我在以下代码中使用了lambda表达式,但是即使该方法引发了一个已检查的异常,Eclipse也不要求我用try,catch块包装调用。为什么?
package lambda;
//Throw an exception from a lambda expression.
interface DoubleNumericArrayFunc {
double func(double[] n) throws EmptyArrayException;
}
class EmptyArrayException extends Exception { // Checked exception
}
public class LambdaExceptionDemo {
public static void main(String args[]) throws EmptyArrayException {
DoubleNumericArrayFunc average = (n) -> {
if (true)
throw new EmptyArrayException();
return 1;
};
// Why try catch isn't required here?
System.out.println("The average is " + average.func(new double[0]));
}
}
最佳答案
public static void main(String args[]) throws EmptyArrayException {
因为您在
throws
上有一个main()
子句。允许传播该异常,因此不需要捕获它。删除throws
,您将需要添加一个try / catch。