Java Articles - Page 571 of 745

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

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

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 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

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.Firstly, set a long value −Long l = 198L;Now, create a new object for BigInteger and pass the above value −BigInteger bInteger = new BigInteger(l);The following is an example −Example Live Demoimport java.math.BigInteger; public class Demo {    public static void main(String[] argv) throws Exception {       Long l = 198L;       BigInteger bInteger = BigInteger.valueOf(l);       System.out.println(bInteger);    } }Output198

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.Firstly, set a string −String str = "268787878787687";Now, create a new object for BigInteger and pass the above string −BigInteger bInteger = new BigInteger(str);The following is an example −Example Live Demoimport java.math.BigInteger; public class Demo {    public static void main(String[] argv) throws Exception {       String str = "268787878787687";       BigInteger bInteger = new BigInteger(str);       System.out.println(bInteger);    } }Output268787878787687

Enum in Java contains a fixed set of constants. They can have fields, constructors and method. It enhances type safety in Java.The following is an example wherein we are implementing Switch statement on Enumeration in Java −Example Live Demopublic class Demo {    public static void main(String[] args) {       Laptop l = Laptop.Inspiron;       switch(l){          case Inspiron:          System.out.println("Laptop for home and office use!");             break;          case XPS:           System.out.println("Laptop for the ultimate experience!");             break;          case Alienware:           System.out.println("Laptop for high-performance gaming");             break;       }    } } enum Laptop {       Inspiron, XPS, Alienware; }OutputLaptop for home and office use!

We can use the == operator to compare enums in Java.Let’s say we have the following enum.enum Devices {    LAPTOP, MOBILE, TABLET; }Here are some of the objects and we have assigned some values as well −Devices d1, d2, d3; d1 = Devices.LAPTOP; d2 = Devices.LAPTOP; d3 = Devices.TABLET;Let us now see an example wherein we will compare them using == operator −Example Live Demopublic class Demo {    enum Devices {       LAPTOP, MOBILE, TABLET;    }    public static void main(String[] args) {       Devices d1, d2, d3;       d1 = Devices.LAPTOP; ... Read More

To compare enumeration values, use the equals() method.Our Devices enum is having some objects with values assigned to them.Devices d1, d2, d3; d1 = Devices.LAPTOP; d2 = Devices.LAPTOP; d3 = Devices.TABLET;Let us compare them −if(d3.equals(Devices.TABLET)) System.out.println("Devices are same."); else System.out.println("Devices are different.");The following is an example −Example Live Demopublic class Demo {    enum Devices {       LAPTOP, MOBILE, TABLET;    }    public static void main(String[] args) {       Devices d1, d2, d3;       d1 = Devices.LAPTOP;       d2 = Devices.LAPTOP;       d3 = Devices.TABLET;       if(d1.equals(d2))   ... Read More

We have the Devices Enum with four constants.enum Devices { LAPTOP, MOBILE, TABLET, DESKTOP; }We have created some objects and assigned them with the constants.Let us compare them with both equals() and ==. Firstly, begin with equals() −if(d1.equals(d2)) System.out.println("Devices are the same."); else System.out.println("Devices are different.");Now, let us move forward and check for ==if(d1 == d3) System.out.println("Devices are the same."); else System.out.println("Devices are different.");The following is the final example demonstrating both equals() and == operator −Example Live Demopublic class Demo {    enum Devices {       LAPTOP, MOBILE, TABLET, DESKTOP;    }    public static void main(String[] args) { ... Read More