/* Unchecked
java.lang.ArithmeticException: / by zero will terminates the program*/
public class Exception_1
{
public static void main(String args[])
{
int a=5,b=0;
System.out.println(a/b);
System.out.println("\nThe -
ArithmeticException() / divide by 0 will ");
}
}
Output
: Following exception will be thrown at
the line “System.out.println(a/b);”
java.lang.ArithmeticException: / by
zero
at Exception_1.main(Exception_1.java:8)
Users Defined Exception :
/*Userdefined Exception */
public class Exception_2
{
public static void main(String
args[])
{
int stock_qty =
500,Sold = 400;
System.out.println("\nCurrent
Stock : "+stock_qty);
if (stock_qty <
Sold)
{
ArithmeticException AE = new ArithmeticException("Stock is not
Available");
throw
AE;
}
else
{
stock_qty=stock_qty-Sold;
System.out.println("Product Sold and new Stock is
"+stock_qty);
}
}
}
Output:
When, Sold =400 :
Current Stock : 500
Product Sold and new Stock is 100
Output
: Whem, Sold = 600 :
java.lang.ArithmeticException: Stock
is not Available
at
Exception_2.main(Exception_2.java:10)
/* Input/Output Exception without
try/catch Block */
import java.io.*;
class Exception_3
{
public static void main(String
args[])throws IOException
{
BufferedReader br=new BufferedReader(new
InputStreamReader(System.in));
int Num;
System.out.print("Enter a Number : ");
Num=Integer.parseInt(br.readLine());
System.out.println("\nNumber
Inputted : "+Num);
}
}
Output: If anything else than an
integer value given as input –
Enter a Number : e
java.lang.NumberFormatException: For
input string: "e"
at
java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at
java.lang.Integer.parseInt(Integer.java:447)
at
java.lang.Integer.parseInt(Integer.java:497)
at
Exception_3.main(Exception_3.java:10)
Output
:
When integer value given as input –
Enter a Number : 12
Number
Inputted : 12
/* Input/Output Exception and
FileNotFound Exception */
import java.io.*;
public class Exception_4
{
public static void main(String
args[])
{
try {
File Fil = new
File("Data.dat");
FileInputStream fis
= new FileInputStream(Fil);
BufferedReader BR =
new BufferedReader(new InputStreamReader(fis));
System.out.print("Enter a No. ");
int Num =
Integer.parseInt(BR.readLine());
}
catch (FileNotFoundException
FE)
{
System.out.println(FE);
}
catch (IOException IE)
{
System.out.println(IE);
}
}
}
Output :
java.io.FileNotFoundException:
Data.dat (The system cannot find the file specified)
/*Multiple Catch Block with Finally
Block*/
public class Exception_5
{
public static void main(String
args[])
{
int Num=5;
try
{
Num= Num/0;
}
catch(Exception Exp)
{
System.out.println("Catch Block [cause : division by zero ]");
}
finally
{
System.out.println("Finally Block, Value of Num "+Num);
}
try
{
Num =6;
Num = Num/2;
}
catch(Exception Exp)
{
System.out.println("Catch Block [This one will not execute]");
}
finally
{
System.out.println("Finally Block, Value of Num "+Num);
}
}
}
Output :
Catch Block [cause : division by zero
]
Finally Block, Value of Num 5
Finally Block, Value of Num 3
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