在java中声明long[]数组
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declaring long[] array in java
提问by Yetti
Can anyone tell me why cant i declare array like this?
谁能告诉我为什么我不能像这样声明数组？
long[] powers = { 0, 0, 1, 7, 35, 155, 651, 2667, 10795, 43435,
174251, 698027, 2794155, 11180715, 44731051, 178940587,
715795115, 2863245995, 11453115051, 45812722347, 183251413675,
733006703275, 2932028910251, 11728119835307, 46912487729835,
187649967696555, 750599904340651, 3002399684471467};
Compiler says that the literal of type int is out of range. I also tried to to cast it to long like this
编译器说 int 类型的文字超出范围。我也试过像这样把它投射到很长的时间
long[] powers = { 0, 0, 1, 7, 35, 155, 651, 2667, 10795, 43435,
174251, 698027, 2794155, 11180715, 44731051, 178940587,
715795115, (long)2863245995, (long)11453115051, (long)45812722347, etc ...
but nothing changed also tried someting like this Long.valueOf(x)where x is number whitch compiler has problem with.
但没有任何改变也尝试过这样的事情Long.valueOf(x)，其中 x 是编译器有问题的数字。
Any ideas?
有任何想法吗？
Thanks in advance
提前致谢
采纳答案by Masudul
Plain number is considered as intin java. Append Lwhich are bigger than Integer.MAX_VALUEto convert long.
纯数字被认为是int在java中。附加L大于Integer.MAX_VALUE转换的long。
long[] powers = {..., 2863245995L, 11453115051L, ...};
According to docs
根据文档
An integer literal is of type
longif it is suffixed with an ASCII letter L or l (ell); otherwise it is of typeint.The suffix L is preferred, because the letter l (ell) is often hard to distinguish from the digit 1 (one).
如果一个整数字面量
long以 ASCII 字母 L 或 l (ell) 为后缀，则它属于类型；否则它是类型int。后缀 L 是首选，因为字母 l (ell) 通常很难与数字 1 (one) 区分开来。
回答by quasit
Have you tried something like this?
你有没有尝试过这样的事情？
long[] powers = { 0, 0, 1, 7, 35, 155, 651, 2667, 10795, 43435,
174251, 698027, 2794155, 11180715, 44731051, 178940587,
715795115L, 2863245995L, 11453115051L, 45812722347L, 183251413675L,
733006703275L, 2932028910251L, 11728119835307L, 46912487729835L,
187649967696555L, 750599904340651L, 3002399684471467L};
