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

The key principle is that the type and value of a Java expression is independent of how it is being used. 11453115051 is an over-large int literal regardless of subsequent casting or being in a long[] initializer. — Patricia Shanahan
– Patricia Shanahan, Commented Nov 24, 2013 at 14:00

Masudul · Accepted Answer · 2016-04-29 09:08:57Z

28

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).

edited Apr 29, 2016 at 9:08

answered Nov 24, 2013 at 13:52

Masudul

22k5 gold badges45 silver badges60 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Alexis C. Over a year ago

@Yetti You seems to be new here. Don't forget to accept the answer if it has helped you and solved your problem.

quasit · Accepted Answer · 2013-11-24 14:00:15Z

4

Have you tried something like this?

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};

answered Nov 24, 2013 at 14:00

quasit

931 gold badge1 silver badge4 bronze badges

Collectives™ on Stack Overflow

declaring long[] array in java

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related