Java Integer rotateLeft() Method

The rotateLeft() method of Java Integer class returns the value obtained by rotating the two's complement binary representation of the specified int value left by the specified number of bits. (Bits shifted out of the left hand, or high-order).

Bit shifting is a bitwise operation which is performed on all the bits of a binary value by moving the bits to a definite number of places towards left or right.

Java has a single Logical left shift operator (<<).

Explanation:

Syntax:

Following is the declaration of rotateLeft () method:

Parameter:

Returns:

The rotateLeft () method returns the value obtained by rotating the two's complement binary representation of the specified int value left by the specified number of bits.

Exceptions:

NA

Compatibility Version:

Java 1.5 and above

Example 1

Output:

40

Example 2

Output:

Binary equivalent: 10000
Value after left rotation: 128
New Binary value after Rotated Left: 10000000

Example 3

Output:

Enter the Number: 16
Value: 16
Binary equivalent: 10000
Value: 32
Binary equivalent: 100000
Value: 128
Binary equivalent: 10000000

Example 4

Output:

Value: -12
Value: -23
Value: -89