我正在尝试实现一个特定的GUI，但是我无法将JPanel插入到我的jframe中，这是在另一个函数中初始化的，任何想法都是如何做到的？
这是我的代码：
public class CDRTable {
int totalRecords;
private final String[] columnNames = { "Year", "String", "Comment" };
private final DefaultTableModel model = new DefaultTableModel(null, columnNames) {
@Override
public Class<?> getColumnClass(int column) {
return (column == 0) ? Integer.class : Object.class;
}
};
private final TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(model);
private final JTable table = new JTable(model);
private final JButton first = new JButton(new AbstractAction("|<") {
public void actionPerformed(ActionEvent e) {
currentPageIndex = 1;
initFilterAndButton();
}
});
private final JButton prev = new JButton(new AbstractAction("<") {
public void actionPerformed(ActionEvent e) {
currentPageIndex -= 1;
initFilterAndButton();
}
});
private final JButton next = new JButton(new AbstractAction(">") {
public void actionPerformed(ActionEvent e) {
currentPageIndex += 1;
initFilterAndButton();
}
});
private final JButton last = new JButton(new AbstractAction(">|") {
public void actionPerformed(ActionEvent e) {
currentPageIndex = maxPageIndex;
initFilterAndButton();
}
});
private final JTextField field = new JTextField(2);
private final JLabel label = new JLabel();
public JComponent makeUI() throws ClassNotFoundException, SQLException {
table.setFillsViewportHeight(true);
table.setRowSorter(sorter);
Class.forName("org.h2.Driver");
Connection conn = DriverManager.getConnection("jdbc:h2:file:G:/hs_data/h2_db/test", "sa", "sa");
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM cdr LIMIT 1000");
totalRecords = 1000;
for (int i = 0; i < totalRecords; i++) {
model.addRow(new Object[] { 0,0,0 });
}
table.setModel(DbUtils.resultSetToTableModel(rs));
JPanel po = new JPanel();
po.add(field);
po.add(label);
JPanel box = new JPanel(new GridLayout(1, 4, 2, 2));
for (JComponent r : Arrays.asList(first, prev, po, next, last)) {
box.add(r);
}
int rowCount = model.getRowCount();
int v = rowCount % itemsPerPage == 0 ? 0 : 1;
maxPageIndex = rowCount / itemsPerPage + v;
initFilterAndButton();
label.setText(String.format("/ %d", maxPageIndex));
KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0);
field.getInputMap(JComponent.WHEN_FOCUSED).put(enter, "Enter");
field.getActionMap().put("Enter", new AbstractAction() {
public void actionPerformed(ActionEvent e) {
try {
int v = Integer.parseInt(field.getText());
if (v > 0 && v <= maxPageIndex) {
currentPageIndex = v;
}
} catch (Exception ex) {
ex.printStackTrace();
}
initFilterAndButton();
}
});
JPanel p = new JPanel(new BorderLayout());
p.add(box, BorderLayout.NORTH);
p.add(new JScrollPane(table));
return p;
}
private final int itemsPerPage = 100;
private int maxPageIndex;
private int currentPageIndex = 1;
private void initFilterAndButton() {
sorter.setRowFilter(new RowFilter<TableModel, Integer>() {
@Override
public boolean include(Entry<? extends TableModel, ? extends Integer> entry) {
int ti = currentPageIndex - 1;
int ei = entry.getIdentifier();
return ti * itemsPerPage <= ei && ei < ti * itemsPerPage + itemsPerPage;
}
});
first.setEnabled(currentPageIndex > 1);
prev.setEnabled(currentPageIndex > 1);
next.setEnabled(currentPageIndex < maxPageIndex);
last.setEnabled(currentPageIndex < maxPageIndex);
field.setText(Integer.toString(currentPageIndex));
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
CDRTable obj = new CDRTable();
obj.createAndShowGUI();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
});
}
public void createAndShowGUI() throws ClassNotFoundException, SQLException {
JFrame f = new JFrame();
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new CDRTable().makeUI());
f.setBounds(30, 50, 1300, 600);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}
当我尝试从createAndShowGUI()访问public JComponent makeUI()中初始化的jframe时，显示错误
f无法解决
我对JAVA很新，所以如果你对我的问题感到恼火，请不要理会：）
答案 0 :(得分：0)
不知何故，我实现了我想要的，所以我想我应该把答案放在这里。
public class CDRTable {
//JFrame f;
int totalRecords;
private final String[] columnNames = { "ANUMBER", "BNUMBER", "DATETIME" };
private final DefaultTableModel model = new DefaultTableModel(null, columnNames) {
@Override
public Class<?> getColumnClass(int column) {
return (column == 0) ? Integer.class : Object.class;
}
};
private final TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(model);
