java.math.BigInteger shiftLeft(int n)
Description
floor(this * 2n).)
Let’s take a for example a BigInteger 12 which is equivalent to binary 1100. So if we have a value n=1, then the binary 1100 shifted to the left by 1 would become 11000. The equivalent of 11000 is 24 which be the returned value of the method shiftLeft().
Notes:
- this method is related to shiftRight().
Method Syntax
public BigInteger shiftLeft(int n)
Method Argument
| Data Type | Parameter | Description |
|---|---|---|
| int | n | index of bit to shift. |
Method Returns
The flipBit() method this << n
Compatibility
Requires Java 1.1 and up
Java BigInteger shiftLeft(int n) Example
Below is a java code demonstrates the use of shiftLeft(int n) method of BigInteger class. The example presented might be simple however it shows the behavior of the shiftLeft(int n) method.
package com.javatutorialhq.java.examples;
import java.math.BigInteger;
import java.util.Scanner;
/*
* A java example source code to demonstrate
* the use of shiftLeft(int n) method of BigInteger class
*/
public class BigIntegerShiftLeftExample {
public static void main(String[] args) {
// initialize a BigInteger object
BigInteger val1 = new BigInteger("17");
/*
* Note: 17 in binary is 10001
*/
// get user input
System.out.print("Enter the shift distance:");
Scanner s = new Scanner(System.in);
String input = s.nextLine();
s.close();
/*
* convert the input to Integer unboxing feature will be used to
* transform Integer to primitive int
*/
Integer inputBitNumber = Integer.parseInt(input);
// get the new BigInteger
BigInteger result = val1.shiftLeft(inputBitNumber);
System.out.println("Result of the operation:" + result);
}
}
This example is a lot simpler than it looks. The first part is the declaration of a BigInteger. User are then asked to provide the shift distance. We then shifted the BigInteger object to the left with the specified shift distance. Result is printed at the end.
Sample Output
Below is the sample output when you run the above example.
