java - Fast way to switch bits order? -

i have binary this

10011011 

my data store 10,01,10,11, want reorder this

11100110 

the data 11,10,01,10.this operation same byteorder convert in bits level.

any fast bitop way ?

currently, have decode 4 int merge one.

the fastest way might precompute table of values:

final int[] values = new int[256]; (int = 0; < 256; ++i) {     values[i] = (i & 0b1100_0000) >> 6                 | (i & 0b0011_0000) >> 2                 | (i & 0b0000_1100) << 2                 | (i & 0b0000_0011) << 6; } 

and use array lookups rather bit manipulation.

naturally, you'll want profile.