What is a try-catch-finally block?
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In Java, a try-catch-finally block is used to handle exceptions and ensure that specific code always executes, whether an exception occurs or not.
🔹 try block
The try block contains code that might throw an exception. It's the section where you place risky code like file operations, database access, or network calls.
try {
int result = 10 / 0; // risky code
}
🔹 catch block
The catch block is used to handle specific exceptions thrown in the try block. You can have multiple catch blocks for different exception types.
catch (ArithmeticException e) {
System.out.println("Cannot divide by zero");
}
🔹 finally block
The finally block always executes, whether or not an exception is thrown or caught. It's used to release resources like files, sockets, or database connections.
finally {
System.out.println("This block always executes");
}
✅ Complete Example:
try {
int result = 10 / 0;
} catch (ArithmeticException e) {
System.out.println("Error: " + e.getMessage());
} finally {
System.out.println("Cleaning up resources...");
}
🔍 Key Points:
The try block must be followed by at least one catch or a finally block.
You can have multiple catch blocks for different exceptions.
The finally block is optional but recommended for resource cleanup.
Conclusion:
The try-catch-finally structure provides a safe way to handle errors and ensure important code always runs, making your Java programs more reliable and robust.
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