Estoy tratando de encontrar una manera de colocar un panel que contenga cuadros combinados en mi JFrame en una nueva línea usando gridbaglayout. De momento aparece junto a otro panel del mismo tipo.

Esto es lo que parece:

Aquí está el código para las áreas particulares

 JPanel saleOfferPanel = new JPanel(); JLabel dateOfSale = new JLabel("Select Date of Sale:"); saleOfferPanel.add(dateOfSale); JLabel saleDay = new JLabel("Day:"); saleOfferPanel.add(saleDay); JComboBox<Integer> dayOfSale = new JComboBox<>(); saleOfferPanel.add(dayOfSale); JLabel saleMonth = new JLabel("Month:"); saleOfferPanel.add(saleMonth); JComboBox<Integer> monthOfSale = new JComboBox<>(); saleOfferPanel.add(monthOfSale); JLabel saleYear = new JLabel("Year:"); saleOfferPanel.add(saleYear); JComboBox<Integer> yearOfSale = new JComboBox<>(); saleOfferPanel.add(yearOfSale); JPanel endSalePanel = new JPanel(); JLabel endOfSale = new JLabel("Select End Date of Sale:"); saleOfferPanel.add(endOfSale); JLabel endDay = new JLabel("Day:"); saleOfferPanel.add(endDay); JComboBox<Integer> endDayOfSale = new JComboBox<>(); saleOfferPanel.add(endDayOfSale); JLabel endMonth = new JLabel("Month:"); saleOfferPanel.add(endMonth); JComboBox<Integer> endMonthOfSale = new JComboBox<>(); saleOfferPanel.add(endMonthOfSale); JLabel endYear = new JLabel("Year:"); saleOfferPanel.add(endYear); JComboBox<Integer> endYearOfSale = new JComboBox<>(); saleOfferPanel.add(endYearOfSale); setLayout(new GridBagLayout()); GridBagConstraints gbc = new GridBagConstraints(); gbc.weightx = 0.5; gbc.weighty = 0; gbc.anchor = GridBagConstraints.NORTHWEST; //other panels... //panels in question gbc.gridx = 0; gbc.gridy = 9; gbc.gridheight = 1; add(saleOfferPanel, gbc); gbc.gridx = 0; gbc.gridy = 10; gbc.gridheight = 1; add(endSalePanel, gbc);

Esperando que alguien pueda ofrecer ayuda.

Gracias