Object[] commentArray = {prompt, EMPTY_STRING, EMPTY_STRING};
Object[] options = { "OK" };

String inputValue = "";
boolean validResponse = false;
int response = 0;
while(!validResponse) 
{
final JOptionPane optionPane = new JOptionPane(commentArray,
JOptionPane.QUESTION_MESSAGE,
JOptionPane.OK_CANCEL_OPTION,
null,
options, 
options[0]);

optionPane.setWantsInput(true);
JDialog dialog = optionPane.createDialog(null, INT_TITLE);

dialog.pack();
dialog.show();

String result = (String)optionPane.getInputValue();
if ( checkecc ) result = convertwhole(result) ;
try 
{
response = Integer.parseInt(result);
validResponse = true; 
} 
catch(NumberFormatException exception) 
{
if(result.equals("uninitializedValue"))
result = ""; 
commentArray[1] = "Invalid int: " + result;
commentArray[2] = "Enter a valid integer";
}
}
return response;
} /* End of getInt method */

/* 4. input a long number */
public    long getLong(String prompt)
{
Object[] commentArray = {prompt, EMPTY_STRING, EMPTY_STRING};
Object[] options = { "OK" };

String inputValue = "";
boolean validResponse = false;
long response = 0;
while(!validResponse) 
{
final JOptionPane optionPane = new JOptionPane(commentArray,
JOptionPane.QUESTION_MESSAGE,
JOptionPane.OK_CANCEL_OPTION,
null,
options, 
options[0]);

optionPane.setWantsInput(true);
JDialog dialog = optionPane.createDialog(null, "Enter a long number");

dialog.pack();
dialog.show();

String result = (String)optionPane.getInputValue();
if ( checkecc ) result = convertwhole(result) ;
try 
{
response = Long.parseLong(result);
validResponse = true; 
} 
catch(NumberFormatException exception) 
{
if(result.equals("uninitializedValue"))
result = ""; 
commentArray[1] = "Invalid long : " + result;
commentArray[2] = "Enter a valid long";
}
}
return response;
} /* End of getLong method */

/* 5. Input a Float */
public    float getFloat(String prompt)
{
Object[] options = { "OK" };
Object[] commentArray = {prompt, EMPTY_STRING, EMPTY_STRING};

String inputValue = "";
boolean validResponse = false;

float response = 0.0f;

while(!validResponse) 
{
final JOptionPane optionPane = new JOptionPane(commentArray,
JOptionPane.QUESTION_MESSAGE,
JOptionPane.OK_CANCEL_OPTION,
null,
options, 
options[0]);

optionPane.setWantsInput(true);
JDialog dialog = optionPane.createDialog(null, FLOAT_TITLE);

dialog.pack();
dialog.show();

String result = (String)optionPane.getInputValue();
if ( checkecc ) result = convertfrac(result) ;
try 
{
response = Float.valueOf(result).floatValue();
validResponse = true; 
} 
catch(NumberFormatException exception) 
{
commentArray[1] = "Invalid float: " + result;
commentArray[2] = "Enter a valid float";
inputValue = result;
}
}
return response;
} /* End of getFloat method */

/* 6. input a double */ 
public    double getDouble(String prompt)
{
Object[] commentArray = {prompt, EMPTY_STRING, EMPTY_STRING};
Object[] options = { "OK" };

String inputValue = "";
boolean validResponse = false;
double response = 0;
while(!validResponse) 
{
final JOptionPane optionPane = new JOptionPane(commentArray,
JOptionPane.QUESTION_MESSAGE,
JOptionPane.OK_CANCEL_OPTION,
null,
options, 
options[0]);

optionPane.setWantsInput(true);
JDialog dialog = optionPane.createDialog(null, "Enter a double precision number");

dialog.pack();
dialog.show();

String result = (String)optionPane.getInputValue();
if ( checkecc ) result = convertfrac(result) ;
try 
{
response = Double.parseDouble(result); 
validResponse = true; 
} 
catch(NumberFormatException exception) 
{
if(result.equals("uninitializedValue"))
result = ""; 
commentArray[1] = "Invalid double : " + result;
commentArray[2] = "Enter a valid double";
}
}
return response;
} /* End of getDouble method */

/* 7. Input a char */
public    char getChar(String prompt)
{
char response ='-';

String result = null;

Object[] commentArray = {prompt, EMPTY_STRING, EMPTY_STRING};
Object[] options = { "OK" };

String inputValue = "";
boolean validResponse = false;

while(!validResponse) 
{
final JOptionPane optionPane = new JOptionPane(commentArray,
JOptionPane.QUESTION_MESSAGE,
JOptionPane.OK_CANCEL_OPTION,
null,
options, 
options[0]);

optionPane.setWantsInput(true);
JDialog dialog = optionPane.createDialog(null, CHAR_TITLE);

dialog.pack();
dialog.show();

