Java：JTable中的控制台输出
该程序应列出JTable中的卷。
例如：我从vollist.java类获得此输出。
while (volumeIter.hasNext()) { volume = volumeIter.next(); System.out.println(volume.getName()); }
控制台输出：
vol1 vol2 vol3 ...
如何在JTable获得此控制台输出。
table = new JTable(); table.setModel(new DefaultTableModel( new Object[][] { {null, vollist.volname(null), null, null, null}, {null, vollist.volname(null), null, null, null}, {null, vollist.volname(null), null, null, null}, }, new String[] { "Nr:", "Volume Name", "TotalSize [MB]", "Used [MB]", "Status" } ));
那只显示row1 – > vol1 row2 – > vol1 ……我怎样才能获得类似控制台中的输出row1 – > vol1 row2 – > vol2（count up）
定义并实现您的TableModel（在这种情况下扩展AbstractTableModel）
这是更广泛但是OOP强类型。
class VolumeTableModel extends AbstractTableModel { private String[] columnNames = {"Nr:", "Volume Name", "TotalSize [MB]", "Used [MB]", "Status"}; private ArrayList volumes; public VolumeTableModel(ArrayList volumes) { this.volumes = volumes; } public VolumeTableModel() { volumes = new ArrayList (); } public void addVolume(Volume volume) { volumes.add(volume); fireTableRowsInserted(volumes.size()-1, volumes.size()-1); } public int getColumnCount() { return columnNames.length; } public int getRowCount() { return volumes.size(); } public String getColumnName(int col) { return columnNames[col]; } public Object getValueAt(int row, int col) { Volume volume = volumes.get(row); switch (col) { case 0: return volume.number; case 1: return volume.name; case 2: return volume.totalSize; case 3: return volume.usedSize; case 4: return volume.status; default: return null; } } public Class getColumnClass(int col) { return String.class; //or just as example switch (col) { case 0: return Integer.class; case 1: return String.class; case 2: return Integer.class; case 3: return Integer.class; case 4: return String.class; default: return String.class; } } }
并将其指定为表的TableModel
//if you have the Volume ArrayList VolumeTableModel myTableModel = new VolumeTableModel(volumesArrayList); //if you dont have the Volume ArrayList VolumeTableModel myTableModel = new VolumeTableModel(); myTableModel.addVolume(volume); JTable table = new JTable(myTableModel);
来自http://docs.oracle.com/javase/tutorial/uiswing/components/table.html#data的一些消息来源
基本上，你需要相互调整两段代码……
DefaultTableModel model = new DefaultTableModel(new String[] { "Nr:", "Volume Name", "TotalSize [MB]", "Used [MB]", "Status"}, 0); while (volumeIter.hasNext()) { volume = volumeIter.next(); model.addRow(new Object[] { {null, vollist.volname(), null, null, null}); } table = new JTable(model);
看看帽子如何使用表格了解更多细节
更新
更好的想法是允许TableModel实际“模拟”提供的数据自己，例如……
public class FileSystemTabelModel extends AbstractTableModel { private static final String[] COLUMN_NAMES = new String[]{"Nr:", "Volume Name", "TotalSize [MB]", "Used [MB]", "Status"}; private File[] roots; public FileSystemTabelModel() { roots = File.listRoots(); } @Override public int getRowCount() { return roots.length; } @Override public int getColumnCount() { return COLUMN_NAMES.length; } @Override public String getColumnName(int column) { return COLUMN_NAMES[column]; } @Override public Object getValueAt(int rowIndex, int columnIndex) { File root = roots[rowIndex]; Object result = null; switch (columnIndex) { case 0: result = rowIndex; break; case 1: result = root.getName(); break; case 3: result = root.getTotalSpace(); break; case 4: result = root.getTotalSpace() - root.getFreeSpace(); break; case 5: result = "All Good"; break; } return result; } }
然后你需要的只是……
table = new JTable(new FileSystemTabelModel());
这更多的是如何使用表模型 – 恕我直言