final与finally的区别

Final and finally are two different concepts in programming.

Final is a keyword in many programming languages, including Java and C++, that is used to define a constant value that cannot be changed. It is often used to declare a variable, method, or class as immutable.

Here is an example of using final in Java:

javapublic class Example {
 final int x =10; // declaring a final variable final void display() { // declaring a final method System.out.println("This is a final method");
 }
}

In this example, the variable x and the method display are both declared as final, which means their values and implementations cannot be changed.

On the other hand, finally is a block of code that is used in exception handling to ensure that certain code is always executed, regardless of whether an exception is thrown or not.

Here is an example of using finally in Java:

javapublic class Example {
 public static void main(String[] args) {
 try {
 // some code that may throw an exception } catch (Exception e) {
 // handle the exception } finally {
 // code that will always be executed System.out.println("This code will always be executed");
 }
 }
}

In this example, the code inside the finally block will always be executed, regardless of whether an exception is thrown or not.

In summary, final is used to declare a constant value that cannot be changed, while finally is used to ensure that certain code is always executed in exception handling. They are two distinct concepts in programming and should not be confused with each other.