昨日翻译
“ The most I can do for my friend is simply to be his friend. I have no wealth to bestow on him. If he knows that I am happy in loving him, he will want no other reward. Is not friendship divine in this? ”
—— Henry David Thoreau
“我能为我的朋友做的最多的事就是做他的朋友。我没有财富给他。如果他知道我爱他是幸福的,他不会想要其他的奖赏。友谊不是神圣的吗?”
——亨利·大卫·梭罗
“ Other men said they have seen angels, But I have seen thee And thou art enough. ”
—— G. E. Moore
2019.07.12问题及解析
下列方法定义中,正确的是?
A.int fun(){char c = 'a'; return (int)c;}
B.void fun(){...return true;}
C.int fun(){...return true;}
D.int fun(int a,b){return a+b;}
方法名前可以定义返回值,每一个参数都需要定义类型
A.char类型都有对应的字符编码,因此可以转换为整型,正确
B.方法定义为无返回值不可返回true,错误
C.方法定义为整型返回不可返回true,错误
D.参数类型b需要添加参数类型,错误
答案选A。
2019.07.13问题
集合——List、Set、Map
下列说法正确的是?
A.WeakMap继承自HashMap
B.HashSet继承自AbstractSet
C.LinkedList继承自List
D.AbstractSet继承自Set