Question

我在某处读取了这段代码，当我在netbeans中编写它时，它正在打印所需的输出，但会显示一条警告＆＃34; Throwable实例未被抛出＆＃34;

class Demo {

    public static void f1() throws MyException {
        throw new MyException; // Warning at this line i.e. Throwable instance not thrown
    }

    public static void f2() throws MyException {
        f1();
    }

    public static void f3() throws MyException {
        f2();
    }

    public static void main(String[] args) {
        try {
            f3();
        } catch (Exception e) {
            System.out.println("Exception in handled in main method");
        }
    }
}

class MyException extends Exception {

}

任何人都可以告诉我为什么它会显示此警告。

Answer 1

我想感谢QBrute指出错误。

更正代码

class Demo {

    public static void f1() throws MyException {
        throw new MyException(); // I forgot to add parenthesis.
    }

    public static void f2() throws MyException {
        f1();
    }

    public static void f3() throws MyException {
        f2();
    }

    public static void main(String[] args) {
        try {
            f3();
        } catch (Exception e) {
            System.out.println("Exception in handled in main method");
        }
    }
}

class MyException extends Exception {

}

投掷的实例没有抛出

1 个答案: