JTable&自定义TableModel未按预期运行

Question

因此，当我试图在程序中实现JTable时，我一直在阅读Java的“如何使用表”。我想要的是从数据库中获取一个字符串值列表，然后按列名和行名对它们进行排序。现在我知道没有像列那样的默认行标头，所以我通过将我的第一列设置为“行标头”来避开这个问题。因此，我决定为我的Jtable创建一个自定义表模型，以便正确地对数据进行排序（数据存储在字符串向量的向量中&列/行名分别作为字符串向量），但我遇到的只是问题。起初，我收到了一大堆索引错误数组，所以我添加了代码，显示了表模型中的数据放在JTable中的位置。下面是Jpanel中初始化Jtable的代码

    //other GUI stuff above: buttons, labels, etc.
    Vector<String> tableColNames = new Vector<String>(1);
    Vector<String> tableRowNames = new Vector<String>(1); 
    Vector<Vector<String>> tableData = new Vector<Vector<String>>(1,1); //<row, col>

    for(int i = 0; i <50; i++){
        tableData.insertElementAt(new Vector<String>(), i);
        for(int b = 0; b<5; b++){
            tableData.elementAt(i).insertElementAt("TestData", b);
        }
        tableRowNames.insertElementAt("TestRowNames", i);
    }

    for(int a = 0; a<5; a++){
        tableColNames.insertElementAt("TestColNames", a);
    }

    System.out.println(tableData.toString());


    table = new JTable(new SemesterTableModel(tableColNames, tableRowNames, tableData));
    table.getColumnModel().getColumn(0).setCellRenderer(new JRowHeader());//Makeshift "rowHeader"
    table.setRowHeight(30);
    table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
    table.setBackground(Color.LIGHT_GRAY);



    JScrollPane scrollPane = new JScrollPane(table);
    //scrollPane.setBackground(Color.BLUE);
    springLayout.putConstraint(SpringLayout.WEST, scrollPane, 180, SpringLayout.WEST, this);
    springLayout.putConstraint(SpringLayout.NORTH, lblCumGPA, 30, SpringLayout.NORTH, scrollPane);
    springLayout.putConstraint(SpringLayout.EAST, comboBoxSemester, -15, SpringLayout.WEST, scrollPane);
    springLayout.putConstraint(SpringLayout.EAST, lblCumGPA, -15, SpringLayout.WEST, scrollPane);
    springLayout.putConstraint(SpringLayout.EAST, lblSemGPA, -15, SpringLayout.WEST, scrollPane);
    springLayout.putConstraint(SpringLayout.SOUTH, btnRemoveSemester, 0, SpringLayout.SOUTH, scrollPane);
    springLayout.putConstraint(SpringLayout.EAST, scrollPane, -15, SpringLayout.EAST, this);
    springLayout.putConstraint(SpringLayout.NORTH, scrollPane, 15, SpringLayout.NORTH, this);
    springLayout.putConstraint(SpringLayout.SOUTH, scrollPane, -15, SpringLayout.SOUTH, this);

    add(scrollPane);

    table.setFillsViewportHeight(true);

在这里，您可以看到，我用我的SemesterTableModel初始化了我的Jtable，并将我的3个向量作为SemesterTableModel的参数传递。然后传递到下面：

public class SemesterTableModel extends AbstractTableModel {

private Vector<String> colNames, rowNames;
private Vector<Vector<String>> data;

public SemesterTableModel() {
    colNames = new Vector<String>(1);
    rowNames = new Vector<String>(1);
    data = new Vector<Vector<String>>(1,1);
}

public SemesterTableModel(Vector<String> colNames, Vector<String> rowNames, Vector<Vector<String>> data){
    this.colNames = colNames;
    this.rowNames = rowNames;
    this.data = data;
}

@Override
public int getColumnCount() {
    return colNames.size();
}

@Override
public int getRowCount() {
    return rowNames.size();
}

@Override
public Object getValueAt(int col, int row) {
    if(col == 0)
        return rowNames.elementAt(row);
    else if(col >=5 || row >=5) //This is the code I added to figure out where my data was going, before I added this else if statement I was getting the array-index out of bounds errors
        return "Out of Bounds";
    else
        return data.elementAt(row).elementAt(col);
}

@Override
public boolean isCellEditable(int row, int col){
    if(col == 0 || row < 5){ //5 is an arbitrary number, I really want this to be an arbitrary variable that will be dependent on another class I haven't finished yet.
        return false;
    }
    return true;
}

}

当然，我希望“testdata”位于“行标题”和列标题之间，“testrownames”仅位于第一列，然后还有“testcolnames”甚至不显示（不过如果我没记错的话，我需要通过Jtable本身而不是TableModel更改列标题）。

很明显，我不明白这里的一些东西，我一直在用我的头撞键盘一段时间，现在试图弄清楚这一点。如果你们知道发生了什么或者有什么建议，我会洗耳恭听的。

Answer 1

tablemodel#getvalueat应该是int行，int行而不是int行，int行...

public Object getValueAt(int row, int col) {

您必须移除“越界”检查以使其完全工作...因为有超过5行

请仔细研究如何使用滚动窗格，以了解如何在不需要伪造的情况下实现自己的行标头...