ファイルチューザ

ファイル選択ダイアログ

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--javax.swing.JComponent
                    |
                    +--javax.swing.JFileChooser

public class JFileChooser
	extends JComponent implements Accessible

public int showOpenDialog(
	Component parent
) throws HeadlessException
public int showSaveDialog(
	Component parent
) throws HeadlessException
public int showDialog(
	Component parent , String approveButtonText
) throws HeadlessException

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Test {
	public static void main(String args[]) {
		JFrame frame = new JFrame("Kitty on your lap");
		frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		frame.addWindowListener(new WindowAdapter() {
			public void windowClosed(WindowEvent e) {
				System.exit(0);
			}
		});

		JFileChooser file = new JFileChooser();
		if (file.showOpenDialog(frame) == JFileChooser.CANCEL_OPTION)
			System.exit(0);

		Icon icon = new ImageIcon(file.getSelectedFile().getPath());
		frame.getContentPane().add(new JScrollPane(new JLabel(icon)));

		frame.setSize(400 , 400);
		frame.setVisible(true);
	}
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.beans.*;

public class Test extends JFrame implements PropertyChangeListener {
	public static void main(String args[]) {
		JFrame frame = new Test();
		frame.setSize(400 , 400);
		frame.setVisible(true);
	}

	JLabel label = new JLabel();
	JFileChooser fcsr = new JFileChooser();
	public Test() {
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		addWindowListener(new WindowAdapter() {
			public void windowClosed(WindowEvent e) {
				System.exit(0);
			}
		});

		JScrollPane scroll = new JScrollPane(label);
		scroll.setPreferredSize(new Dimension(200 , 0));
		fcsr.setAccessory(scroll);
		fcsr.addPropertyChangeListener(this);

		fcsr.showOpenDialog(this);
	}

	public void propertyChange(PropertyChangeEvent e) {
		java.io.File file = fcsr.getSelectedFile();
		if (file == null) return;
		label.setIcon(new ImageIcon(file.getPath()));
	}
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Test extends JFrame {
	public static void main(String args[]) {
		JFrame frame = new Test();
	}

	JFileChooser fcsr = new JFileChooser();
	public Test() {
		FileFilterEx filter[] = {
			new FileFilterEx(".jpg" , "JPEG ファイル(*.jpg)") ,
			new FileFilterEx(".gif" , "GIF ファイル(*.gif)") ,
			new FileFilterEx(".txt" , "テキストファイル(*.txt)")
		};
		for(int i = 0 ; i < filter.length ; i++)
			fcsr.addChoosableFileFilter(filter[i]);
		fcsr.showOpenDialog(this);
		System.exit(0);
	}
}

class FileFilterEx extends javax.swing.filechooser.FileFilter {
	private String extension , msg;
	public FileFilterEx(String extension , String msg) {
		this.extension = extension;
		this.msg = msg;
	}
	public boolean accept(java.io.File f) {
		return f.getName().endsWith(extension);
	}
	public String getDescription() { return msg; }
}

import java.awt.*;
import javax.swing.*;

public class Test extends JFrame {
	public static void main(String args[]) {
		JFrame frame = new Test();
	}

	JFileChooser fcsr = new JFileChooser();
	public Test() {
		fcsr.setMultiSelectionEnabled(true);
		fcsr.showOpenDialog(this);
		JOptionPane.showMessageDialog(this , fcsr.getSelectedFiles());

		System.exit(0);
	}
}

import java.awt.*;
import java.io.*;
import javax.swing.*;

public class Test extends JFrame {
	public static void main(String args[]) {
		JFrame frame = new Test();
	}

	JFileChooser fcsr = new JFileChooser();
	public Test() {
		fcsr.setFileView(new IconFileView(".wis" , new ImageIcon("icon.jpg")));
		fcsr.showOpenDialog(this);
		System.exit(0);
	}
}

class IconFileView extends javax.swing.filechooser.FileView {
	String extension;
	Icon icon;

	public IconFileView(String extension , Icon icon) {
		this.extension = extension;
		this.icon = icon;
	}
	public Icon getIcon(File f) {
		if (f.getName().endsWith(extension)) return icon;
		else return null;
	}
}