Java 无法将列宽设置为零,即未使列不可见
我试图从Java 无法将列宽设置为零,即未使列不可见,java,swing,jtable,tablecolumn,Java,Swing,Jtable,Tablecolumn,我试图从JTable中创建一列,通过将width设置为零使其不可见,但它无法发生,并且在width=15时保持可见。这是代码- public void restoreColumnWithWidth(int column, int width) { try { TableColumn tableColumn = table.getColumnModel().getColumn(column); table.getTableHeader
JTable
中创建一列,通过将width设置为零使其不可见,但它无法发生,并且在width=15时保持可见。这是代码-
public void restoreColumnWithWidth(int column, int width) {
try {
TableColumn tableColumn = table.getColumnModel().getColumn(column);
table.getTableHeader().setResizingColumn(tableColumn);
tableColumn.setWidth(width);
tableColumn.setMaxWidth(width);
tableColumn.setMinWidth(width);
tableColumn.setPreferredWidth(width);
} catch (Exception ex) {
}
}
代码有什么问题?如果应该删除它,而不仅仅是隐藏:将其从表模型中删除。 如果只应将其隐藏并在以后显示,则可以从TableColumnModel中删除TableColumn 将列高度设为0有点假。
- 不,永远不要从
中删除TableModel
,这是错误的建议,而不是使用内置方法TableColumn
- 请注意,此方法仅从视图中移除列,在模型中,移除的列仍然存在,并且您可以通过使用将其还原为可见的移除列
谢谢mKorbel先生,但是你能看看我的代码吗。这有什么不对吗?将宽度设置为零必须有效。@Ashish Pancholi请查看我的编辑,我们讨论过相同的内容吗:-)谢谢mKorbel先生。在看到示例代码之后,现在就清楚了。案件已解决。@Ashish Pancholi不客气,很高兴为您提供+1的好线索
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Stack;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.WindowConstants;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
public class TableRowHeight {
private static final long serialVersionUID = 1L;
private JFrame frame = new JFrame("p*s*s*s*s*t*t");
private String[] columnNames = {"one", "two", "Playing with", "four", "five",};
private String[][] data = {
{"aaaaaa", "bbbbbb", "cccccc", "dddddd", "eeeeeee",},
{"bbbbbb", "cccccc", "dddddd", "eeeeeee", "aaaaaa",},
{"cccccc", "dddddd", "eeeeeee", "aaaaaa", "bbbbbb",},
{"dddddd", "eeeeeee", "aaaaaa", "bbbbbb", "cccccc",},
{"eeeeeee", "aaaaaa", "bbbbbb", "cccccc", "dddddd",}};
private JTable table = new JTable(new DefaultTableModel(data, columnNames));
private TableColumnModel tcm = table.getColumnModel();
private Stack<TableColumn> colDeleted = new Stack<TableColumn>();
private JButton restoreButton = new JButton("Restore Column Size");
private JButton hideButton = new JButton("Set Column Size to Zero");
private JButton deleteButton = new JButton("Delete Column");
private JButton addButton = new JButton("Restore Column");
public TableRowHeight() {
table.setRowMargin(4);
table.setRowHeight(30);
table.setFont(new Font("SansSerif", Font.BOLD + Font.PLAIN, 20));
JScrollPane scrollPane = new JScrollPane(table);
for (int i = 0; i < (tcm.getColumnCount()); i++) {
tcm.getColumn(i).setPreferredWidth(100);
}
table.setPreferredScrollableViewportSize(table.getPreferredSize());
restoreButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
tcm.getColumn(2).setPreferredWidth(100);
}
});
hideButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
tcm.getColumn(2).setPreferredWidth(000);
}
});
deleteButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (table.getColumnCount() > 0) {
TableColumn colToDelete = table.getColumnModel().getColumn(table.getColumnCount() - 1);
table.removeColumn(colToDelete);
table.validate();
colDeleted.push(colToDelete);
addButton.setEnabled(true);
} else {
deleteButton.setEnabled(false);
}
}
});
addButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (colDeleted.size() > 0) {
table.addColumn(colDeleted.pop());
table.validate();
deleteButton.setEnabled(true);
} else {
addButton.setEnabled(false);
}
}
});
JPanel btnPanel = new JPanel();
btnPanel.add(hideButton);
btnPanel.add(restoreButton);
btnPanel.add(deleteButton);
btnPanel.add(addButton);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.add(scrollPane, BorderLayout.CENTER);
frame.add(btnPanel, BorderLayout.SOUTH);
frame.pack();
frame.setLocation(150, 150);
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
TableRowHeight frame = new TableRowHeight();
}
});
}
}
JTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JTable.getTableHeader().setReorderingAllowed(false);