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Java applets

Applets don't have a main method and are inherited from java.applet.Applet.
The following is a simple Applet. 
public class ASimpleApplet extends java.applet.Applet {

  public void paint(java.awt.Graphics g) {
    g.drawString(s_, 10, 10);
  }

  public void init() {
    s_=new String("hello World");
  }

  String s_;
}
Embedding an applet in html.