Notes

Lab8 - 1
public class CommandLineArguments {
public static void main(String[] args) {
try {
if (args.length != 2) {
throw new IllegalArgumentException("Please provide two command line arguments.");
}

int num1 = Integer.parseInt(args[0]);
int num2 = Integer.parseInt(args[1]);

if (num2 == 0) {
throw new ArithmeticException("Division by zero not allowed.");
}

int result = num1 / num2;
System.out.println("Result: " + result);
} catch (NumberFormatException e) {
System.out.println("Invalid command line argument. Please enter integer values only.");
} catch (IllegalArgumentException e) {
System.out.println(e.getMessage());
} catch (ArithmeticException e) {
System.out.println(e.getMessage());
}
}
}

- javac CommandLineArgument.java
- java CommandLineArgument 23
- java CommandLineArgument 23 0


Lab8 - 2
class NoMatchException extends Exception {
public NoMatchException(String message) {
super(message);
}
}

public class StringMatcher {
public static void main(String[] args) {
String inputString = "USA";
try {
if (!inputString.equals("India")) {
throw new NoMatchException("Input string does not match India");
} else {
System.out.println("Input string matches India");
}
} catch (NoMatchException e) {
System.out.println("Caught exception: " + e.getMessage());
}
}
}

Lab13
import java.util.Scanner;

public class CharacterCounter {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

System.out.print("Enter a string: ");
String str = scanner.nextLine();

System.out.print("Enter a character to count: ");
char c = scanner.nextLine().charAt(0);

int count = 0;
for (int i = 0; i < str.length(); i++) {
if (str.charAt(i) == c) {
count++;
}
}

System.out.println("The character '" + c + "' occurs " + count + " times in the string.");
}
}