Need help placing objects in JPanel

Question

      public SimpleTab()
            ButtonGroup group = new ButtonGroup();
            group.add(videoandaudio);
            group.add(audioonly);
            group.add(videoonly);
            videoandaudio.setSelected(true);    
            JFrame frame1 = new JFrame("project");
            frame1.setSize(1000, 700);
            JLabel urllabel = new JLabel("URL");
            JLabel songlabel = new JLabel ("Enter Song");
            JLabel artistlabel = new JLabel ("Enter Artist");
            JLabel crop1label = new JLabel ("Start Time");
            JLabel crop2label = new JLabel ("Stop Time");
            url.setColumns(25);
            GridBagLayout gbl;
            GridBagConstraints gbc;
            JEditorPane jep;
            gbl=new GridBagLayout();
            gbc=new GridBagConstraints();
            p.setBounds(0,0,30,600);
            p.setLayout(gbl);
            gbc.gridx=0;
            gbc.gridy=-20;
            gbl.setConstraints(urllabel,gbc);
            gbc.gridx=0;       
            gbc.gridy=0;
            gbc.weightx=0.0;
            gbl.setConstraints(urllabel,gbc);
            p.add(urllabel);
            gbc.gridx=10;
            gbc.gridy=0;
            gbc.weightx=1.0;
            gbl.setConstraints(url,gbc);
            p.add(url);
            gbc.gridx=0;
            gbc.gridy=20;
            gbc.weightx=0.0;
            gbl.setConstraints(artistlabel,gbc);
            p.add(artistlabel);
            gbc.gridx=10;
            gbc.gridy=20;
            gbc.weightx=1.0;
            gbl.setConstraints(artist,gbc);
            p.add(artist,gbc);
            gbc.gridx=0;
            gbc.gridy=40;
            gbc.weightx=0.0;
            gbl.setConstraints(songlabel,gbc);
            p.add(songlabel);
            gbc.gridx=10;
            gbc.gridy=40;
            gbc.weightx=0;
            gbl.setConstraints(song,gbc);
            p.add(song,gbc);
            gbc.gridx=0;
            gbc.gridy=60;
            gbc.weightx=0.0;       
            gbl.setConstraints(crop1label,gbc);
            p.add(crop1label,gbc);
            gbc.gridx=10;
            gbc.gridy=60;
            gbc.weightx=1.0; 
            gbl.setConstraints(crop1,gbc);
            p.add(crop1,gbc);
            gbc.gridx=0;
            gbc.gridy=80;
            gbc.weightx=0.0;
            gbl.setConstraints(crop2label,gbc);
            p.add(crop2label);
            gbc.gridx=10;
            gbc.gridy=80;
            gbc.weightx=1.0;
            gbl.setConstraints(crop2,gbc);
            p.add(crop2,gbc);
            gbc.gridx=0;
            gbc.gridy=110;
            gbc.weightx=0.0;
            jPanel1.setBorder(BorderFactory.createEtchedBorder());
            jPanel1.setBounds(new Rectangle(70, 40, 10, 200));
            gbc.gridy = 0;
            gbl.setConstraints(videoandaudio, gbc);
            jPanel1.add(videoandaudio);
            gbc.gridy = 20;
            gbl.setConstraints(audioonly, gbc);
            jPanel1.add(audioonly);
            gbc.gridy = 40;
            gbl.setConstraints(videoonly, gbc);
            jPanel1.add(videoonly);
            gbc.gridx = 0;
            gbc.gridy = 190;
            gbl.setConstraints(jPanel1, gbc);
            p.add(jPanel1);
            DownloadsTableModel1.addColumn("Video File");
            DownloadsTableModel1.addColumn("Status");
            DownloadsTable.getColumnModel().getColumn(0).setPreferredWidth(200);
            DownloadsTable.getColumnModel().getColumn(1).setPreferredWidth(200);
            DownloadsTable.setColumnSelectionAllowed(false);
            DownloadsTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
            DownloadsTable.setDefaultRenderer(Object.class, new DownloadsTableCellRenderer());
            JScrollPane jScrollPane1 = new JScrollPane();           
            jScrollPane1.setBounds(new Rectangle(10, 130, 400, 90));
            jScrollPane1.getViewport().add(DownloadsTable);
            gbc.gridx = 0;
            gbc.gridy = 210;
            gbl.setConstraints(jScrollPane1,gbc);
            p.add(jScrollPane1);
            gbc.gridx=1;
            gbc.gridy=230;
            gbc.weightx=0.0;
            JButton downloadbutton = new JButton();
            downloadbutton.setText("Download");
            gbl.setConstraints(downloadbutton,gbc);
            p.add(downloadbutton);
            JButton pausebutton = new JButton();
            pausebutton.setText("Freeze");
            gbc.gridx = 2;
            gbc.gridy = 230;
            gbl.setConstraints(pausebutton,gbc);
            p.add(pausebutton);
            JButton cancelbutton = new JButton();
            cancelbutton.setText("Cancel");
            gbc.gridx = 3;
            gbc.gridy = 230;
            gbl.setConstraints(cancelbutton, gbc);
            p.add(cancelbutton);
            frame1.add(p);
            frame1.show();
      }[http://www.geocities.com/justinknag/jjjjunit.jpg]
I need to center the radio buttons, as well as the table. Also, I need to create some space in between everything.

Answer 1

You know that you can nest JPanels, each with its own layout, you don't have to try to have everything placed in one JPanel that uses a single grand layout manager. I recommend that you read the Sun tutorial on layout managers, and try playing with them til you figure out what will work best. As it is all I see is an attempt to dump everything in one panel with GridBagLayout.
Also, you would do well to clean up the code, to refactor it into several methods, otherwise it will become a spaghetti code mess.
Good luck!
Edit: Here's what I got when I did this:
[flickr pic|http://farm4.static.flickr.com/3155/2906451640_8deedd7aa3_o.jpg]
I used
BoxLayout over-all for the main panel
A combination of BorderLayout and GridLayout for the top panel
gridlayout for the next radiobutton panel
jscrollpane for the jtable
and gridlayout for the buttons
I avoided GridBagLayout, because I truly despise it.
YMMV of course.
Edited by: Encephalopathic on Oct 1, 2008 7:35 PM