Exercise-9:
a)creation of illustrating throw
AIM: To write a JAVA program for creation of Illustrating throw
SOURCE-CODE:
class throwdemo
{
public static void main(String args[])
{
try
{
throw new NullPointerException("demo");
}
catch(NullPointerException e)
{
System.out.println(e);
}
}
}
OUT-PUT:
java.lang.NullPointerException: demo
b)creation of illustrating finally
AIM: To write a JAVA program for creation of Illustrating finally
SOURCE-CODE(i):
class finallydemo
{
public static void main(String args[])
{
try
{
int a=10,b=0;
int c=a/b;
System.out.println(c);
}
catch(ArithmeticException e)
{
System.out.println(e);
}
finally
{
System.out.println("This is inside finally block");
}
}
}
OUT-PUT:
java.lang.ArithmeticException: / by zero
This is inside finally block
SOURCE-CODE(ii):
class finallydemo
{
public static void main(String args[])
{
try
{
int a=10,b=5;
int c=a/b;
System.out.println(c);
}
catch(ArithmeticException e)
{
System.out.println(e);
}
finally
{
System.out.println("This is inside finally block");
}
}
}
OUT-PUT:
2
This is inside finally block
c)creation of Java Built-in-Exceptions
AIM: To write a JAVA program for creation of Java Built-in Exceptions
SOURCE-CODEs:
(i) Arithmetic exception
class arithmeticdemo
{
public static void main(String args[])
{
try
{
int a = 10, b = 0;
int c = a/b;
System.out.println (c);
}
catch(ArithmeticException e)
{
System.out.println (e);
}
}
}
OUT-PUT:
java.lang.ArithmeticException: / by zero
(ii)NullPointer Exception
class nullpointerdemo
{
public static void main(String args[])
{
try
{
String a = null;
System.out.println(a.charAt(0));
}
catch(NullPointerException e)
{
System.out.println(e);
}
}
}
OUT-PUT:
java.lang.NullPointerException
(iii)StringIndexOutOfBound Exception
class stringbounddemo
{
public static void main(String args[])
{
try
{
String a = "This is like chipping ";
char c = a.charAt(24);
System.out.println(c);
}
catch(StringIndexOutOfBoundsException e)
{
System.out.println(e);
}
}
}
OUT-PUT:
java.lang.StringIndexOutOfBoundsException:
String index out of range: 24
(iv)FileNotFound Exception
import java.io.*;
class filenotfounddemo
{
public static void main(String args[])
{
try
{
File file = new File("E://file.txt");
FileReader fr = new FileReader(file);
}
catch (FileNotFoundException e)
{
System.out.println(e);
}
}
}
OUT-PUT:
java.io.FileNotFoundException: E:\file.txt (The system cannot find the file specified)
(v)NumberFormat Exception
class numberformatdemo
{
public static void main(String args[])
{
try
{
int num = Integer.parseInt ("akki") ;
System.out.println(num);
}
catch(NumberFormatException e)
{
System.out.println(e);
}
}
}
OUT-PUT:
java.lang.NumberFormatException: For input string: "akki"
(vi)ArrayIndexOutOfBounds Exception
class arraybounddemo
{
public static void main(String args[])
{
try
{
int a[] = new int[5];
a[6] = 9;
}
catch(ArrayIndexOutOfBoundsException e)
{
System.out.println (e);
}
}
}
OUT-PUT:
java.lang.ArrayIndexOutOfBoundsException: 6
d)creation of User Defined Exception
AIM: To write a JAVA program for creation of User Defined Exception
SOURCE-CODE:
class A extends Exception
{
A(String s1)
{
super(s1);
}
}
class owndemo
{
public static void main(String args[])
{
try
{
throw new A("demo ");
}
catch(Exception e)
{
System.out.println(e);
}
}
}
OUT-PUT:
A: demo
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