Jtable未返回最后一个单元格值

Question

这是我的表类

package build;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;

public class Table
{
private ArrayList<Column> columns;
private String NAME;
private static int count=0;
public Table() 
{
    setColumns(new ArrayList<Column>());
    NAME=new String();

    this.NAME="Table"+count;
    count++;
}

public void AddColumn(Column column)
{
    for(Column c: getColumns())
    {
       if(c.getname().equals(column.getname())){return;}
    }

    getColumns().add(column);

}
public int getCount(){return count;}
public void SaveToFile() throws IOException
{


    FileWriter fw = new FileWriter("C:/Users/Ashad/Desktop/text.txt", true);
    BufferedWriter bw = new BufferedWriter(fw);
     bw.write("\r\n");
    bw.write(this.NAME);
     bw.write("\r\n");

 for(Column c: getColumns())
 {
 bw.write("\r\n");
        bw.write(c.getname()+"  ");

        bw.write(c.getdatatype()+"  ");


 if(c.getPK()== true)
 {
        bw.write("true"+"  ");

 }    
    else
    {   bw.write("false"+"  ");

    }
if(c.getNN()== true)
{
    bw.write("true"+"   ");

}     
else
    {bw.write("false"+"  "); } 



 }
 bw.close();
}

  public boolean DeleteColumn(String name)
  {
    for (Column c : getColumns())
    {
        if (c.getname().equals(name)) {return getColumns().remove(c);}
    }
    return false;
  }

 public void viewColumns()
 {
      System.out.append(NAME+"  ");

    for(Column c: getColumns())
    {
      System.out.append("\n");
      System.out.append(c.getname()+"  ");

      System.out.append( c.getdatatype()+"  ");

      if(c.getPK()== true)
      {
         System.out.print(true);
      }   
          else
        System.out.print(false);  
      }
     }

public String getNAME() {

    return NAME;
}

public ArrayList<Column> getColumns() {
    return columns;
}

public void setColumns(ArrayList<Column> columns) {
    this.columns = columns;
}



  }

 table.setModel(new DefaultTableModel(

                  new Object[][] {
                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},

                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},
                  {null, null, null, null},
                  },
        new String[] {
            "Column Name", "Data Type", "NN", "PK"
                        }
              ) {
                    Class[] columnTypes = new Class[] {
                String.class, Object.class, Boolean.class, Boolean.class
            };
        public Class getColumnClass(int columnIndex) {
                return columnTypes[columnIndex];
        }

 btnNewButton.addActionListener(new ActionListener() 
   {
    @Override
    public void actionPerformed(ActionEvent e) {

      // getTable Values 
       for (int r = 0; r < model.getRowCount(); r++)
        {
           if((String)model.getValueAt(r, 0) != null)
         {

                    Column col=new Column();

            col.setname((String) model.getValueAt(r, 0)) ;
            col.setdatatype((String) model.getValueAt(r, 1));


             /*  if((Boolean)model.getValueAt(r, 2)== true)
                       {
                col.setPK(true); 
               }


             if((Boolean)model.getValueAt(r, 3)== true)
               {
                    col.setNN(true); 
                    }
               */

                    T.AddColumn(col);

             }
                else 
                       break;
            }
           try {
            T.SaveToFile();
            } catch (IOException e1) {

            e1.printStackTrace();
                    }
            T.viewColumns();
           frame.setVisible(false); 
                        }
                    });

如果（（布尔）model.getValueat（r,3)==true){col.setpk（true）；}

它给出错误，因为返回类型是布尔型。

Answer 1

它不保存最后一个值

也许表停止编辑会有所帮助。