question: @ Override public final void writeLong ( long v ) throws IOException { work [ 0 ] = ( byte ) v ; work [ 1 ] = ( byte ) ( v > > 8 ) ; work [ 2 ] = ( byte ) ( v > > 16 ) ; work [ 3 ] = ( byte ) ( v > > 24 ) ; work [ 4 ] = ( byte ) ( v > > 32 ) ; work [ 5 ] = ( byte ) ( v > > 40 ) ; work [ 6 ] = ( byte ) ( v > > 48 ) ; work [ 7 ] = ( byte ) ( v > > 56 ) ; dis . write ( work , 0 , 8 ) ; }
target:  Write a long, 64-bits. like DataOutputStream.writeLong.