Solved

textfield for integer or string

Posted on 2004-10-07
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1,084 Views
Last Modified: 2008-03-03
Hi experts,

I need code for the following:
I have a textfield and two buttons. One button should be expect an integer from the text field (between 1-99) and when pressed it changes an integer variable.
the other button should expect a String and then change the "name" variable

thanks


also if anyone can help me with this question I accidently forgot to place it in the java topic area:
http://www.experts-exchange.com/Programming/Q_21154053.html

thanks everyone
0
Comment
Question by:Samooramad
[X]
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10 Comments
 
LVL 37

Accepted Solution

by:
zzynx earned 300 total points
ID: 12246436
By heart:

button1.addActionListener( new ActionListener() {
   public void actionPerformed(ActionEvent evt) {
       integerVariable = Integer.parse(textField.getText());
   }
});

button2.addActionListener( new ActionListener() {
   public void actionPerformed(ActionEvent evt) {
       name = textField.getText();
   }
});
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12246447
Sorry:

button1.addActionListener( new ActionListener() {
   public void actionPerformed(ActionEvent evt) {
       try {
          integerVariable = (Integer.valueOf(textField.getText())).intValue();
       } catch (NuberFormatException ex) { }
   }
});
0
 
LVL 37

Assisted Solution

by:zzynx
zzynx earned 300 total points
ID: 12246514
>> between 1-99
Of course you can check for that...

button1.addActionListener( new ActionListener() {
   public void actionPerformed(ActionEvent evt) {
       try {
          int tmp = (Integer.valueOf(textField.getText())).intValue();
          if (tmp>0 && tmp<100)
              integerVariable = tmp;
          else
              // You say it ;°)
       } catch (NuberFormatException ex) { }
   }
});
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LVL 5

Assisted Solution

by:Naeemg
Naeemg earned 100 total points
ID: 12246685
Try this code:


  void jButton4_actionPerformed(ActionEvent e)
  {
    int thisVal = Integer.parseInt(jTextField1.getText());
    int myValu = 0;
   
    if( thisVal >= 1 || thisVal <= 99)
    {
      myValu = thisVal;
    }
  }

  void jButton5_actionPerformed(ActionEvent e)
  {
    boolean isName = false;
    String name = "";
   
    //-- check whether this string contains A-Z, a-z and white space and dot.
    for(int i = 0; i < jTextField1.getText().length(); i++)
    {
      System.out.println("(int)jTextField1.getText().charAt(i) = " +
                       (int)jTextField1.getText().charAt(i));
     
   
      //** count number of Dots
       if(((int)jTextField1.getText().charAt(i) >= 65 && (int)jTextField1.getText().charAt(i) <= 90 ) //** A-Z
          ||((int)jTextField1.getText().charAt(i) >= 97 && (int)jTextField1.getText().charAt(i) <= 122 ) //** a-z
          ||((int)jTextField1.getText().charAt(i) == 46) //** equal to dot.
          ||((int)jTextField1.getText().charAt(i) == 32)) //** equal to white space
       {
         isName = true;
       }
       else
       {
           isName = false;
       }
    }

    if(isName)
      name = jTextField1.getText();
  }



bye.
Naeem Shehzad Ghuman
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12246770
Allow me to correct:

1)
  void jButton4_actionPerformed(ActionEvent e)
  {
     try {                                                  // <<<<<<<< try/catch needed
         int thisVal = Integer.parseInt(jTextField1.getText());
         if( thisVal >= 1 && thisVal <= 99)    // <<<<<<  && instead of ||
            myValu = thisVal;
     } catch (NumberFormatException ex) {
     }
  }

  Remark: I don't see the added value compared with my previous comment


2)
If you want to check if the string only contains A-Z, a-z, spaces and dots, you can better do this:

void jButton5_actionPerformed(ActionEvent e) {

    if ( jTextField1.getText().matches("([A-Za-z \\.])+?") )
      name = jTextField1.getText();
}

That's the power of regular expressions!
0
 
LVL 5

Expert Comment

by:Naeemg
ID: 12246819
Thanks zzynx  for correcting my mistakes.
0
 

Author Comment

by:Samooramad
ID: 12250219
thanks both of you. I'm working on it.. will get back to you
0
 

Author Comment

by:Samooramad
ID: 12250916
excelent help as always zzynx :)
thanks Naeemg for your help also.. I forgot I need to check for letters and spaces :)
0
 

Author Comment

by:Samooramad
ID: 12250946
hey if you guys have a little time please help with the question I mentioned above.. Its driving me nutts :)
0
 
LVL 37

Expert Comment

by:zzynx
ID: 12251725
thanks
0

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