File Read Applet : Security Applet « Security « Java

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Java » Security » Security AppletScreenshots 
File Read Applet

/**
 @version 1.00 1999-10-23
 @author Cay Horstmann
 */

import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class FileReadApplet extends JApplet {
  public FileReadApplet() {
    fileNameField = new JTextField(20);
    JPanel panel = new JPanel();
    panel.add(new JLabel("File name:"));
    panel.add(fileNameField);
    JButton openButton = new JButton("Open");
    panel.add(openButton);
    openButton.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent event) {
        loadFile(fileNameField.getText());
      }
    });

    Container contentPane = getContentPane();
    contentPane.add(panel, "North");

    fileText = new JTextArea();
    contentPane.add(new JScrollPane(fileText)"Center");
  }

  public void loadFile(String filename) {
    try {
      fileText.setText("");
      BufferedReader in = new BufferedReader(new FileReader(filename));
      String s;
      while ((s = in.readLine()) != null)
        fileText.append(s + "\n");
      in.close();
    catch (IOException e) {
      fileText.append(e + "\n");
    catch (SecurityException e) {
      fileText.append("I am sorry, but I cannot do that.");
    }
  }

  private JTextField fileNameField;

  private JTextArea fileText;
}

// applet.html

//<APPLET CODE="FileReadApplet.class" ARCHIVE="FileReadApplet.jar" WIDTH=400
// HEIGHT=300></APPLET>



           
       
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