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Thread: if and else

  1. #1
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    Default if and else

    although there is no errors in my code, its not working

    PHP Code:
    if (jRadioButton1.isSelected())
          { 
              
    jLabel2.setText("right");
              
    jLabel2.setText(null);
          
    buttonGroup1.clearSelection();
             
    jLabel1.setText("how old am I");

    jRadioButton1.setText("15");
    jRadioButton2.setText("16");
    jRadioButton3.setText("17");
    jRadioButton4.setText("18");
         
          }
          else 
    jLabel2.setText("wrong"); 
    if the answer is right theradio buttons should be cleared, but its not working

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: if and else

    its not working
    What is not working?
    Add some println() statements to both the if and the else parts and see which is being executed.

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    javapenguin (June 3rd, 2010)

  4. #3
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    Lightbulb Re: if and else

    Quote Originally Posted by AbdulAziz Bader View Post
    although there is no errors in my code, its not working

    PHP Code:
    if (jRadioButton1.isSelected())
          { 
              
    jLabel2.setText("right");
              
    jLabel2.setText(null);
          
    buttonGroup1.clearSelection();
             
    jLabel1.setText("how old am I");

    jRadioButton1.setText("15");
    jRadioButton2.setText("16");
    jRadioButton3.setText("17");
    jRadioButton4.setText("18");
         
          }
          else 
    jLabel2.setText("wrong"); 
    if the answer is right theradio buttons should be cleared, but its not working
    I'm not very good at RadioButtons as I haven't really used them, but would this help:

    if(JRadioButton1.isSelected() == true)

    Also, why are you setting the text of JLabel to both "right" and null?

    That will just set it to null.

    Try this:
    if (jRadioButton1.isSelected())  == true)
          { 
            //   jLabel2.setText("right"); // 
              jLabel2.setText(null);
          buttonGroup1.clearSelection();
     
    jLabel1.setText("how old am I");
     
    jRadioButton1.setText("15");
    jRadioButton2.setText("16");
    jRadioButton3.setText("17");
    jRadioButton4.setText("18");
     
          }
          else jLabel2.setText("wrong");
     
    or this, depending on which one you're looking for.
     
    if (jRadioButton1.isSelected())  == true)
          { 
              jLabel2.setText("right"); 
            //  jLabel2.setText(null); // 
          buttonGroup1.clearSelection();
     
    jLabel1.setText("how old am I");
     
    jRadioButton1.setText("15");
    jRadioButton2.setText("16");
    jRadioButton3.setText("17");
    jRadioButton4.setText("18");
     
          }
          else jLabel2.setText("wrong");
    Last edited by helloworld922; June 4th, 2010 at 07:07 PM. Reason: please use [code] tags

  5. #4
    Member Darryl.Burke's Avatar
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    Default Re: if and else

    Quote Originally Posted by javapenguin View Post
    I'm not very good at RadioButtons as I haven't really used them, but would this help:

    if(JRadioButton1.isSelected() == true)
    That's just ... silly. The if statement requires a boolean condition, which isSelected() already returns.

    It is NEVER required to compare a boolean with true or false.

    db

  6. #5
    Member Darryl.Burke's Avatar
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    Default Re: if and else

    Quote Originally Posted by AbdulAziz Bader View Post
    although there is no errors in my code, its not working

    if the answer is right the radio buttons should be cleared, but its not working
    Chances are you have more than one variable with the same name: the one an instance field, the other a method local variable that hides it.

    To get better help sooner, post a SSCCE. <== link

    db

  7. #6
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  8. #7
    Junior Member shadihrr's Avatar
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    Default Re: if and else

    you have to try remove method to clear it and then call revalidate(); method to refresh your page (it depends on your whole code of course )

  9. #8
    Member Darryl.Burke's Avatar
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    Default Re: if and else

    Quote Originally Posted by shadihrr View Post
    you have to try remove method to clear it and then call revalidate(); method to refresh your page (it depends on your whole code of course )
    The question was about clearing the selection in a ButtonGroup, not about removing components from a visible GUI.

    db

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    shadihrr (June 5th, 2010)

  11. #9
    Junior Member shadihrr's Avatar
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    Default Re: if and else

    The question was about clearing the selection in a ButtonGroup, not about removing components from a visible GUI.
    I meant that you have to remove a specific component by using component's remove method
    I mention that it depends on the whole code to do it!!

  12. #10
    Member Darryl.Burke's Avatar
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    Default Re: if and else

    Quote Originally Posted by shadihrr View Post
    I meant that you have to remove a specific component by using component's remove method
    I mention that it depends on the whole code to do it!!
    So you answered a question other than the one asked. That must have been helpful!

    db