How to center in JTable cell a value?

Question

How to center a value in JTable cell? I\'m using Netbeans.

Answer 1

I had a similar problem. I wanted to align a single cell depending on the value of another cell. If cell X was NULL, then cell Y should be RIGHT aligned. Else, cell Y should be LEFT aligned.

I found this solution really helpful. It consists on creating a custom Render, extending DefaultTableCellRender.

Here's the code:

public class MyRender extends DefaultTableCellRenderer{

@Override
 public Component getTableCellRendererComponent(JTable table,Object value,boolean isSelected,boolean hasFocus,int row,int column){
    super.getTableCellRendererComponent (table, value, isSelected, hasFocus, row, column);
    MyTableModel mtm = (MyTableModel)table.getModel();
    switch(column){
        case Y : 
            if(mla.getValueAt(row,X)!=null)
                setHorizontalAlignment(SwingConstants.RIGHT);
            else
                setHorizontalAlignment(SwingConstants.LEFT);
            break;
     }
    return this;
   }

 }

After that, just create a new instance of MyRender and set it to column Y, in this case. I do this when I load the information on the table.

MyRender render = new MyRender();
table.getColumnModel().getColumn(Y).setCellRender(render);

Hope it's useful!