JPanel不会显示关于gui的数据

Question

嗨，我正在研究一个项目，我需要使用JTable。我将AbstractTableModel分类，然后将数据放入表中。这工作正常。我在AbstractTableModel中创建了一个新的JTable对象。接下来，我将其设为AutoScrollPane。当我将AutoScrollPane添加到GUI时，表格显示但没有任何数据。我将提供我认为必要的短代码片段，因为我的代码现在有点混乱。

//JPanel tableToShow = new JPanel();
    TablePane table = new TablePane(gp.txt);
    table.addData();
    JTable scrollTable = new JTable(table); 
    scrollTable.setPreferredScrollableViewportSize(new Dimension(500, 70));
    scrollTable.setFillsViewportHeight(true);
    JScrollPane scrollPane = new JScrollPane(scrollTable);
    //tableToShow.add(scrollPane);
    //text.setFont(new Font("Courier", Font.BOLD, 20));
    //text.setPreferredSize(new Dimension(1200,150));

    setLayout(new BorderLayout(10,10));
    add(jplRadio, BorderLayout.WEST);
    add(plotPanel, BorderLayout.EAST);
    add(label, BorderLayout.NORTH);
    add(scrollPane, BorderLayout.SOUTH);

和

import java.util.ArrayList;

import javax.swing.table.AbstractTableModel;


public class TablePane extends AbstractTableModel {

public String[] ColumnNames = {"Date", "Level", "Duration", "Weight"};
public String[][] data = null;
private TextImporter txt = null;

public TablePane(TextImporter txt) {
    this.txt = txt;
}

public void addData() {
    ArrayList<?> currentList = null;
    data = new String[4][txt.getSession().size()];
    for(int i = 0; i < ColumnNames.length; i++) {
        if(i == 0) {
            currentList = txt.getSession();
        } else if(i == 1) {
            currentList = txt.getAmplitude();
        } else if(i==2) {
            currentList = txt.getDuration();
        } else if(i==3) {
            currentList = txt.getLegPressure();
        }
        for(int j = 0; j < txt.getSession().size(); j++) {
            data[i][j] = (String) currentList.get(j);
        }
    }
    //System.out.print(data);

}

//  public void displayTable() {
//      
//  }

@Override
public int getColumnCount() {
    // TODO Auto-generated method stub
    return ColumnNames.length;
}

@Override
public int getRowCount() {
    // TODO Auto-generated method stub
    return 0;
}

@Override
public Object getValueAt(int arg0, int arg1) {
    // TODO Auto-generated method stub
    return null;
}

}

如果需要，我可以提供更多代码