javax.swing.JFileChooser#setVisible ( )源码实例Demo

private Optional<String> saveAsFile() {
  JFileChooser chooser = new JFileChooser();
  chooser.setDialogTitle("Save as ");

  //按默认方式显示
  chooser.showSaveDialog(null);
  chooser.setVisible(true);

  //得到用户希望把文件保存到何处
  File file = chooser.getSelectedFile();
  if (Objects.isNull(file)) {
    log.warn("please select file: chooser={}", chooser);
    return Optional.empty();
  }

  //准备写入到指定目录下
  String path = file.getAbsolutePath();
  try (BufferedWriter bw = new BufferedWriter(new FileWriter(path))) {
    bw.write(Note.textArea.getText());
  } catch (Exception e) {
    log.error(e.getMessage(), e);
  }
  return Optional.of(path);
}
 

/**
 * Opens the file chooser for loading the current configuration file.
 */
public void load() {
	JFileChooser fc = fileChooser.get();
	fc.setFileFilter(null);
	fc.setVisible(true);
	fc.setCurrentDirectory(getFile());

	int returnVal = fc.showDialog(null, "Load");

	if (returnVal == JFileChooser.APPROVE_OPTION) {
		load(fc.getSelectedFile());
	}
}
 

/**
 * Opens the file chooser for saving the current configuration file.
 */
public void saveAs() {
	JFileChooser fc = fileChooser.get();
	fc.setFileFilter(null);
	fc.setVisible(true);
	fc.setCurrentDirectory(getFile());

	int returnVal = fc.showDialog(null, "Save");

	if (returnVal == JFileChooser.APPROVE_OPTION) {
		save(fc.getSelectedFile());
	}
}
 

private void outputFormatComboBoxItemStateChanged(java.awt.event.ItemEvent evt) {//GEN-FIRST:event_outputFormatComboBoxItemStateChanged

    if (((String) outputFormatComboBox.getSelectedItem()).equals("PropertyList to Keel") || ((String) outputFormatComboBox.getSelectedItem()).equals("Weka to Keel") || ((String) outputFormatComboBox.getSelectedItem()).equals("Keel to Keel")) {
        optionsButton.setEnabled(false);
    } else {
        optionsButton.setEnabled(true);
    }

    if (((String) outputFormatComboBox.getSelectedItem()).equals("CSV to Keel") || ((String) outputFormatComboBox.getSelectedItem()).equals("TXT to Keel") || ((String) outputFormatComboBox.getSelectedItem()).equals("PRN to Keel") || ((String) outputFormatComboBox.getSelectedItem()).equals("Excel to Keel") || ((String) outputFormatComboBox.getSelectedItem()).equals("HTML Tab to Keel")) {
        processHeaderCheckBox.setEnabled(true);
    } else {
        processHeaderCheckBox.setEnabled(false);
    }

    setExtensionAndDescription();
    JFileChooser chooser = fileBrowserPanel.getFileChooser();
    chooser.resetChoosableFileFilters();
    if (ext.equals("DISABLE")) {
        chooser.setFileFilter(null);
        chooser.setVisible(false);
    } else {
        KeelFileFilter fileFilter = new KeelFileFilter();
        fileFilter.addExtension(ext);
        fileFilter.setFilterName(desc);
        chooser.setFileFilter(fileFilter);
        chooser.setVisible(true);
        //fileBrowserPanel.repaint();
    }

    importOptionsDialog = createNewOptionsDialog(((String) outputFormatComboBox.getSelectedItem()));

}