how to set path and run java program

how to set path  and run java program

create a frame in java

how to create a frame in java small program
 import java.awt.*;
 import java.awt.event.*;
 public class FrameDemo extends Frame
 { FrameDemo()
 { Frame f=new Frame("EXAMPLE"); 
f.setSize(500,300);
 f.setResizable(false);
 f.setVisible(true);
 } 
public static void main(String args[])
 {
 FrameDemo fd=new FrameDemo();
 }
 }

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