import java.util.*;

class exception1

{

static void m1()

{

System.out.println("start m1");

m2();

System.out.println("end m1");

}

static void m2()

{

System.out.println("start m2");

m3();

System.out.println("end m2");

}

static void m3()

{

System.out.println("start m3");

m4();

System.out.println("end m3");

}

static void m4()

{

System.out.println("start m4");

System.out.println("Observe exception stack");

int a=10/0;

System.out.println("end m4");

}

public static void main(String [] args)

{

List a=new ArrayList();

a.add(2);

m1();

System.out.println(a.get(0) instanceof Integer);

}

}