使用.将文本拟合到JTextField

Question

我有一个JTextField textField,我有一个任意的String string

我希望文本字段显示字符串的结尾,但切断它不适合的内容并使用"..."代替它.例如,如果字符串是,"Hello How Are You Doing"那么文本字段可能看起来像

...re You Doing

鉴于textfield和string,我该怎么做？

更新:我想这样做的原因是因为它是一个文件选择器,所以我想优先显示文件的结尾.例如,如果用户选择保存在/Users/Name/Documents/Folder1/Folder2/Folder3/file.txt,那么我想显示结束,其余不适合的应该替换为"..."

这是它的地方:

JFileChooser chooser = new JFileChooser();
int response = chooser.showSaveDialog(this);
if(response == JFileChooser.APPROVE_OPTION) {
    File file = chooser.getSelectedFile();
    String string = file.getAbsolutePath();

    fileTextField.setText(/* here's where the code would go */);
}

Answer 1

..it是一个文件选择器,所以我想优先显示文件的结尾.

我建议将此作为替代方案,或者在文件名后删除工具提示(路径).

import java.awt.*;
import javax.swing.*;
import javax.swing.filechooser.FileSystemView;
import java.io.File;

class FileListName {

    final class FileListCellRenderer extends DefaultListCellRenderer {

        private FileSystemView fsv = FileSystemView.getFileSystemView();

        @Override
        public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
            Component c = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
            JLabel l = (JLabel) c;
            File f = (File) value;
            l.setText(f.getName());
            l.setIcon(fsv.getSystemIcon(f));
            l.setToolTipText(f.getAbsolutePath());

            return l;
        }
    }

    public FileListName() {
        JFileChooser jfc = new JFileChooser();
        jfc.showOpenDialog(null);
        if (jfc.getSelectedFile() != null) {
            File[] f = {jfc.getSelectedFile()};
            JList list = new JList(f);
            list.setVisibleRowCount(1);
            list.setCellRenderer(new FileListCellRenderer());
            JOptionPane.showMessageDialog(null, list);
        }
    }

    public static void main(String[] args) {
        Runnable r = new Runnable() {

            @Override
            public void run() {
                try {
                    // Provides better icons from the FSV.
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (Exception useDefault) {
                }
                new FileListName();
            }
        };
        // Swing GUIs should be created and updated on the EDT
        // http://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html
        SwingUtilities.invokeLater(r);
    }
}