Java BigInteger Class | shiftLeft() Method with Example

BigInteger Class shiftLeft() method: Here, we are going to learn about the shiftLeft() method of BigInteger Class with its syntax and example.
Submitted by Preeti Jain, on May 11, 2020

BigInteger Class shiftLeft() method

  • shiftLeft() method is available in java.math package.
  • shiftLeft() method is used to shift the given number of bits towards the left side in this BigInteger.
  • shiftLeft() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • shiftLeft() method may throw an exception at the time of shifting bits.
    ArithmeticException: This exception may throw when the given parameter value holds Integer.MIN_VALUE.

Syntax:

    public BigInteger shiftLeft(int number);

Parameter(s):

  • int number – represents the value in bits and when it holds negative value it performs right shift instead of left.

Return value:

The return type of this method is BigInteger, it returns BigInteger that holds the value [(this BigInteger) << (number)].

Example:

// Java program to demonstrate the example // of BigInteger setBit(int pos) method of BigInteger import java.math.*; public class SetBitOfBI { public static void main(String args[]) { // Initialize a variable str String str = "10"; // Initialize a BigInteger object BigInteger b_int = new BigInteger(str); // Display b_int System.out.println("b_int: " + b_int); // Display Binary representation of str System.out.println("Binary Representation of 10: 1010 "); System.out.println(); // Here, this method setBit(int) method is used // to set the bit value from "0" to 1" at the // given indices in this BigInteger // b_int and the binary representation of b_int // is 1010 so the bit "1" is set at the given // indices (0) so the new binary representation // is 1011 i.e. 11 BigInteger set_bit = b_int.setBit(0); System.out.println("b_int.setBit(0): " + set_bit); System.out.println("Binary Representation of 11: 1011 "); } }

Output

b_int: 10
Binary Representation of 10: 1010 

b_int.setBit(0): 11
Binary Representation of 11: 1011 


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