初始化继承抽象类的子类

Question

我有一个扩展java swing中的AbstrctTableModel类的TableModel类，但是当我试图初始化不抽象的子类时，Netbeans 8.0 IDE抱怨我正在初始化一个抽象类。代码片段如下:

public class TableModel extends AbstractTableModel {
private List<List<Object>> dataList = new ArrayList<>();
 private String[] header = { "ID","SUBJECT","LETTTER FROM","LETTER DATE","DATE RECEIVED",
                              "REMARKS","DATE DISPATCHED","DESTINATION OFFICE"};
 private int minRowCount = 5;
public TableModel()
{  }
public List<List<Object>> getDataList() {
    return dataList;
}
public void setDataList(List<List<Object>> dataList) {       
    this.dataList = dataList;
    fireTableDataChanged();       
    fireTableStructureChanged();        
}
public void setHeader(String[] header) {
    this.header = header;
}
public String[] getHeader() {
    return header;
}
@Override
public int getRowCount() {
    return Math.max(minRowCount, dataList.size());
}
@Override
public int getColumnCount() {
    return header.length;
}
@Override
public String getColumnName(int col) {
return header[col];
}
@Override
public Object getValueAt(int row, int col) { 
    Object value = null;
    if(row < dataList.size())      
    {value = dataList.get(row).get(col);}
    return value;
}

 @Override
 public Class<?> getColumnClass(int column)
    {
        for (int row = 0; row < getRowCount(); row++)
        {   
            Object o = getValueAt(row, column);
            if (o != null)
            {
                return o.getClass();
            }              
        }
        return Object.class;
    }
}

是初始化Table Model类的代码。

 private TableColumnAdjuster tca;
 /**
 * Creates new form MyJFrame
 */
 private TableModel tableModel ;
public MyJFrame() throws CorruptIndexException, LockObtainFailedException, IOException,
                               ParseException, java.text.ParseException, SQLException 
{
    tableModel = new TableModel(); // the Netbeans IDEcomplains about this code
    initComponents();

}

Answer 1

您没有提供任何信息来指定投诉的确切性质，但我打赌AbstractTableModel有一个您的TableModel未能覆盖的抽象方法。在这种情况下，这将是一个编译错误。

如果这是真的，为这个方法提供一个具体的实现，你就可以进行下一步了