鼠標點擊時更新JTable？

Question

我想創建一個JTable，當另一個面板被點擊時存儲鼠標位置。我創建了兩個面板，一個顯示錶格，另一個點擊鼠標。點擊時，表格沒有得到更新。貝婁是代碼：

類：TableGUI繪製表

public class JTableGUI extends JPanel { 
private static final int N_ROWS = 8; 
private static String[] header = { "X", "Y" }; 
private DefaultTableModel dtm = new DefaultTableModel(null, header) { 
    public Class<?> getColumnClass(int col) { 
     return getValueAt(0, col).getClass(); 
    } 
}; 

private JTable table = new JTable(dtm); 
private JScrollPane scrollPane = new JScrollPane(table); 
private JScrollBar vScroll = scrollPane.getVerticalScrollBar(); 
private int row; 
private boolean isAutoScroll; 

// Constructor 
public JTableGUI() { 
    this.setLayout(new BorderLayout()); 
    Dimension d = new Dimension(320, N_ROWS * table.getRowHeight()); 
    table.setPreferredScrollableViewportSize(d); 

    scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 
    vScroll.addAdjustmentListener(new AdjustmentListener() { 

     @Override 
     public void adjustmentValueChanged(AdjustmentEvent e) { 
      isAutoScroll = !e.getValueIsAdjusting(); 
     } 
    }); 
    this.add(scrollPane, BorderLayout.CENTER); 
    // Extra Panel 
    JPanel panel = new JPanel(); 
    this.add(panel, BorderLayout.SOUTH); 
} 

public void addRow(int x, int y) { 
    dtm.addRow(new Object[] { x, y }); 
} 
} 

類：JPanelGUI爲clickPanel

public class JPanelGUI { 

private JTableGUI gt; 
private JPanel clickPanel; 
private int WIDTH = 300, HEIGHT = 100; 

public JPanelGUI() { 
    clickPanel = new JPanel(); 
    clickPanel.setPreferredSize(new Dimension(WIDTH, HEIGHT)); 
    clickPanel.setBackground(Color.white); 
    clickPanel.addMouseListener(new MyMouseListener()); 
} 

public JPanel getPanel() { 
    return clickPanel; 
} 


public class MyMouseListener implements MouseListener { 
    @Override 
    public void mouseClicked(MouseEvent e) { 
     gt = new JTableGUI(); 
     gt.addRow(e.getX(), e.getY()); 
    }//Other listener methods.. 

} 

} 

Answer 1

public void mouseClicked(MouseEvent e) { 
    gt = new JTableGUI(); 
    gt.addRow(e.getX(), e.getY()); 
}// 

你不能把每一次創建JTableGUI的新實例鼠標點擊。

而是你：

1. 當您創建框架和你這個實例添加到幀創建一個實例。
2. 然後您將JTableGUI面板的引用作爲參數傳遞給JPanelGUI。然後，將此參數保存在JTableGUI類中，現在您的ActionLIstener可以訪問此變量。