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文件大小: 6kb
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上传时间: 2010-07-28
详细说明： import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.DefaultComboBoxModel; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; public class ComboBoxDemo extends JFrame { private DefaultComboBoxModel model = new DefaultComboBoxModel(); private DefaultComboBoxModel model1 = new DefaultComboBoxModel(); private DefaultComboBoxModel model2 = new DefaultComboBoxModel(); private JComboBox firstComboBox; private JComboBox secondComboBox; private JComboBox t hirdComboBox; private String[] first = { "001", "002", "003" }; private String[] second_first = { "00101", "00102", "00103" }; private String[] second_second = { "00201", "00202", "00203" }; private String[] second_third = { "00301", "00302", "00303" }; private String[] third_first_first = { "0010101", "0010102", "0010103" }; private String[] third_second_first = { "0010201", "0010202", "0010203" }; private String[] third_third_first = { "0010301", "0010302", "0010303" }; private String[] third_second_second = { "0020101", "0020102", "0020103" }; private String[] third_first_second = { "0020201", "0020202", "0020203" }; private String[] third_third_second = { "0020301", "0020302", "0020303" }; private String[] third_first_third = { "0030101", "0030102", "0030103" }; private String[] third_second_third = { "0030201", "0030202", "0030203" }; private String[] third_third_third = { "0030301", "0030302", "0030303" }; public ComboBoxDemo() { setTitle("ComboBoxTest"); setSize(300, 200); setDefaultCloseOperation(EXIT_ON_CLOSE); for (int i = 0, n = first.length; i < n; i++) { model.addElement(first[i]); } firstComboBox = new JComboBox(model); firstComboBox.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { JComboBox source = (JComboBox) evt.getSource(); String item = (String) source.getSelectedItem(); try { if (item.equals("001")) { model1.removeAllElements(); for (int i = 0, n = second_first.length; i < n; i++) { model1.addElement(second_first[i]); } model2.removeAllElements(); for (int i = 0, n = third_first_first.length; i < n; i++) { model2.addElement(third_first_first[i]); } } else if (item.equals("002")) { model1.removeAllElements(); for (int i = 0, n = second_second.length; i < n; i++) { model1.addElement(second_second[i]); } model2.removeAllElements(); for (int i = 0, n = third_second_second.length; i < n; i++) { model2.addElement(third_second_second[i]); } } else if (item.equals("003")) { model1.removeAllElements(); for (int i = 0, n = second_third.length; i < n; i++) { model1.addElement(second_third[i]); } model2.removeAllElements(); for (int i = 0, n = third_first_third.length; i < n; i++) { model2.addElement(third_first_third[i]); } } else { System.out.println("error!"); } } catch (Exception e) { } } }); for (int i = 0, n = second_first.length; i < n; i++) { model1.addElement(second_first[i]); } secondComboBox = new JComboBox(model1); secondComboBox.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { JComboBox source = (JComboBox) evt.getSource(); String item1 = (String) source.getSelectedItem(); try { if (item1.equals("00101")) { model2.removeAllElements(); for (int i = 0, n = third_first_first.length; i < n; i++) { model2.addElement(third_first_first[i]); } } else if (item1.equals("00102")) { model2.removeAllElements(); for (int i = 0, n = third_second_first.length; i < n; i++) { model2.addElement(third_second_first[i]); } } else if (item1.equals("00103")) { model2.removeAllElements(); for (int i = 0, n = third_third_first.length; i < n; i++) { model2.addElement(third_third_first[i]); } } else if (item1.equals("00201")) { model2.removeAllElements(); for (int i = 0, n = third_second_second.length; i < n; i++) { model2.addElement(third_second_second[i]); } } else if (item1.equals("00202")) { model2.removeAllElements(); for (int i = 0, n = third_first_second.length; i < n; i++) { model2.addElement(third_first_second[i]); } } else if (item1.equals("00203")) { model2.removeAllElements(); for (int i = 0, n = third_third_second.length; i < n; i++) { model2.addElement(third_third_second[i]); } } else if (item1.equals("00301")) { model2.removeAllElements(); for (int i = 0, n = third_first_third.length; i < n; i++) { model2.addElement(third_first_third[i]); } } else if (item1.equals("00302")) { model2.removeAllElements(); for (int i = 0, n = third_second_third.length; i < n; i++) { model2.addElement(third_second_third[i]); } } else if (item1.equals("00303")) { model2.removeAllElements(); for (int i = 0, n = third_third_third.length; i < n; i++) { model2.addElement(third_third_third[i]); } } } catch (Exception e) { System.out.println(); } } }); for (int i = 0, n = third_first_first.length; i < n; i++) { model2.addElement(third_first_first[i]); } thirdComboBox = new JComboBox(model2); JPanel p = new JPanel(); p.add(firstComboBox); p.add(secondComboBox); p.add(thirdComboBox); getContentPane().add(p, "North"); setLocation(400, 200); setVisible(true); } public static void main(String[] args) { new ComboBoxDemo(); } } ...展开收缩
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