java - 如何抛出 IOException？

Question

public class ThrowException {
    public static void main(String[] args) {
        try {
            foo();
        }
        catch(Exception e) {
             if (e instanceof IOException) {
                 System.out.println("Completed!");
             }
          }
    }
    static void foo() {
        // what should I write here to get an exception?
    }
}

嗨!我刚开始学习异常并且需要 catch 一个expetion，所以请任何人都可以为我提供解决方案吗？我将不胜感激。谢谢!

Answer 1

static void foo() throws IOException {
    throw new IOException("your message");
}