我正在尝试使用
我很确定我可以通过执行
编辑：恢复到单个代码中，以便更容易复制/粘贴：
JTables 来编写自定义文件导航器，以便浏览文件系统。我遇到的问题是，只要你持续按住鼠标按钮，鼠标事件就会一直进行。因此，如果有人试图通过不断双击“上一级”字段（因为它不会移动）来向上多级跳转，除非他们停止点击一段时间，否则它只会返回到一个目录。因此，我意识到这个问题的原因是由于 MouseEvent 仍然处于活动状态。我很确定我可以通过执行
if(e.getClickCount() % 2 == 0) 来实现我想要的功能，但这感觉像是一种错误的解决方法。是否有更好/更正确的方法来解决这个问题，例如在初始双击后重置 MouseEvent？是否有可能手动重置 MouseEvent？如果可以，怎么做？编辑：恢复到单个代码中，以便更容易复制/粘贴：
package main;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.filechooser.FileSystemView;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumnModel;
public class Main {
public static void main(String[] args) {
new CreateFrame();
}
}
class CreateFrame extends JFrame {
public CreateFrame() {
setPreferredSize(new Dimension(800, 600));
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (UnsupportedLookAndFeelException e) {
e.printStackTrace();
}
setContentPane(new LocalNavigator());
pack();
setVisible(true);
}
class LocalTable extends JTable {
private DefaultTableModel dtm;
private File path;
private FileSystemView fsv = FileSystemView.getFileSystemView();
public LocalTable() {
String[] header = new String[] { "Icon", "File/Folder Name", "File Type" };
dtm = new DefaultTableModel() {
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
@Override
public Class<?> getColumnClass(int column) {
if (getRowCount() > 0) {
return getValueAt(0, column).getClass();
}
return super.getColumnClass(column);
}
};
dtm.setColumnIdentifiers(header);
setAutoCreateRowSorter(true);
setRowHeight(25);
setModel(dtm);
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
JTable table = (JTable) e.getSource();
Point p = e.getPoint();
int row = table.rowAtPoint(p);
String type = getValueAt(row, 2).toString().toLowerCase();
if (type.contains("root") || type.contains("folder")) {
File file = new File((path != null ? path + "/" + getValueAt(row, 1) : getValueAt(row, 1).toString()));
if (file != null)
repopulateFileFolderList(file);
} else if (getValueAt(row, 1).toString().toLowerCase().contains("up one")
&& getValueAt(row, 2).toString().equals("")) {
File file = path.getParentFile();
if (file != null)
repopulateFileFolderList(file);
else
getTableRoot();
} else {
System.out.println("Not a directory!");
}
}
}
});
}
public void getTableRoot() {
path = null;
while (dtm.getRowCount() > 0) {
dtm.removeRow(0);
}
File[] roots = File.listRoots();
for (File root : roots) {
dtm.addRow(new Object[] { fsv.getSystemIcon(root), root.getAbsoluteFile(), "Root Directory" });
}
}
private void repopulateFileFolderList(File folder) {
path = folder;
while (dtm.getRowCount() > 0) {
dtm.removeRow(0);
}
dtm.addRow(new Object[] { fsv.getSystemIcon(folder), "Up One Level", "" });
File[] files = folder.listFiles();
for (File file : files) {
dtm.addRow(new Object[] { fsv.getSystemIcon(file), file.getName(),
(file.isDirectory() ? "Folder" : file.isFile() ? "File" : "Unknown") });
}
}
}
class LocalNavigator extends JPanel {
private LocalTable localTable;
public LocalNavigator() {
setLayout(new BorderLayout());
localTable = new LocalTable();
localTable.getTableRoot();
JScrollPane lTree = new JScrollPane(localTable);
add(lTree, "Center");
TableColumnModel columns = localTable.getColumnModel();
for (int c = 0;c < columns.getColumnCount();c++) {
if (c == 0)
columns.getColumn(c).setMaxWidth(25);
else
columns.getColumn(c).setPreferredWidth(50);
}
}
}
}