declaring long[] array in java

Question

Can anyone tell me why cant i declare array like this?

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

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.

Any ideas?

Thanks in advance

Answer 1

Plain number is considered as int in java. Append L which are bigger than Integer.MAX_VALUE to convert long.

long[] powers = {..., 2863245995L, 11453115051L, ...};

According to docs

An integer literal is of type long if it is suffixed with an ASCII letter L or l (ell); otherwise it is of type int.

The suffix L is preferred, because the letter l (ell) is often hard to distinguish from the digit 1 (one).