# Converting Between a BitSet and a Byte Array : Bitwise Operators « Operators « Java Tutorial

```import java.util.BitSet;

public class Main {
public static void main(String[] argv) throws Exception {
System.out.println(fromByteArray(new byte[]{1,2,3}));
}

// Returns a bitset containing the values in bytes.
public static BitSet fromByteArray(byte[] bytes) {
BitSet bits = new BitSet();
for (int i = 0; i < bytes.length * 8; i++) {
if ((bytes[bytes.length - i / 8 - 1] & (1 << (i % 8))) > 0) {
bits.set(i);
}
}
return bits;
}
}
//{0, 1, 9, 16}
```
 3.5.Bitwise Operators 3.5.1. The Bitwise Operators can be applied to the integer types, long, int, short, char, and byte. 3.5.2. The Bitwise Logical Operators 3.5.3. Bitwise AND (&) 3.5.4. Bitwise OR (|) 3.5.5. Bitwise XOR (^) 3.5.6. Left shift (<<) 3.5.7. Bitwise complement (~): inverts ones and zeros in a number 3.5.8. Demonstrate the bitwise logical operators 3.5.9. All bitwise operators in action 3.5.10. Bitwise Operator Assignments 3.5.11. The Left Shift 3.5.12. Left shifting as a quick way to multiply by 2 3.5.13. The Right Shift 3.5.14. The Unsigned Right Shift 3.5.15. Signed shift to the right 3.5.16. Unsigned shifting a byte value. 3.5.17. Convert a number to negative and back 3.5.18. Performing Bitwise Operations on a Bit Vector 3.5.19. Converting Between a BitSet and a Byte Array 3.5.20. Returns a byte array of at least length 1 3.5.21. Use bitwise operator to create hash code 3.5.22. Operations on bit-mapped fields. 3.5.23. Represents a collection of 64 boolean (on/off) flags.