java 我可以在一个班级中有两个以上的 finally 块吗
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can I have more than two finally block in a class
提问by arvin_codeHunk
I am working on a project where I need to perform two different operation. I have a finally block in my main controller method.
我正在做一个需要执行两种不同操作的项目。我的主控制器方法中有一个 finally 块。
My question is, can I have more than two finally, for example:
我的问题是，我最后能不能有两个以上，例如：
class test
{
X()
{
try
{
//some operations
}
finally
{
// some essential operation
}
}
//another method
Y()
{
try
{
//some operations
}
finally
{
// some another essential operation
}
}
}
so,is it possible?
那么，有可能吗？
回答by Jon Skeet
You can only have one finallyclause per try/catch/finally statement, but you can have multiple such statements, either in the same method or in multiple methods.
每个 try/catch/finally 语句只能有一个finally子句，但可以有多个这样的语句，在同一个方法中或在多个方法中。
Basically, a try/catch/finally statement is:
基本上，一个 try/catch/finally 语句是：
trycatch(0 or more)finally(0 or 1)
trycatch(0个或更多)finally（0 或 1）
... but there must be at leastone of catch/finally(you can't have just a "bare" trystatement)
...但必须至少有一个catch/ finally（你不能只有一个“裸”try语句）
Additionally, you can nest them;
此外，您可以嵌套它们；
// Acquire resource 1
try {
// Stuff using resource 1
// Acquire resource 2
try {
// Stuff using resources 1 and 2
} finally {
// Release resource 2
}
} finally {
// Release resource 1
}
回答by Azodious
can I have more than two finally
最后我能有两个以上吗
Yes, you can have as many try - catch - finallycombination you want but they all should be correctly formatted. (i.e syntax should be correct)
是的，您可以拥有任意数量的try - catch - finally组合，但它们都应该正确格式化。（即语法应该是正确的）
In your example, you've written correct syntax and it'll work as expected.
在您的示例中，您编写了正确的语法，它会按预期工作。
You can have in following way:
您可以通过以下方式获得：
try
{
}
catch() // could be more than one
{
}
finally
{
}
OR
或者
try
{
try
{
}
catch() // more than one catch blocks allowed
{
}
finally // allowed here too.
{
}
}
catch()
{
}
finally
{
}
回答by Surya
public class Example {
public static void main(String[] args) {
try{
try{
int[] a =new int[5];
a[5]=4;
}catch (ArrayIndexOutOfBoundsException e)
{
System.out.println("Out Of Range");
}finally{
System.out.println("Finally Outof Range Block");
}
try{
int x=20/0;
}catch (ArithmeticException e)
{
System.out.println("/by Zero");
}finally{
System.out.println("FINALLY IN DIVIDES BY ZERO");
}
}catch (Exception e) {
System.out.println("Exception");
}
finally{
System.out.println("FINALLY IN EXCEPTION BLOCK");
}
System.out.println("COMPLETED");
}
}
......
......
