java - 重写 AbstractTableModel 类中的 isCellEditable 方法后 JTable 不可编辑

Question

我的 AbstractTableModel 的 isCellEditable(row, column); 方法被覆盖，我检查过当我点击有问题的单元格时它返回 true 或 false 正确，但是，它不允许我编辑单元格:

private class KAMModel extends AbstractTableModel {
    private final String[] column = {"Member Number", "Member Name", "Secondary Name", "Address", "Phone", "Tickets"};
    private final Class<?>[] types = {Double.class, String.class, String.class, String.class, String.class, Integer.class};
    private final boolean[] editable = {false, false, false, false, false, true};
    private ArrayList<Object[]> data;

    // skip other overridden methods
    @Override 
    public boolean isCellEditable(int row, int column) {
        System.out.println(editable[column]); // prints correct true/false based on the column
        return editable[column];
    }
}

为什么我会看到 isCellEditable 被触发，并且还正确地告诉我我的列是否可编辑，但我无法编辑该列。它只是突出显示该行。单元格已显示轮廓，但我无法对其进行编辑。

更新:

可运行代码:

package kiss;

import java.math.BigDecimal;
import java.util.ArrayList;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

public class kiss extends javax.swing.JFrame {

    private KAMModel kam = new KAMModel();

    public kiss() {
        initComponents();
        kam.search("", "", "", "", "");
    }

    @SuppressWarnings("unchecked")
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTable1.setModel(kam);
        jScrollPane1.setViewportView(jTable1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 300, Short.MAX_VALUE)
    );

    pack();
}// </editor-fold>                        

/**
 * @param args the command line arguments
 */
public static void main(String args[]) {
    /* Set the Nimbus look and feel */
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(kiss.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(kiss.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(kiss.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(kiss.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new kiss().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
// End of variables declaration                   
private class KAMModel extends AbstractTableModel {
    private final String[] column = {"Member Number", "Member Name", "Secondary Name", "Address", "Phone", "Tickets"};
    private final Class<?>[] types = {Double.class, String.class, String.class, String.class, String.class, Integer.class};
    private final boolean[] editable = {false, false, false, false, false, true};
    private ArrayList<Object[]> data;

    public KAMModel() {
        super();
    }
    @Override
    public Object getValueAt(int row, int col) {
        return data.get(row)[col];
    }
    @Override
    public int getColumnCount() {
        return column.length;
    }
    @Override
    public String getColumnName(int i) {
        return column[i];
    }
    @Override
    public int getRowCount() {
        if (data == null) return 0;
        return data.size();
    }
    @Override
    public Class getColumnClass(int column) {
        return types[column].getClass();
    }
    @Override 
    public boolean isCellEditable(int row, int column) {
        System.out.println(editable[column]);
        return editable[column];
    }
    public void search(String memberNumber, String acctNumber, String memberName, String phoneNumber, String address) {
        data = new ArrayList<>();
        data.add(new Object[] {"123456789", "John Smith", "Jane Smith", "123 Main St.", "555-555-1212", ""});
        fireTableDataChanged();
    }
    @Override
    public void fireTableDataChanged() {
        super.fireTableDataChanged();
        resizeColumns();
    }
    public void resizeColumns() {
        float[] percents = {8f, 20f, 20f, 39f, 10f, 3f};
        int tableWidth = jTable1.getWidth();
        TableColumn tc;
        TableColumnModel tcm = jTable1.getColumnModel();
        for (int x = 0; x < 6; x++) {
            tc = tcm.getColumn(x);
            int cwidth = Math.round(percents[x] * tableWidth);
            tc.setPreferredWidth(cwidth);
        }
    }
}

Answer 1

代码中有2处错误:

1. 您要在模型中添加 "123456789" 和 ""，尽管这些值应该是 Double 和 Integer 类型
2. 您要为每个列返回 Class.class 作为列类。将 return types[column].getClass(); 替换为 return types[column];。

当然，您忘记实现 setValueAt()，所以即使单元格是可编辑的，编辑后的值也不会存储在模型中。