# Shift operator in java

Let’s learn what is shift operator java?

## Shift operator in java

A shift operator basically used to perform bit manipulation on a number by shifting bits of first operand right/left.

• Signed left shift operator or bitwise left shift operator (<<)
• Signed right shift operator or bitwise right shift operator (>>)
• Unsigned right shift operator or bitwise zero fill right shift operator (>>>)

Signed left shift operator (<<)

Signed left shift operator shifts bits of the number to left to a specified number of positions. For example b << 2 means to shift bits of b towards left 2 positions.

Consider an example 9 << 2. Here we are using bitwise left shift operator 9 by 2. So the binary format of 9 is 1 0 0 1.

Now if we apply bitwise left shift operator to above binary number, left shift operator shifts this number by 2 bits.

Here shifting by 2 bits means; we have 1 0 0 1 it adds or appends two more zeros. That is 1 0 0 1 0 0 = 36. Let’s see java program.

```public class LeftShiftOperatorDemo
{
public static void main(String[] args)
{
int b = 9;
System.out.println((b << 2));
}
}
```

Output:

36

### Signed right shift (>>)

Signed right shift operator shifts bits of the number to right to a specified number of positions. For example b >> 2 means to shift bits of b towards right 2 positions.

Consider an example 9 >> 2. Here we are using bitwise right shift operator 9 by 2. So the binary format of 9 is 1 0 0 1.

Now if we apply bitwise right shift operator to above binary number, right shift operator drops/removes 2 bits.

Here removing 2 bits means; we have 1 0 0 1 it removes 0 and 1. That is 1 0 = 2. Let’s see java program.

```public class RightShiftOperatorDemo
{
public static void main(String[] args)
{
int b = 9;
System.out.println(b >> 2);
}
}
```

Output:

2

Unsigned right shift operator or bitwise zero fill right shift operator (>>>)

Bitwise zero fill right shift operator shifts bits of the number to right to a specified number of positions. For example b >>> 2 means to shift bits of b towards right 2 positions.

Bitwise zero fill right shift operator is same as signed right shift operator. Bitwise zero fill right shift operator can be applied to both positive and negative number; output always be a positive number. Now let’s see java program.

```public class UnsignedRightShiftDemo
{
public static void main(String[] args)
{
int a = 9;
int b = -1;
System.out.println(a >>> 2);
System.out.println(b >>> 10);
}
}
```

Output:

2
4194303

Also read – polymorphism in java