Common scenarios where exceptions may occur

There are given some scenarios where unchecked exceptions can occur. They are as follows:


1) Scenario where ArithmeticException occurs

If we divide any number by zero, there occurs an ArithmeticException.



int a=50/0;//ArithmeticException
2) Scenario where NullPointerException occurs

If we have null value in any variable, performing any operation by the variable occurs an NullPointerException.



String s=null;
System.out.println(s.length());//NullPointerException
3) Scenario where NumberFormatException occurs

The wrong formatting of any value, may occur NumberFormatException. Suppose I have a string variable that have characters, converting this variable into digit will occur NumberFormatException.



String s="abc";
int i=Integer.parseInt(s);//NumberFormatException
4) Scenario where ArrayIndexOutOfBoundsException occurs

If you are inserting any value in the wrong index, it would result ArrayIndexOutOfBoundsException as shown below:



int a[]=new int[5];
a[10]=50; //ArrayIndexOutOfBoundsException