CODEWITHSUNDEEP
javaswingradio-buttonbooleanbuttongroup
Akrum Anjum
Akrum Anjum

Reputation: 1

Java - If ButtonGroup1 is not selected then show message box

I am working on my college project, where we have to design a program for a Sandwich shop. I am stuck on one place. I want to show the message box if nothing has been selected in buttongroup1.

I tried this bit of code but it doesn't seem to be working correctly:

boolean ButtonGroup1 = false;
 if (ButtonGroup1 == false)
     JOptionPane.showMessageDialog (null, "Pleace Selete the Sandwiches order" );``

here is the program:

private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {                                         


/* Errors -------------------------------*/
    buttonGroup1.add(HamRButton);
    buttonGroup1.add(ChickenRButton);
    buttonGroup1.add(CheeseRButton);
    buttonGroup1.add(PorkRButton);
    buttonGroup1.add(TunaRButton);

    buttonGroup2.add(WaterRButton);
    buttonGroup2.add(BottleofPOP);
    buttonGroup2.add(CanofPoP);

    buttonGroup3.add(CheeseExButton);
    buttonGroup3.add(SaladExButton);
    buttonGroup3.add(HamExButton);
    buttonGroup3.add(TunaExButton);
    buttonGroup3.add(ChickenExButton);
    buttonGroup3.add(PorkExButton);


  boolean buttonGroup1 = false;
  if (!buttonGroup1){
   JOptionPane.showMessageDialog(null, " ");
  }

Upvotes: 0

Views: 2146

Answers (1)

Sudhakar Tillapudi
Sudhakar Tillapudi

Reputation: 26209

Step1 : you need to iterate over all JRadioButtons inside ButtonGroup.
Step2 : cast the exach item of ButtonGroup into JRadioButton
Step3: try to identify the each item ether is selected or not by calling isSelected() function.
Step4: if any item in ButtonGroup is selected make the boolean variable buttonGroup1 to true and quit the loop.
Step5: finally check the boolean variable to display the Message

Try This:

 boolean buttonGroup1 = false;     
 Enumeration<AbstractButton> allRadioButton=btngroup.getElements();  
 while(allRadioButton.hasMoreElements())  
 {  
   JRadioButton temp=(JRadioButton)allRadioButton.nextElement();  
   if(temp.isSelected())  
   {  
     buttonGroup1 =true;
     break;
   }  
 }
if (!buttonGroup1)
     JOptionPane.showMessageDialog (null, "Pleace Selete the Sandwiches order" );

Upvotes: 1

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