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import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.event.*;
public class ThreadDemo extends JFrame {
/**
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*/
private static final long serialVersionUID = 1L;
public ThreadDemo() {
JButton btn = new JButton("Click me");
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public class OuterClass
{
public class InnerClass
{
public int code = 100;
}
public static void main(String[] args)
{
OuterClass outer = new OuterClass();
OuterClass.InnerClass o = outer.new InnerClass();
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