Try It Yourself - SyntaxStudy Editor

HTML / CSS / JS

import java.io.StringReader;
import java.io.IOException;

public class ExceptionHandling {

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

static double withdraw(double balance, double amount)
            throws InsufficientFundsException {
        if (amount > balance) {
            throw new InsufficientFundsException(amount - balance);
        }
        return balance - amount;
    }

public static void main(String[] args) {

// Basic try-catch-finally
        try {
            int[] arr = new int[3];
            arr[5] = 10;                    // ArrayIndexOutOfBoundsException
        } catch (ArrayIndexOutOfBoundsException e) {
            System.out.println("Caught: " + e.getMessage());
        } finally {
            System.out.println("Finally block always runs");
        }

// Multi-catch
        String[] inputs = {"42", "hello", null};
        for (String input : inputs) {
            try {
                int value = Integer.parseInt(input.trim());
                System.out.println("Parsed: " + value);
            } catch (NumberFormatException | NullPointerException e) {
                System.out.println("Bad input (" + e.getClass().getSimpleName() + ")");
            }
        }

// Custom checked exception
        try {
            double balance = withdraw(100.0, 150.0);
        } catch (InsufficientFundsException e) {
            System.out.printf("Error: %s (short by %.2f)%n",
                e.getMessage(), e.getAmount());
        }

// Try-with-resources (auto-close)
        try (StringReader reader = new StringReader("hello")) {
            System.out.println("Read char: " + (char) reader.read());
        } catch (IOException e) {
            e.printStackTrace();
        }
        // reader.close() called automatically
    }
}