Exception Hierarchy

title: Exception Hierarchy description: Java exception class hierarchy

Throwable ├── Error (Unchecked — Handle nahi karte) │ ├── OutOfMemoryError │ ├── StackOverflowError │ └── VirtualMachineError │ └── Exception ├── Checked Exceptions (Compile time) │ ├── IOException │ │ ├── FileNotFoundException │ │ └── EOFException │ ├── SQLException │ ├── ClassNotFoundException │ └── InterruptedException │ └── RuntimeException (Unchecked — Runtime) ├── NullPointerException ├── ArrayIndexOutOfBoundsException ├── ClassCastException ├── ArithmeticException ├── NumberFormatException ├── IllegalArgumentException └── IllegalStateException

Throwable Class

getMessage(), toString(), printStackTrace(), getCause() methods hain.

Catching Parent Exception

Parent exception catch karna child bhi pakad leta hai:

java exampleWoHoTech

catch (Exception e) { } // Sab pakad lega
catch (RuntimeException e) { } // Sirf unchecked

Exception Chaining

java exampleWoHoTech

try {
    // DB operation
} catch (SQLException e) {
    throw new RuntimeException("Database error", e); // cause chain
}

title: Exception Hierarchy description: Java exception class hierarchy

Throwable Class

getMessage(), toString(), printStackTrace(), getCause() methods hain.

Catching Parent Exception

Parent exception catch karna child bhi pakad leta hai:

java exampleWoHoTech

catch (Exception e) { } // Sab pakad lega
catch (RuntimeException e) { } // Sirf unchecked

Exception Chaining

java exampleWoHoTech

try {
    // DB operation
} catch (SQLException e) {
    throw new RuntimeException("Database error", e); // cause chain
}

Exception Hierarchy

Throwable Class

Catching Parent Exception

Exception Chaining

Continue learning this concept

Exception Hierarchy

Throwable Class

Catching Parent Exception

Exception Chaining

Continue learning this concept