Thread: Creating Dynamically Radio Buttons, Labels

Hi everybody,

I am developing a desktop application which evaluates an excel file. In the excel file there are Course Titles, Course Codes etc. and my program has to list these cells with radiobuttons for selecting a course. The excel part has no problem, the program reads the data and put them in a string arrays.It puts every column into a different String array, so i have 6 string arrays (every one has about 600 records) . I pass them to GUI for printing, selecting etc.

My problem starts here: I thought a solution like; Create jradiobuttons and jlabels with using index numbers of arrays, list them like an excel appearance. i need to create labels and radio buttons dynamically, because the excel file is not static, the information in it can change in time. I tried some ways to create Radiobuttons and Labels dynamically but i can't ! I used GroupLayout for creation. As a result, i need a solution or a new idea. Maybe i am thinking in a hard way, because i am a little newbie.

I thought using tables but it seems very amateur to me.

The exact issue is "How to create radiobuttons and labels dynamically ?", i want to create radiobuttons and labels during the execution. But, i don't know how to do.

I am asking what is the logic behind creating labels and buttons during the execution time. I added my code, this is adding only one row, i need to add 600 more rows. But can't figure out how to do it.

public void createListDynamically(String[] code, String[] title){
 
 
 
         for(int i=0;i<=code.length;i++){
 
                      String indexStr = String.valueOf(i);
 
                      jRadioList.add(new JRadioButton(""));
                      jLabelCode.add(new JLabel(code[i]));
                      jLabelTitle.add(new JLabel(title[i]));
 
                      jRadioList.get(i).setName(indexStr); //set name        
                      jLabelCode.get(i).setName(indexStr); //set name
                      jLabelTitle.get(i).setName(indexStr); //set name
 
                      javax.swing.GroupLayout layout = new javax.swing.GroupLayout(jPanel1);
                        jPanel1.setLayout(layout);
 
                        layout.setAutoCreateGaps(true);
                        layout.setAutoCreateContainerGaps(true);
 
                        layout.setHorizontalGroup(layout.createSequentialGroup()
                            .addComponent(jRadioList.get(i))
                            .addComponent(jLabelCode.get(i))
                            .addComponent(jLabelTitle.get(i))
                       );
 
                        layout.setVerticalGroup(layout.createSequentialGroup()
                            .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                            .addComponent(jRadioList.get(i))
                            .addComponent(jLabelCode.get(i))
                            .addComponent(jLabelTitle.get(i)))
                        );
                  }

Untitled.jpg

What i want to do is in the image, but my code adds only first row.

my code adds only first row.

Can you show what your program creates?

Add printlns in your code to show where and what is being executed. Maybe it only executes once.

Ok, i will give a simple explanation: i want to create 700 jradiobuttons and 700 jlabels. The appearance must be like a given SS which i put my previous post. So i am asking to you how can i create 700 buttons ?

how can i create 700 buttons ?

use a loop:

for(int i=0; i < 700; i++) {    // create 700 buttons
   JButton btn = new JButton();  // create new button
}

The appearance must be like a given SS

Can you explain what SS is?

If you want an answer that relates to your code, you will have to post your code.

SS means ScreenShot

I almost solved the problem, but still need some changes. I am putting a screenshot and the code.

Now the problem is horizontal gaps, i am studying on that, but still you can give an advice to me

SS.jpg

public void CreateListDynamically(String[] courseCodes, String[] courseTitles, String[] courseCredits, String[] courseOffto, String[] courseIstructors, String[] courseCampuses){
 
        System.out.println(courseCodes.length);
 
         for(int i=0;i<=600;i++){
 
                      String indexStr = String.valueOf(i);
 
                      jRadioLists.add(new JRadioButton(""));
                      jLabelCodes.add(new JLabel(courseCodes[i]));
                      jLabelTitles.add(new JLabel(courseTitles[i]));
                      jLabelCredits.add(new JLabel(courseCredits[i]));
                      jLabelOffo.add(new JLabel(courseOffto[i]));
                      jLabelInsructors.add(new JLabel(courseIstructors[i]));
                      jLabelCampuses.add(new JLabel(courseCampuses[i]));
 
                      jRadioLists.get(i).setName(indexStr); //set name        
                      jLabelCodes.get(i).setName(indexStr); 
                      jLabelTitles.get(i).setName(indexStr); 
                      jLabelCredits.get(i).setName(indexStr); 
                      jLabelOffo.get(i).setName(indexStr); 
                      jLabelInsructors.get(i).setName(indexStr); 
                      jLabelCampuses.get(i).setName(indexStr); 
 
 
                  }
 
          jPanel1.setLayout(new GridLayout(0, 7, 18, 1));
 
          for (int i = 0; i < 600; i++)  
          {
            jPanel1.add(jRadioLists.get(i));    
            jPanel1.add(jLabelCodes.get(i));  
            jPanel1.add(jLabelTitles.get(i));
            jPanel1.add(jLabelCredits.get(i));
            jPanel1.add(jLabelOffo.get(i));
            jPanel1.add(jLabelInsructors.get(i));
            jPanel1.add(jLabelCampuses.get(i));
 
            buttonGroup.add(jRadioLists.get(i)); //set button group
          } 
 
          jPanel1.setBorder(BorderFactory.createTitledBorder("Ders Listesi"));
 
    }
}

Now the problem is horizontal gaps

Where are the gaps?

There are too much space beteween columns, i am trying to set 18 px but not effecting to GUI.

Have you tried setting the sizes of the components you are using to build the GUI?

Originally Posted by Norm

Have you tried setting the sizes of the components you are using to build the GUI?

I thought that but grid layout is not allowed. So i will use gridbag layout, it is more complex and more flexible as read from an article. When i changed the code i will post again...Btw thank you for your attention.

ds.jpg

With gridbag layout it is easy to make a mistake/bug, it is so complex. So again i decided to use simple gird layout. I addedd 7 more panels to my main panel, and put the data into them seperately. I can arrange the horizontal gaps between columns by hand with netbeans. The problem is solved.