swing jtable默认显示多行

Question

我正在使用java swing和NetBeans开发桌面应用程序它使用带有自定义表模型的jtable来呈现数据.我希望在表中显示最小行数,这样即使要显示的实际行数小于最小值,表也应显示其他虚拟行以构成最小数量.

下面是表模型的代码片段

public class MyTableModel extends AbstractTableModel {

    private List<List<Object>> dataList = new ArrayList<>();
     private String[] header = { "ID","SUBJECT","LETTTER FROM","LETTER DATE","DATE RECEIED",
                                  "REMARKS","DATE DISPATCHED","DESTINATION OFFICE"};


    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 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) { 
    return dataList.get(row).get(col);
    }

    @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;
        }
    }

任何可用的建议.

Answer 1

首先,您需要返回minRowCount行数或行数,这些行数要大一些......

@Override
public int getRowCount() {
    return Math.max(dataList.size(), minRowCount);
}

然后,您需要检查值的请求是否在数据列表的范围内

@Override
public Object getValueAt(int row, int col) { 
    Object value = null;
    if (row < dataList.size()) {
        value = dataList.get(row).get(col);
    }
    return value;
}

如果您打算使表格可编辑,则还需要调整isCellEditable和setValueAt方法