Jtable, add multi-lines[Cell span] +Format table

Question

I need to do something like this:

Right now I have a table like image 1, but I wanted to create a table like image 2. How can I create something like this? Any ideas?

The closest example I saw was: http://www.java2s.com/Code/Java/Swing-Components/MultiLineCellExample.htm

[EDIT]

To create the multi-lines I used this class "Attributivecelltablemodel" found on the site: http://www.java2s.com/Code/Java/Swing-Components/MultiSpanCellTableExample.htm

With this code, I was able to implement multi-lines, using a cycle that runs through a Map<String,Map<String,Obejct>>, the first key corresponds to the first column and the second map corresponds to the rest. The "Attributivecelltablemodel" and a Defaulttablemodel.

Code:

 AttributiveCellTableModel ml=new AttributiveCellTableModel(cont,4);
    final MultiSpanCellTable table = new MultiSpanCellTable( ml );
   
    table.setShowGrid(false);
    table.setIntercellSpacing(new Dimension(2,2));
    table.setBackground(Color.white);
    
    table.setSize(400, 400);
    table.setLocation(10, 10);
    this.getContentPane().add(new JScrollPane(table));
    this.add(table);
    final CellSpan cellAtt =(CellSpan)ml.getCellAttribute();
    
     int LineATUAL=0;
     int LineTOTAL=0;      
     for (Map.Entry<String,Map<String,LinhasOnline>>  entry : mapTudo.entrySet()) {
         int INTERVALO=0;
         for (Map.Entry<String, LinhasOnline> produtos : entry.getValue().entrySet()) {
             
                INTERVALO++;
                ml.setValueAt(produtos.getValue().getLinha(), LineATUAL, 0);
                ml.setValueAt(produtos.getValue().getProduto(), LineATUAL, 1);
                ml.setValueAt(produtos.getValue().getcont(), LineATUAL, 2);
                ml.setValueAt(produtos.getValue().getmax(), LineATUAL, 3);
                
                System.out.println("linha:" +LineATUAL);
                LineATUAL++;
         }
         mapSpanCell.put(entry.getKey(), INTERVALO);
    }
     for (Map.Entry<String, Integer> entry : mapSpanCell.entrySet()) {
         System.out.println("nome linha entry" +entry.getKey());
     }
     for (Map.Entry<String, Integer> entry : mapSpanCell.entrySet()) {
         //usadp para mandar parar todos os ciclos em baixo
         breakcycle:
         for (int i = 0; i < ml.getRowCount(); i++) {
             
             if(ml.getValueAt(i, 0).equals(entry.getKey())){
                 if(entry.getValue()>1){
                     System.out.println("vorrrraasd: "+entry.getValue());
                     int[] intervalo = new int[entry.getValue()];
                     for(int xx=0, y=i; y<i+entry.getValue();y++, xx++){
                         intervalo[xx]=y;
                         System.out.println("valor do Y" +y);
                     }
                     int[] columnss = {0};
//                         int[] rowss = intervalo;
                     cellAtt.combine(intervalo, columnss);
                     
                     break breakcycle;
                     
                 }
                 else {
                     System.out.println(" ola");
                 } 
             }
         }
    }

That returns me this table:

Now I’d like to add two things:

• Add the column names
• And remove the vertical lines

Someone can help me?

Answer 1

To hide the vertical lines of your table just use the method setShowVerticalLines() of your Jtable object passing the argument false.

tabela.setShowVerticalLines(false);

To show the header you must place Jtable inside a Jscrollpane.

scroll = new JScrollPane(tabela);
contentPane.add(scroll, BorderLayout.CENTER);

For the above examples consider that I created the attributes at class level, ie like this:

private JScrollPane scroll;
private JPanel contentPane;
private JTable tabela;