try-catch-finally

public class Main {

    public static void main(String[] args) {
        System.out.println(" return ："WithException());
    }

    public static int WithException() {
        int i = 10;
        try {
            System.out.println("i in try block is ： " + i);
            i = i / 0;
            return --i;
        } catch (Exception e) {
            System.out.println("i in catch - form try block is ： " + i);
            --i;
            System.out.println("i in catch block is ： " + i);
            return --i;
        } finally {
            System.out.println("i in finally - from try or catch block is--" + i);
            --i;
            System.out.println("i in finally block is--" + i);
             return --i;
        }
    }
}

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Output ：

i in try block is ： 10
i in catch - form try block is ： 10
i in catch block is ： 9
i in finally - from try or catch block is--8
i in finally block is--7
 return ：6

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If changed to the following （ final return sentence ）：

public class Main {

    public static void main(String[] args) {
        System.out.println(WithException());
    }

    public static int WithException() {
        int i = 10;
        try {
            System.out.println("i in try block is ： " + i);
            i = i / 0;
            return --i;
        } catch (Exception e) {
            System.out.println("i in catch - form try block is ： " + i);
            --i;
            System.out.println("i in catch block is ： " + i);
            return --i;
        } finally {
            System.out.println("i in finally - from try or catch block is--" + i);
            --i;
            System.out.println("i in finally block is--" + i);
            // return --i;
        }
    }
}

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Output ：

i in try block is ： 10
i in catch - form try block is ： 10
i in catch block is ： 9
i in finally - from try or catch block is--8
i in finally block is--7
 return ：8

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summary ： 1、finally There is no return when , After execution try or catch Of the statement return After that, it will be executed finally.（ and return The value of will be temporarily stored in the stack , wait for finally After execution, return to ） 2、finally There are return when , Will still carry out try or catch Of the statement return, But the end result is finally Statement return.