codice:
import java.net.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;



public class googleSearch extends Applet implements ActionListener {

  private TextField t;
  private Button b;
  private Button grab;

  public void actionPerformed(ActionEvent ae) {
    AppletContext ac = this.getAppletContext();
    if (ae.getSource().equals(b)) {
      try {
        

        String query = t.getText().replaceAll("\\s+","+");
        ac.showDocument(new URL("http://www.google.it/search?hl=it&q="+query+"&meta="), "_blank");
      }
      catch (Exception e) {
        ac.showStatus(e.toString());
      }
    }
    else {
      try {
        ac.showDocument(new URL(this.getCodeBase()+"/googleSearch.java"));
      }
      catch (Exception e) {
        ac.showStatus(e.toString());
      }
    }
  }


  public void init() {
    this.setLayout(new BorderLayout());
    Panel p = new Panel();
    t = new TextField(20);
    b = new Button("Cerca con Google");
    b.addActionListener(this);
    grab = new Button("Scarica sorgente");
    grab.addActionListener(this);

    p.add(t);
    p.add(b);

    this.add(p, BorderLayout.NORTH);
    this.add(grab, BorderLayout.SOUTH);
  }
}
Con questo fai una ricerca su google.

Link all'esempio online
http://www.andrea79.altervista.org/h...gleSearch.html