Java

TOPIC i04 – ERROR HANDLING 1 - BASICS

LESSON WORK

QUESTION #1

For each of the following, state what will be outputted to screen. The focus is on whether you fully understand the try/catch and ‘throws Exception’ flow path.

//A)

public static void main(String[] args)

{

int[] a = {4,5,6};

try

{

System.out.println("A");

a[3]=4; //creates exception?

System.out.println("B");

}

catch(IndexOutOfBoundsException e)

{

System.out.println("C");

}

finally

{

System.out.println("D");

}

System.out.println("E");

}

//B)

public static void main(String[] args)

{

int[] a = {44,62,51,16};

try

{

System.out.println("A");

a[3]=4; //creates exception?

System.out.println("B");

}

catch(IndexOutOfBoundsException e)

{

System.out.println("C");

}

finally

{

System.out.println("D");

}

System.out.println("E");

}

//C)

public class SmallHeadache

{

public static void main(String[] args)

{

System.out.println("i");

yokes();

System.out.println("ii");

}

public static void yokes()

{

System.out.println("1");

yikes();

System.out.println("2");

}

public static void yikes()

{

int[] a = {4,5,6};

try

{

System.out.println("A");

a[-1]=4; //creates exception

System.out.println("B");

}

catch(IndexOutOfBoundsException e)

{

System.out.println("C");

}

finally

{

System.out.println("D");

}

System.out.println("E");

}

}

//D

public class SmallHeadache2

{

public static void main(String[] args)

{

System.out.println("i");

try

{

System.out.println("ii");

yokes();

System.out.println("iii");

}

catch (IndexOutOfBoundsException e)

{

System.out.println("iv");

}

System.out.println("v");

}

public static void yokes()

{

System.out.println("1");

yikes();

System.out.println("2");

}

public static void yikes() throws IndexOutOfBoundsException

{

int[] a = {4,5,6};

System.out.println("A");

a[-1]=4; //creates exception

System.out.println("B");

}

}

//E

public class SmallHeadache

{

public static void main(String[] args)

{

yikes();

}

public static void yikes()

{

try

{

System.out.println("A");

int[] a = {4,5,6,7,8};

a[-1]=4; //creates exception

System.out.println("B");

return;

}

catch (Exception e)

{

System.out.println("C");

return;

}

finally

{

System.out.println("D");

}

}

}