Bit Array in Java - Sanfoundry

This Java program is to Implement Bit Array. A bit array (also known as bitmap, bitset, bit string, or bit vector) is an array data structure that compactly stores bits. It can be used to implement a simple set data structure. A bit array is effective at exploiting bit-level parallelism in hardware to perform operations quickly.

Here is the source code of the Java program to implement bit array. The Java program is successfully compiled and run on a Linux system. The program output is also shown below.

```
import java.util.BitSet;
```
```
 
```
```
public class BitArray
```
```
{
```
```
    private BitSet bits;
```
```
 
```
```
    public BitArray(String bits)
```
```
    {
```
```
        this.bits = fromString(bits);
```
```
    }
```
```
 
```
```
    private BitSet getBitSet()
```
```
    {
```
```
        return bits;
```
```
    }
```
```
 
```

    private void setBitSet(BitSet bitSet )

```
    {
```
```
        bits = bitSet;
```
```
    }
```
```
 
```

    public BitArray and(BitArray bitarray)

```
    {
```

        BitSet bits1 = this.getBitSet();

        BitSet bits2 = bitarray.getBitSet();

```
 
```
```
        bits1.and(bits2);
```
```
        this.setBitSet(bits1);
```
```
        return this;
```
```
    }
```
```
 
```

    public BitArray or(BitArray bitarray)

```
    {
```

        BitSet bits1 = this.getBitSet();

        BitSet bits2 = bitarray.getBitSet();

```
        bits1.or(bits2);
```
```
        this.setBitSet(bits1);
```
```
        return this;
```
```
    }
```
```
 
```

    private BitSet fromString(String bit)

```
    {
```

        return BitSet.valueOf(new long[] { Long.parseLong(bit, 2) });

```
    }
```
```
 
```
```
    public String toString()
```
```
    {
```

        return Long.toString(bits.toLongArray()[0], 2);

```
    }
```
```
 
```

    public static void main (String...arg)

```
    {
```

        BitArray array1 = new BitArray("1010");

        BitArray array2 = new BitArray("1001");

        BitArray array3 = new BitArray("1100");

```
 
```

        System.out.println("The BitArray Are");

        System.out.println("First :" + array1);

        System.out.println("Second :" +array2);

        System.out.println("Third : " + array3);

```
 
```

        System.out.println("First AND Second");

        System.out.println(array1.and(array2));

```
 
```

        System.out.println("Second OR Third");

        System.out.println(array2.or(array3));

```
    }	
```
```
}
```

$javac BitArray.java
$java BitArray
 
The BitArray Are
First :1010
Second :1001
Third : 1100
First AND Second
1000
Second OR Third
1101

Sanfoundry Global Education & Learning Series – 1000 Java Programs.

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