Java Try-Catch: Exception Handling Guide

In Java, the try-catch statement is used to catch and handle exceptions. Its basic usage is as follows:

try {
   // 可能会抛出异常的代码块
} catch (ExceptionType1 e1) {
   // 处理异常类型1的代码
} catch (ExceptionType2 e2) {
   // 处理异常类型2的代码
} finally {
   // 最终会执行的代码块（可选）
}

In the try block, we can place code that may throw an exception. If an exception occurs within the block, the program will immediately jump to the catch block that matches the type of the exception and execute the corresponding code. If there is no catch block that matches the type of the thrown exception, the exception will be passed to the higher level of the call stack.

The catch block is used to specify the code that handles a specific type of exception. Multiple catch blocks can be used to handle different types of exceptions. Each catch block takes an exception object as a parameter, which can be used to access information about the exception.

The finally block is optional, used to contain code that needs to be executed regardless of whether an exception occurs. The code within the finally block will always be executed, typically used for releasing resources or performing cleanup operations.

In summary, the try-catch statement is used to catch and handle exceptions, ensuring that the program can gracefully handle abnormal situations and prevent the program from crashing.