Multiple catch blocks in Java - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to catch an ArithmeticException.

Java

try {
    int result = 10 / 0;
} catch ([1] e) {
    System.out.println("Cannot divide by zero.");
}

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ANullPointerException

BIOException

CArithmeticException

DArrayIndexOutOfBoundsException

Attempts:

3 left

💡 Hint

Common Mistakes

Using IOException instead of ArithmeticException.

Catching NullPointerException which is unrelated here.

The code tries to divide by zero, which throws an ArithmeticException. The catch block must specify ArithmeticException to handle it.

2fill in blank

medium

Complete the code to catch a NullPointerException.

Java

String text = null;
try {
    int length = text.length();
} catch ([1] e) {
    System.out.println("Text is null.");
}

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ANullPointerException

BIOException

CArithmeticException

DNumberFormatException

Attempts:

3 left

💡 Hint

Common Mistakes

Catching IOException which is unrelated.

Using ArithmeticException which is for math errors.

Calling length() on a null string throws a NullPointerException. The catch block must handle this exception.

3fill in blank

hard

Fix the error in the catch block to handle NumberFormatException.

Java

try {
    int num = Integer.parseInt("abc");
} catch ([1] e) {
    System.out.println("Invalid number format.");
}

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AIOException

BArithmeticException

CNullPointerException

DNumberFormatException

Attempts:

3 left

💡 Hint

Common Mistakes

Catching IOException which is unrelated here.

Using ArithmeticException which is for math errors.

Parsing "abc" as an integer throws a NumberFormatException. The catch block must specify this exception to handle it.

4fill in blank

hard

Fill both blanks to catch ArithmeticException and NullPointerException separately.

Java

try {
    int result = 10 / 0;
    String text = null;
    int length = text.length();
} catch ([1] e) {
    System.out.println("Arithmetic error occurred.");
} catch ([2] e) {
    System.out.println("Null pointer error occurred.");
}

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AArithmeticException

BIOException

CNullPointerException

DNumberFormatException

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the exception types in the catch blocks.

Using unrelated exceptions like IOException.

The first catch block handles ArithmeticException from dividing by zero. The second catch block handles NullPointerException from calling a method on null.

5fill in blank

hard

Fill all three blanks to catch NumberFormatException, ArithmeticException, and NullPointerException in separate catch blocks.

Java

try {
    int num = Integer.parseInt("abc");
    int result = 10 / 0;
    String text = null;
    int length = text.length();
} catch ([1] e) {
    System.out.println("Number format error.");
} catch ([2] e) {
    System.out.println("Arithmetic error.");
} catch ([3] e) {
    System.out.println("Null pointer error.");
}

Drag options to blanks, or click blank then click option'

AIOException

BArithmeticException

CNullPointerException

DNumberFormatException

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of exceptions in catch blocks.

Using IOException which is unrelated.

The first catch block handles NumberFormatException from parsing "abc". The second handles ArithmeticException from dividing by zero. The third handles NullPointerException from calling a method on null.