Question

Simply what I want to do is to show some data in JTable when user click a button and it works correctly, however something weird is happening. When I click button at first time nothing happens but when I maximize frame, the table appears!

ActionListener

b2.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                boolean state = external.isSelected();
                DefaultTableModel model = new DefaultTableModel(ManhattanTable(values), Headers(values));
                   JTable table = new JTable(model);
                   table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
                   container.add(new JScrollPane(table));
                   table.setVisible(false);
                if(state) {
                    PrintStream out = null;
                    try {
                        out = new PrintStream(new FileOutputStream("output.txt"));
                    } catch (FileNotFoundException e1) {
                        // TODO Auto-generated catch block
                        e1.printStackTrace();
                    }
                    System.setOut(out);
                    long start= System.currentTimeMillis();
                    Manhattan(values);
                    long end=System.currentTimeMillis();
                    out.println("time: "+(end-start)+" milliseconds");
                    out.println("Number of input data: "+values.size());    
                } else {
                     table.setVisible(true);
                }           
            }
        }); 

Anyone knows, why this strange behaviour?

Answer 1

After adding the table, call container.revalidate()