Question

我将尝试尽可能详尽地解释我想要做的事情，因为我在UI上非常新。我有一个字符串列表，我们称之为user_decide，它包含不同数量的元素。例如

1st Row [192, 495, 393, 399]
2nd Row [384, 493, 945, 559, 485]

这些数字代表某些数组的索引，例如

Name[192] = "John", Name[495] = "Mary" 
Surname[192] = "Pap", Surname[495] = "Black"

我正在尝试创建一个具有上一个和下一个按钮的UI，以及一个JTable。

第一次，我的用户界面将显示

1st Column 2nd Column 3rd Column 4th Column 5th Column
Name       John       Mary       etc..
Surname    Pap        Black

当我按下Next时，它将显示下一行：

1st Column 2nd Column    3rd Column    4th Column    5th Column 6th Column
Name       Name[384]     Name[493]     Name[945]     etc... 
Surname    Surname[384]  Surname[493]  Surname[945]

到目前为止，我所做的是一个包含大量JTable的框架。

JPanel panel = new JPanel();
int cols = 0;
Iterator<String> iterator = user_decide.iterator();
while (iterator.hasNext())
    {
        String con = iterator.next();
        con = con.replaceAll("\\s", "").replaceAll("\\[", "").replaceAll("\\]", "");
        String conv [] = con.split("\\,");
        // It can be used for the "for-statement"
        cols = conv.length;

        List<String> column = new ArrayList<String>();
        // Giving the name of the columns
        for(int i = 0; i < cols + 1; i ++)
        {
            if (i == 0) column.add("");
            else column.add("Column #" + i);    
        }
        // Setting the jtable with a specific number of columns
        String[] column_names = column.toArray(new String[column.size()]);
        tableModel = new DefaultTableModel( 17, cols);
        tableModel.setColumnIdentifiers(column_names);
            JTable table = new JTable(tableModel);
            // HERE I AM GOING TO PLACE MY DATA AFTERWARDS
            SetData(table, "Name",0,0);
            SetData(table, "Surname",1,0);


                panel.add(new JScrollPane(table,
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS));
                }
    JFrame frame = new JFrame("Results");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setBounds(200, 200, 600, 400);
    frame.add(new JScrollPane(panel,
            JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
            JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS));

    frame.add(panel, BorderLayout.CENTER);
    frame.setVisible(true);
}

public void SetData(JTable table, Object obj, int row_index, int col_index){
      table.getModel().setValueAt(obj,row_index,col_index);
      }

当我尝试使用一个可以存储所有数据的表时，我有了这个下一个按钮。

JPanel navigation = new JPanel(
new FlowLayout(FlowLayout.CENTER));
JButton next = new JButton("NEXT");
next.addActionListener( new ActionListener(){
        public void actionPerformed(ActionEvent ae) {
        int height = table.getRowHeight()*(rows-1);
        JScrollBar bar = scrollPane.getVerticalScrollBar();
        bar.setValue( bar.getValue()+height );
        }
} );

我将不胜感激任何帮助。非常感谢你阅读本文。

Answer 1

public class SwitchTableModel extends AbstractTableModel {
    private final String [] name = new String [] {"Alice", "Bob", "John", "Mary"};
    private final String [] surname = new String [] {"Green", "Red", "Brown", "Grey"};

    private final int [][] data = new int [][] {
        new int [] {1, 3, 2},
        new int [] {0, 2, 1, 3},
        new int [] {0, 3},
        new int [] {0, 1, 2, 3}
    };

    private int position = 0;

    @Override
    public int getRowCount() {
        return 2;
    }

    @Override
    public int getColumnCount() {
        return data [position].length + 1;
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        switch (rowIndex)
        {
        case 0:
            return columnIndex == 0 ? "Name" : name [data [position][columnIndex - 1]];
        case 1:
            return columnIndex == 0 ? "Surname" : surname [data [position][columnIndex - 1]];
        default:
            throw new Error ();
        }
    }

    public void previous ()
    {
        position -= 1;
        if (position < 0) position = data.length - 1;

        fireTableStructureChanged();
    }

    public void next ()
    {
        position += 1;
        if (position >= data.length) position = 0;

        fireTableStructureChanged();
    }

    public static void main(String[] args) {
        final SwitchTableModel model = new SwitchTableModel();

        Box toolbar = Box.createHorizontalBox();
        toolbar.add (new JButton (new AbstractAction("Previous") {
            @Override
            public void actionPerformed(ActionEvent e) {
                model.previous ();
            }
        }));
        toolbar.add (Box.createHorizontalGlue());
        toolbar.add (new JButton (new AbstractAction("Next") {

            @Override
            public void actionPerformed(ActionEvent e) {
                model.next ();
            }
        }));

        JTable table = new JTable(model);

        JFrame frame = new JFrame ();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(new BorderLayout());
        frame.getContentPane().add (toolbar, BorderLayout.NORTH);
        frame.getContentPane().add (
            new JScrollPane(
                table, 
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, 
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED),    
            BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
    }
}

在JTable中显示List的下一行

1 个答案: