filechoosertest.java

来自「Thinking in JAVA第四版源代码」· Java 代码 · 共 64 行

//: gui/FileChooserTest.java
// Demonstration of File dialog boxes.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import static net.mindview.util.SwingConsole.*;

public class FileChooserTest extends JFrame {
  private JTextField
    fileName = new JTextField(),
    dir = new JTextField();
  private JButton
    open = new JButton("Open"),
    save = new JButton("Save");
  public FileChooserTest() {
    JPanel p = new JPanel();
    open.addActionListener(new OpenL());
    p.add(open);
    save.addActionListener(new SaveL());
    p.add(save);
    add(p, BorderLayout.SOUTH);
    dir.setEditable(false);
    fileName.setEditable(false);
    p = new JPanel();
    p.setLayout(new GridLayout(2,1));
    p.add(fileName);
    p.add(dir);
    add(p, BorderLayout.NORTH);
  }
  class OpenL implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      JFileChooser c = new JFileChooser();
      // Demonstrate "Open" dialog:
      int rVal = c.showOpenDialog(FileChooserTest.this);
      if(rVal == JFileChooser.APPROVE_OPTION) {
        fileName.setText(c.getSelectedFile().getName());
        dir.setText(c.getCurrentDirectory().toString());
      }
      if(rVal == JFileChooser.CANCEL_OPTION) {
        fileName.setText("You pressed cancel");
        dir.setText("");
      }
    }
  }
  class SaveL implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      JFileChooser c = new JFileChooser();
      // Demonstrate "Save" dialog:
      int rVal = c.showSaveDialog(FileChooserTest.this);
      if(rVal == JFileChooser.APPROVE_OPTION) {
        fileName.setText(c.getSelectedFile().getName());
        dir.setText(c.getCurrentDirectory().toString());
      }
      if(rVal == JFileChooser.CANCEL_OPTION) {
        fileName.setText("You pressed cancel");
        dir.setText("");
      }
    }
  }
  public static void main(String[] args) {
    run(new FileChooserTest(), 250, 150);
  }
} ///:~