public class ExceptionHandling {

public static void main(String[] args) {

//todo:

//1.) Execute the following program. It will throw Exceptions.

//Catch the Exceptions using their proper Names till no further

//exceptions occur.

//

//2.) Taking the square root of a negative number won't cause

//the exception. Write your own Exception for this case and

//write a method which throws this exception

try{

int a = 5;

int b = 0;

int div = a/b;

}

catch(ArithmeticException e){

System.err.println("error occurred");

e.printStackTrace();

}

try{

int[] arr = new int[5];

arr[5] = 7;

}

catch(ArrayIndexOutOfBoundsException e){

System.err.println("error occurred");

e.printStackTrace();

}

try{

String one = "one";

int i = Integer.parseInt(one);

}

catch(NumberFormatException e){

System.err.println("error occurred");

e.printStackTrace();

}

try{

double c = -7.0;

double d = root(c);

System.out.println(d);

}

catch(CustomException e){

System.err.println("error occurred");

e.printStackTrace();

}

}

public static double root(double c) throws CustomException{

if(c<0){

throw new CustomException("cannot sqrt negative number");

}

else{

return Math.sqrt(c);

}

}

}