DisplayFile.java
****************
import java.awt.*;
import java.awt.event.*;
import java.io.*;
/** Uses a FileDialog to choose the file to display.
***************
public class DisplayFile extends CloseableFrame
implements ActionListener {
public static void main(String[] args) {
new DisplayFile();
}
private Button loadButton;
private TextArea fileArea;
private FileDialog loader;
public DisplayFile() {
super("Using FileDialog");
loadButton = new Button("Display File");
loadButton.addActionListener(this);
Panel buttonPanel = new Panel();
buttonPanel.add(loadButton);
add(buttonPanel, BorderLayout.SOUTH);
fileArea = new TextArea();
add("Center", fileArea);
loader = new FileDialog(this, "Browse", FileDialog.LOAD);
// Default file extension: .java.
loader.setFile("*.java");
setSize(350, 450);
setVisible(true);
}
/** When the button is clicked, a file dialog is opened. When
* the file dialog is closed, load the file it referenced.
*/
public void actionPerformed(ActionEvent event) {
loader.show();
displayFile(loader.getFile());
}
public void displayFile(String filename) {
try {
File file = new File(filename);
FileInputStream in = new FileInputStream(file);
int fileLength = (int)file.length();
byte[] fileContents = new byte[fileLength];
in.read(fileContents);
String fileContentsString = new String(fileContents);
fileArea.setText(fileContentsString);
} catch(IOException ioe) {
fileArea.setText("IOError: " + ioe);
}
}
}
*************
CloseableFrame.java.
*************
import java.awt.*;
import java.awt.event.*;
/** A Frame that you can actually quit. Used as the starting
* point for most Java 1.1 graphical applications.
**********************
public class CloseableFrame extends Frame {
public CloseableFrame(String title) {
super(title);
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
}
/** Since we are doing something permanent, we need
* to call super.processWindowEvent first.
*/
public void processWindowEvent(WindowEvent event) {
super.processWindowEvent(event); // Handle listeners.
if (event.getID() == WindowEvent.WINDOW_CLOSING) {
// If the frame is used in an applet, use dispose().
System.exit(0);
}
}
}
Note: Brought from our old site: http://www.salearningschool.com/example_codes/ on Jan 2nd, 2017 From: http://sitestree.com/?p=10331
Categories:Programming Code Examples, Java/J2EE/J2ME, AWT Components
Tags:Java/J2EE/J2MEAWT Components
Post Data:2017-01-02 16:04:35
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