Returns 16 bits from the long number.

     
/*
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//package org.ancora.SharedLibrary;

/**
 * Methods for bit manipulation.
 *
 * @author Joao Bispo
 */
public class Util{
  private static final long MASK_16_BITS = 0xFFFFL;
     private static final int MASK_BIT_1 = 0x1;
     /**
      * Returns 16 bits from the long number.
      * 
      * @param data
      * @param offset one of 0 to 3
      * @return
      */
     public static int get16BitsAligned(long data, int offset) {
        // Normalize offset
        offset = offset%4;
        //System.out.println("offset:"+offset);
        // Align the mask
        long mask = MASK_16_BITS << 16*offset;
        //System.out.println("Mask:"+Long.toHexString(mask));
        //System.out.println("Data:"+Long.toHexString(data));

        // Get the bits
        long result = data & mask;

        // Put bits in position
        return (int) (result >>> (16*offset));
     }
}

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Returns 16 bits from the long number. : Binary Bit « Language Basics « Java

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