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BigInteger class provides operations for modular arithmetic, GCD calculation, primality testing, prime generation, bit manipulation, and a few other miscellaneous operations.Let’s say the following is our byte array −byte[] arr = new byte[] { 0x1, 0x00, 0x00 };We will now convert them to BigInteger −BigInteger bInteger = new BigInteger(arr);The following is an example that creates BigInteger from a byte array in Java.Example Live Demoimport java.math.BigInteger; public class Demo { public static void main(String[] argv) throws Exception { byte[] arr = new byte[] { 0x1, 0x00, 0x00 }; BigInteger bInteger = new BigInteger(arr); System.out.println(bInteger); } }Output65536
The java.math.BigInteger class provides operations analogues to all of Java's primitive integer operators and for all relevant methods from java.lang.Math.BigInteger class is used for big integer calculations which are outside the limit of the primitive data types. It provides operations for modular arithmetic, GCD calculation, primality testing, prime generation, bit manipulation, and a few other miscellaneous operations.The following is an example that displays how we can work with BigInteger values.Example Live Demoimport java.math.BigInteger; public class BigIntegerDemo { public static void main(String[] args) { BigInteger bi1, bi2, bi3; // assign values to bi1, bi2 ... Read More
BigInteger class is used for big integer calculations which are outside the limit of the primitive data types. It provides operations for modular arithmetic, GCD calculation, primality testing, prime generation, bit manipulation, and a few other miscellaneous operations.To multiply one BigInteger to another, use the BigInteger multiply() method.First, let us create some objects −BigInteger one, two, three; one = new BigInteger("2"); two = new BigInteger("8");Multiply the above and assign it to the third object −three = one.multiply(two);The following is an example −Example Live Demoimport java.math.*; public class BigIntegerDemo { public static void main(String[] args) { BigInteger one, ... Read More
Use the BigInteger subtract() method in Java to Subtract one BigInteger from another.First, let us create some objects −BigInteger one, two, three; one = new BigInteger("200"); two = new BigInteger("150");Subtract the above and assign it to the third object −three = one.subtract(two);The following is an example −Example Live Demoimport java.math.*; public class BigIntegerDemo { public static void main(String[] args) { BigInteger one, two, three; one = new BigInteger("200"); two = new BigInteger("150"); three = one.subtract(two); String res = one + " - " + two + " = " +three; System.out.println("Subtraction: " +res); } }OutputSubtraction: 200 - 150 = 50
Use the BigInteger divide() method in Java to divide one BigInteger from another.First, let us create some objects.BigInteger one, two, three; one = new BigInteger("200"); two = new BigInteger("100");Divide the above and assign it to the third object −three = one.divide(two);The following is an example −Example Live Demoimport java.math.*; public class BigIntegerDemo { public static void main(String[] args) { BigInteger one, two, three; one = new BigInteger("200"); two = new BigInteger("100"); // division three = one.divide(two); String res = one + " / " + two + " = " +three; System.out.println("Result: " +res); } }OutputResult: 200 / 100 = 2
Use the BigInteger negate() method in Java to negate a BigInteger.First, let us create an object −BigInteger one, two; one = new BigInteger("200");Negate the above and assign it to the second object −two = one.negate();The following is an example −Example Live Demoimport java.math.*; public class BigIntegerDemo { public static void main(String[] args) { BigInteger one, two; one = new BigInteger("200"); System.out.println("Actual Value: " +one); // negate two = one.negate(); System.out.println("Negated Value: " +two); } }OutputActual Value: 200 Negated Value: -200
Use the BigInteger pow() method in Java to calculate the power on a BigInteger.First, let us create some objects.BigInteger one, two; one = new BigInteger("5");Perform the power operation and assign it to the second object −// power operation two = one.pow(3);The following is an example −Example Live Demoimport java.math.*; public class BigIntegerDemo { public static void main(String[] args) { BigInteger one, two; one = new BigInteger("5"); System.out.println("Actual Value: " +one); // power operation two = one.pow(3); System.out.println("Result: " +two); } }OutputActual Value: 5 Negated Value: 125
BigInteger class is used for big integer calculations which are outside the limit of the primitive data types. It provides operations for modular arithmetic, GCD calculation, primality testing, prime generation, bit manipulation, and a few other miscellaneous operations.Let us work with the testBit() method in Java to perform Bitwise operation. The java.math.BigInteger.testBit(int n) returns true if and only if the designated bit is set −The following is an example −Example Live Demoimport java.math.*; public class BigIntegerDemo { public static void main(String[] args) { BigInteger one; Boolean two; one = new BigInteger("5"); ... Read More
To shift right in a BigInteger, use the shiftRight() method.The java.math.BigInteger.shiftRight(int n) returns a BigInteger whose value is (this >> n). Sign extension is performed. The shift distance, n, may be negative, in which case this method performs a left shift. It computes floor(this / 2n).The following is an example −Example Live Demoimport java.math.*; public class Demo { public static void main(String[] args) { BigInteger one; one = new BigInteger("25"); one = one.shiftRight(3); System.out.println("Result: " +one); } }OutputResult: 3
To set enum for days of the week, set them as constantsenum Days { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday }Now create objects and set the above constants −Days today = Days.Wednesday; Days holiday = Days.Sunday;The following is an example −Example Live Demopublic class Demo { enum Days { Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday } public static void main(String[] args) { Days today = Days.Wednesday; Days holiday = Days.Sunday; System.out.println("Today = " + today); System.out.println(holiday+ " is holiday"); } }OutputToday = Wednesday Sunday is holiday