解决方法
您可以使用动态代理.只要检查的异常是接口的一部分,您可以从调用处理程序中抛出检查的异常.否则,这是非法的,并将创建一个UndeclaredThrowableException来包装抛出的检查的异常.
interface A{
void x() throws IOException;
}
A proxy = (A) newProxyInstance(classLoader,new Class<?>[]{A.class},new InvocationHandler() {
@Override
public Object invoke(Object arg0,Method arg1,Object[] arg2)
throws Throwable {
throw new IOException();
}
}
);
proxy.x();
输出：
Exception in thread "main" java.io.IOException at X$1.invoke(X.java:19) at $Proxy0.x(Unknown Source) at X.main(X.java:22)
对于接口A,未经声明的检查异常：
interface A{
void x();
}
Exception in thread "main" java.lang.reflect.UndeclaredThrowableException
at $Proxy0.x(Unknown Source)
at X.main(X.java:22)
Caused by: java.io.IOException
at X$1.invoke(X.java:19)
... 2 more