private final JTable table = new JTable(model);
private final JButton first = new JButton(new AbstractAction("|<") {
public void actionPerformed(ActionEvent e) {
currentPageIndex = 1;
initFilterAndButton();
}
});
private final JButton prev = new JButton(new AbstractAction("<") {
public void actionPerformed(ActionEvent e) {
currentPageIndex -= 1;
initFilterAndButton();
}
});
private final JButton next = new JButton(new AbstractAction(">") {
public void actionPerformed(ActionEvent e) {
currentPageIndex += 1;
initFilterAndButton();
}
});
private final JButton last = new JButton(new AbstractAction(">|") {
public void actionPerformed(ActionEvent e) {
currentPageIndex = maxPageIndex;
initFilterAndButton();
}
});
private final JTextField field = new JTextField(2);
private final JLabel label = new JLabel();
public JComponent makeUI(Container f) throws ClassNotFoundException, SQLException {
table.setFillsViewportHeight(true);
table.setRowSorter(sorter);
Class.forName("org.h2.Driver");
Connection conn = DriverManager.getConnection("jdbc:h2:file:G:/hs_data/h2_db/test", "sa", "sa");
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM cdr LIMIT 1000");
totalRecords = 1000;
for (int i = 0; i < totalRecords; i++) {
model.addRow(new Object[] { 0,0,0 });
}
table.setModel(DbUtils.resultSetToTableModel(rs));
JPanel po = new JPanel();
po.add(field);
po.add(label);
JPanel box = new JPanel(new GridLayout(1, 4, 2, 2));
for (JComponent r : Arrays.asList(first, prev, po, next, last)) {
box.add(r);
}
int rowCount = model.getRowCount();
int v = rowCount % itemsPerPage == 0 ? 0 : 1;
maxPageIndex = rowCount / itemsPerPage + v;
initFilterAndButton();
label.setText(String.format("/ %d", maxPageIndex));
KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0);
field.getInputMap(JComponent.WHEN_FOCUSED).put(enter, "Enter");
field.getActionMap().put("Enter", new AbstractAction() {
public void actionPerformed(ActionEvent e) {
try {
int v = Integer.parseInt(field.getText());
if (v > 0 && v <= maxPageIndex) {
currentPageIndex = v;
}
} catch (Exception ex) {
ex.printStackTrace();
}
initFilterAndButton();
}
});
UIManager.put("TabbedPane.selected", Color.lightGray);
JTabbedPane tabbedPane = new JTabbedPane();
f.add(tabbedPane);
JPanel panel = new JPanel();
tabbedPane.addTab("TABLE", null, panel, null);
panel.setBackground(Color.white);
JPanel panel_1 = new JPanel();
tabbedPane.addTab("GRAPH", null, panel_1, null);
panel_1.setBackground(Color.white);
JScrollPane scrollpane = new JScrollPane();
panel.add(scrollpane, BorderLayout.SOUTH);
scrollpane.setViewportView(table);
table.getTableHeader().setBackground(new Color(26,82,118));
table.getTableHeader().setForeground(Color.white);
table.getTableHeader().setPreferredSize(new Dimension(100, 40));
table.setRowHeight(30);
first.setBackground(new Color(84, 153, 199));
prev.setBackground(new Color(84, 153, 199));
next.setBackground(new Color(84, 153, 199));
last.setBackground(new Color(84, 153, 199));
first.setForeground(Color.white);
prev.setForeground(Color.white);
next.setForeground(Color.white);
last.setForeground(Color.white);
panel.add(box);
panel.add(new JScrollPane(table));
return scrollpane;
}
private final int itemsPerPage = 100;
private int maxPageIndex;
private int currentPageIndex = 1;
private void initFilterAndButton() {
sorter.setRowFilter(new RowFilter<TableModel, Integer>() {
@Override
public boolean include(Entry<? extends TableModel, ? extends Integer> entry) {
int ti = currentPageIndex - 1;
int ei = entry.getIdentifier();
return ti * itemsPerPage <= ei && ei < ti * itemsPerPage + itemsPerPage;
}
});
first.setEnabled(currentPageIndex > 1);
prev.setEnabled(currentPageIndex > 1);
next.setEnabled(currentPageIndex < maxPageIndex);
last.setEnabled(currentPageIndex < maxPageIndex);
field.setText(Integer.toString(currentPageIndex));
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
CDRTable obj = new CDRTable();
obj.createAndShowGUI();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
});
}
public void createAndShowGUI() throws ClassNotFoundException, SQLException {
JFrame f = new JFrame("CDR TABLE");
f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
f.getContentPane().add(new CDRTable().makeUI(f));
f.setBounds(30, 50, 1300, 600);
f.setLayout(new GridLayout(0, 2));
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}