Object input = optionPane.getInputValue();
if(input != JOptionPane.UNINITIALIZED_VALUE) 
{
result = (String)input;
if(result != null && result.length() == 1) 
{
response = result.charAt(0);
validResponse = true;
}
else 
{ 
commentArray[1] = "Invalid entry : " + result;
commentArray[2] = "Enter a single character"; 
}
}
else 
{ 
commentArray[1] = "Invalid entry : " + result;
commentArray[2] = "Enter a single character"; 
}
}
return response;
} /* End of getChar method */

/* 8. Input a String */
public    String getString(String prompt)
{
Object[] commentArray = {prompt, EMPTY_STRING, EMPTY_STRING};
Object[] options = { "OK" };

String inputValue = "";
boolean validResponse = false;

String result = null;

while(!validResponse) 
{
final JOptionPane optionPane = new JOptionPane(commentArray,
JOptionPane.QUESTION_MESSAGE,
JOptionPane.OK_CANCEL_OPTION,
null,
options, 
options[0]);

optionPane.setWantsInput(true);
JDialog dialog = optionPane.createDialog(null, STRING_TITLE);

dialog.pack();
dialog.show();

Object response = optionPane.getInputValue();

if(response != JOptionPane.UNINITIALIZED_VALUE) 
{
result = (String)response;
validResponse = true;
} 
else 
{
commentArray[1] = "Invalid entry : " + result;
commentArray[2] = "Enter a valid String";
}
}
return result;
} /* End of getString method */

/* 9. Input a Boolean */
public    boolean getBoolean(String prompt, String trueText, String falseText)
{
Object[] commentArray = {prompt, EMPTY_STRING};
boolean validResponse = false;
int result = -1;

while(!validResponse)
{
Object[] options = {trueText, falseText};
result = JOptionPane.showOptionDialog(null,
commentArray,
BOOLEAN_TITLE,
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE,
null, //don't use a custom Icon
options, //the titles of buttons
TRUE ); //the title of the default button

// check true or false buttons pressed
if(result == 0 || result == 1)
validResponse = true;
else
commentArray[1] = "Incorrect selection : Choose true or false buttons";
}
return (result == 0);
} /* End of getBoolean mehod */

/* overloading getBoolean method */
public    boolean getBoolean(String prompt) 
{ 
return getBoolean(prompt, TRUE, FALSE); 
} /* end of overloaded getBoolean method */


/*** 10. Two ecc validate and triming/removing functions are giving below  ***/
public String convertfrac (String str1) {
hold = "0" ; a = ' '; str1 = str1.trim() ; i = str1.length() ; int count = 0 ; 
for ( j = 0 ; j < i ; j++ ) { 
a = str1.charAt(j) ; if ( a == '.' ) count++ ;
if ( ( Character.isDigit(a)  ||  ( a == '.') ) && ( count <= 1) ) hold = hold + a ; 
                            }  return hold ;
                                        }
                                        
public String convertwhole (String str1) {
str1 = str1.trim() ; i = str1.length() ; hold = "0" ; a = ' '; 
for ( j = 0 ; j < i ; j++ ) { 
a = str1.charAt(j) ;
if ( Character.isDigit(a) ) hold = hold + a ; 
else if ( a == '.' ) return hold ;
                            } return hold ;
                                        }
                                        
/* 12. A Handy method for testing prime numbers */
public    boolean isprime( long b ) 
{
long a, c; byte k = 1 ;
a = Math.round( Math.sqrt(b) ) ;
for ( c = 2; c <= a ; c++ ) { if ((b % c) == 0 ) { k = 0 ; break ; } }
if (k == 1) return true ; else return false ;
} /* End of isprime method */

/* 13A. A handy method for giving spaces on a line */
public    void space ( int n )
{ 
int i ;
for ( i = 1 ;i <= n ; i++) System.out.print(" ");
} /* End of space method */ 

/* 13B. Simple blank line showing method */
public    void showline( int n ) 
{ for ( i = 1 ; i <= n ; i++) System.out.print("\n") ; }

/* 14. Set the ecc code to true of false */
public    void ecc( boolean get ) 
{ checkecc = get ; }

/* 15. Simple message display method */
public    void show( String prompt ) 
{ JOptionPane.showMessageDialog(null, prompt) ; }

/* 16. show method overloaded for heading */ 
public    void show( String prompt, String heading ) 
{ JOptionPane.showMessageDialog(null, prompt, heading, JOptionPane.INFORMATION_MESSAGE) ; }

} /* End of gui class */