java - 在抽象表模型中实现复选框

Question

我们正在尝试实现扩展抽象表模型的表模型。我们已经在抽象表模型中实现了复选框。到目前为止，我们无法更改该复选框的值。请给我们一些建议。

这是FileTableModel的代码:

import javax.swing.table.AbstractTableModel;
import java.text.SimpleDateFormat;

public class FileTableModel extends AbstractTableModel {

    private FileList sourceList;
    private FileList targetList;
    private ActionList actionList;

    private final String[] COLUMN_NAME = {"Name(Source)", "Size(B)", "Last modified", "Action",
        "Name(Target)", "Size(B)", "Last modified"};

    private Class[] columnClasses = new Class[]{
        String.class, Long.class, SimpleDateFormat.class, String.class,
        String.class, Long.class, SimpleDateFormat.class,
    };

    public FileTableModel(FileList sourceList, FileList targetList, ActionList actionList) {
        this.sourceList = sourceList;
        this.targetList = targetList;
        this.actionList = actionList;
    }

    public int getColumnCount() {
        return 7;
    }  // A constant for this model


    public int getRowCount() {
        return targetList.size();
    }  // # of files in dir


    public String getColumnName(int col) {
        return COLUMN_NAME[col];
    }


    public Class getColumnClass(int col) {
        return columnClasses[col];
    }

    public Object getValueAt(int row, int col) {
        switch (col) {
            case 0:
                if (sourceList.get(row) != null) return sourceList.get(row).getName();
                else return "";
            case 1:
                if (sourceList.get(row) != null) {
                    if (!sourceList.get(row).isDirectory())
                        return new Long((sourceList.get(row).length()));
                    else return "<Folder>";
                } else return "";

            case 2:
                SimpleDateFormat sourceDate = new SimpleDateFormat("HH:mm:ss");
                if (sourceList.get(row) != null)
                    return sourceDate.format(sourceList.get(row).lastModified());
                else return "";

            case 3:
                if (actionList.get(row) != null)
                    return actionList.get(row);
                else return "";
            case 4:
                if (targetList.get(row) != null) return targetList.get(row).getName();
                else return "";
            case 5:
                if (targetList.get(row) != null) {
                    if (!targetList.get(row).isDirectory())
                        return new Long((targetList.get(row).length()));
                    else return "<Folder>";
                } else return "";
            case 6:
                SimpleDateFormat targetDate = new SimpleDateFormat("HH:mm:ss");
                if (targetList.get(row) != null)
                    return targetDate.format(targetList.get(row).lastModified());
                else return "";

            default:
                return null;
        }
    }
}

Answer 1

您的表模型当前是只读的。添加此方法以使其可编辑:

@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
    return true;
}

您还可以仅使特定列可编辑:

private static final int COLUMN_INDEX_CHECK_BOX = 28;

@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
    return columnIndex == COLUMN_INDEX_CHECK_BOX;
}