java.lang.Long rotateLeft(long i, int distance)
Description
Note that left rotation with a negative distance is equivalent to right rotation: rotateLeft(val, -distance) == rotateRight(val, distance). Note also that rotation by any multiple of 64 is a no-op, so all but the last six bits of the rotation distance can be ignored, even if the distance is negative: rotateLeft(val, distance) == rotateLeft(val, distance & 0x3F).
Make a note that the rotateLeft() method of Long class is static thus it should be accessed statically which means the we would be calling this method in this format:
Long.rotateLeft(method args)
Non static method is usually called by just declaring method_name(argument) however in this case since the method is static, it should be called by appending the class name as suffix. We will be encountering a compilation problem if we call the java rotateLeft method non statically.
Method Syntax
public static int rotateLeft(long i, int distance)
Method Argument
| Data Type | Parameter | Description |
|---|---|---|
| long | i | the value whose bits are to be rotated left |
| int | distance | the number of bit positions to rotate left |
Method Returns
The rotateLeft(long i, int distance) method of Long class returns the value obtained by rotating the two’s complement binary representation of the specified long value left by the specified number of bits.
Compatibility
Requires Java 1.5 and up
Java Long rotateLeft(long i, int distance) Example
Below is a simple java example on the usage of rotateLeft(long i, int distance) method of Long class.
package com.javatutorialhq.java.examples;
import java.util.Scanner;
/*
* This example source code demonstrates the use of
* rotateLeft(long i, int distance) method of Long class
*/
public class LongRotateLeftExample {
public static void main(String[] args) {
// Ask for user input
System.out.print("Enter a value:");
// declare a scanner object to read the user input
Scanner s = new Scanner(System.in);
// assign the input to a variable
long value = s.nextLong();
System.out.print("Enter the distance you "
+ "want to rotate the bits:");
int distance = s.nextInt();
// get the the value obtained by rotating the two's complement binary
// representation of the specified long value left by the specified
// number of bits.
long result = Long.rotateLeft(value, distance);
// print the result
System.out.println("Result:" + result);
// close the scanner object
s.close();
}
}
Sample Output
Below is the sample output when you run the above example.
