如何使用 Try catch 在非返回方法中避免无限递归

Question

公共类示例{

public static void main(String[] args) {

    method();

}

public static void method()
{
    try {
        System.out.println("function");
        throw new StaleElementReferenceException("thih sexception occured");
    }
    catch (StaleElementReferenceException e) {
        method();
    }
    catch (Exception e) {
        System.out.println("AssertFail");
    }
}

}

如何使用 Try catch 在非返回方法中避免无限递归...例如下面的代码...当 StaleElementException 仅发生一次时，我想执行“异常之后的函数，如果 Stale Element 第二次发生我希望它去异常捕获并打印断言失败..如何？

Answer 1

public class Sample {

public static void main(String[] args) {

    method(false);

}

public static void method(boolean calledFromCatchBlock)
{
    try {
        System.out.println("function");
        if(!calledFromCatchBlock) {
            throw new StaleElementReferenceException("thih sexception occured");
        } else {
            throw new Exception();
        }
    } catch (StaleElementReferenceException e) {
        method(true);
    } catch (Exception e) {
        System.out.println("AssertFail");
    }
}
}

Answer 2

当您在method() 之外抛出异常（例如boolean 标志）时，您应该以某种方式存储状态，检查此状态并在下次抛出修改后的异常：

private static boolean alreadyThrown = false;

public static void method()
{
    try {
        System.out.println("function");
        if (alreadyThrown) {
            throw new RuntimeException("another exception occured");
        } else {
            alreadyThrown = true;
            throw new StaleElementReferenceException("this exception occured");
        }
    }
    catch (StaleElementReferenceException e) {
        method();
    }
    catch (Exception e) {
        System.out.println("AssertFail");
    }
}

或者您可以为method(int arg) 提供一些参数并以类似的方式检查其值：

public static void main(String[] args) {
    method(1);
}

public static void method(int arg)
{
    try {
        System.out.println("function");
        if (arg > 1) {
            throw new RuntimeException("another exception occured");
        } else {
            throw new StaleElementReferenceException("this exception occured");
        }
    }
    catch (StaleElementReferenceException e) {
        method(arg + 1);
    }
    catch (Exception e) {
        System.out.println("AssertFail");
    }
}