获取触发 RowSorterEvent 的列
Get column which fires RowSorterEvent
我有一个 RowSorterListener。我想知道哪个列触发了 RowSorterEvent
。但是,当我尝试获取该列时,我没有得到我想要的输出。
public class CustomRowSorterListener implements RowSorterListener {
JTable table;
public CustomRowSorterListener(JTable table) {
this.table = table;
}
@Override
public void sorterChanged(RowSorterEvent e)
{
//Attempt 1
System.out.println(e.getSource()); //Returns RowSorter and not a column
//Attempt 2
System.out.println(e.getSource().getColumn()); //Caused error in code
//Attempt 3
System.out.println(table.getColumn()) //Didn't work because no arguments were
//provided. However, I was unsure if it could
//be done this way.
//System.out.println(table.getColumn(e.getSource())) also doesn't work
}
}
如果能帮助我找到有效的解决方案,我将不胜感激。
I would like to be able to tell which column fires the RowSorterEvent.
从 SortKey
开始。它可以 return getColumn
。例如:
Column NO. - 0 is sorted
Column NO. - 0 is sorted
Column NO. - 0 is sorted
Column NO. - 1 is sorted
Column NO. - 1 is sorted
BUILD SUCCESSFUL (total time: 9 seconds)
import java.awt.EventQueue;
import java.util.List;
import javax.swing.*;
import javax.swing.RowSorter.SortKey;
import javax.swing.event.*;
import javax.swing.table.*;
public class SortTest {
private JFrame frame = new JFrame(getClass().getSimpleName());
private DefaultTableModel model = new DefaultTableModel(10, 2) {
private static final long serialVersionUID = 1L;
@Override
public Class<?> getColumnClass(int column) {
return column == 1 ? Integer.class : Object.class;
}
};
private JTable table = new JTable(model);
public SortTest() {
for (int row = model.getRowCount(); --row >= 0;) {
int i = 20 + row % 20;
model.setValueAt(row + " " + i, row, 0);
model.setValueAt(i + row, row, 1);
}
table.setAutoCreateRowSorter(true);
TableRowSorter<?> sorter = (TableRowSorter<?>) table.getRowSorter();
sorter.setSortsOnUpdates(true);
sorter.addRowSorterListener(new RowSorterListener() {
@Override
public void sorterChanged(RowSorterEvent rse) {
if (rse.getType() == RowSorterEvent.Type.SORT_ORDER_CHANGED) {
List<SortKey> keys = rse.getSource().getSortKeys();
for (SortKey key : keys) {
System.out.println("Column NO. - " + key.getColumn() + " is sorted");
if (key.getColumn() == 0) {
break;
} else {
break;
}
}
}
}
});
frame.add(new JScrollPane(table));
table.setPreferredScrollableViewportSize(table.getPreferredSize());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(() -> {
new SortTest();
});
}
}
我有一个 RowSorterListener。我想知道哪个列触发了 RowSorterEvent
。但是,当我尝试获取该列时,我没有得到我想要的输出。
public class CustomRowSorterListener implements RowSorterListener {
JTable table;
public CustomRowSorterListener(JTable table) {
this.table = table;
}
@Override
public void sorterChanged(RowSorterEvent e)
{
//Attempt 1
System.out.println(e.getSource()); //Returns RowSorter and not a column
//Attempt 2
System.out.println(e.getSource().getColumn()); //Caused error in code
//Attempt 3
System.out.println(table.getColumn()) //Didn't work because no arguments were
//provided. However, I was unsure if it could
//be done this way.
//System.out.println(table.getColumn(e.getSource())) also doesn't work
}
}
如果能帮助我找到有效的解决方案,我将不胜感激。
I would like to be able to tell which column fires the RowSorterEvent.
从 SortKey
开始。它可以 return getColumn
。例如:
Column NO. - 0 is sorted
Column NO. - 0 is sorted
Column NO. - 0 is sorted
Column NO. - 1 is sorted
Column NO. - 1 is sorted
BUILD SUCCESSFUL (total time: 9 seconds)
import java.awt.EventQueue;
import java.util.List;
import javax.swing.*;
import javax.swing.RowSorter.SortKey;
import javax.swing.event.*;
import javax.swing.table.*;
public class SortTest {
private JFrame frame = new JFrame(getClass().getSimpleName());
private DefaultTableModel model = new DefaultTableModel(10, 2) {
private static final long serialVersionUID = 1L;
@Override
public Class<?> getColumnClass(int column) {
return column == 1 ? Integer.class : Object.class;
}
};
private JTable table = new JTable(model);
public SortTest() {
for (int row = model.getRowCount(); --row >= 0;) {
int i = 20 + row % 20;
model.setValueAt(row + " " + i, row, 0);
model.setValueAt(i + row, row, 1);
}
table.setAutoCreateRowSorter(true);
TableRowSorter<?> sorter = (TableRowSorter<?>) table.getRowSorter();
sorter.setSortsOnUpdates(true);
sorter.addRowSorterListener(new RowSorterListener() {
@Override
public void sorterChanged(RowSorterEvent rse) {
if (rse.getType() == RowSorterEvent.Type.SORT_ORDER_CHANGED) {
List<SortKey> keys = rse.getSource().getSortKeys();
for (SortKey key : keys) {
System.out.println("Column NO. - " + key.getColumn() + " is sorted");
if (key.getColumn() == 0) {
break;
} else {
break;
}
}
}
}
});
frame.add(new JScrollPane(table));
table.setPreferredScrollableViewportSize(table.getPreferredSize());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(() -> {
new SortTest();
});
}
}