`A` RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine.
`B` A method is not required to declare in its throws clause ...
根据下面的程序代码，哪些选项的值返回true？public class Square {
long width;
public Square(long l) {
width = l;
}
public static void main(String arg[]) {
Square a, b, c; ...