Try It Yourself - SyntaxStudy Editor

HTML / CSS / JS

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

// Custom checked exception
class InsufficientFundsException extends Exception {
    private final double amount;
    InsufficientFundsException(double amount) {
        super("Insufficient funds: need " + amount + " more");
        this.amount = amount;
    }
    public double getAmount() { return amount; }
}

// Custom unchecked exception
class InvalidAccountException extends RuntimeException {
    InvalidAccountException(String id) {
        super("Account not found: " + id);
    }
}

public class ExceptionTypesDemo {

static void withdraw(double balance, double amount)
            throws InsufficientFundsException {
        if (amount > balance) {
            throw new InsufficientFundsException(amount - balance);
        }
        System.out.println("Withdrew: " + amount);
    }

static void openAccount(String id) {
        if (id == null || id.isBlank()) {
            throw new InvalidAccountException(id); // unchecked
        }
    }

public static void main(String[] args) {
        // Checked exception — must handle
        try {
            withdraw(100.0, 150.0);
        } catch (InsufficientFundsException e) {
            System.out.println("Caught: " + e.getMessage());
            System.out.println("Short by: " + e.getAmount());
        }

// Unchecked exception
        try {
            openAccount("");
        } catch (InvalidAccountException e) {
            System.out.println("Caught unchecked: " + e.getMessage());
        }
    }
}