Java Articles - Page 341 of 440

Here, we are using the DecimalFormat class in Java to format integer value, which is the java.text.DecimalFormat package.Let us take the following format: DecimalFormat("0.######E0") and use the format() method for this purpose −new DecimalFormat("0.#####E0").format(5089) new DecimalFormat("0.#####E0").format(608)Since, we have used DecimalFormat class in Java, therefore importing the following package in a must −import java.text.DecimalFormat;The following is an example −Example Live Demoimport java.text.DecimalFormat; public class Demo { public static void main(String[] argv) throws Exception { System.out.println(new DecimalFormat("0.#####E0").format(387979)); System.out.println(new DecimalFormat("0.#####E0").format(29797)); System.out.println(new DecimalFormat("0.#####E0").format(49788)); ... Read More

Firstly, set the double values −double d1 = 1.39876; double d2 = 2.39876; double d3 = 0.66920;Now, format the double values with new DecimalFormat("0.#####E0") −System.out.println(new DecimalFormat("0.#####E0").format(d1)); System.out.println(new DecimalFormat("0.#####E0").format(d2)); System.out.println(new DecimalFormat("0.#####E0").format(d3));The following is an example −Example Live Demoimport java.text.DecimalFormat; public class Demo { public static void main(String[] argv) throws Exception { double d1 = 1.39876; double d2 = 2.39876; double d3 = 0.66920; System.out.println(new DecimalFormat("0.#####E0").format(d1)); System.out.println(new DecimalFormat("0.#####E0").format(d2)); ... Read More

DecimalFormat is a concrete subclass of NumberFormat that formats decimal numbers.Let us set DecimalFormat(abc#) first −Format f = new DecimalFormat("'abc'#");Now, we will format a number and display the result in a string using the format() method −String res = f.format(-3968.7878);Since, we have used both Format and DecimalFormat class in Java, therefore importing the following packages in a must −import java.text.DecimalFormat; import java.text.Format;The following the complete example −Example Live Demoimport java.text.DecimalFormat; import java.text.Format; public class Demo { public static void main(String[] argv) throws Exception { Format f = new DecimalFormat("'abc'#"); ... Read More

The truncate BigDecimal value in Java, try the following code.Here, we have taken two BigDecimla values and set the round mode for truncating the decimal values −Example Live Demoimport java.math.BigDecimal; public class Demo { public static void main(String[] argv) throws Exception { int decPlaces1 = 3; int decPlaces2 = 5; BigDecimal val1 = new BigDecimal("37578975587.876876989"); BigDecimal val2 = new BigDecimal("62567875598.976876569"); System.out.println("Value 1 : "+val1); ... Read More

We have the following BigDecimal value −BigDecimal val1 = new BigDecimal("37578975587.876876989");We have set the decimal place to be −int decPlaces1 = 3;Now, we will use the ROUND_DOWN field to set the rounding mode to round towards zero −// ROUND_DOWN val1 = val1.setScale(decPlaces1, BigDecimal.ROUND_DOWN); String str1 = val1.toString(); System.out.println("Result = "+str1);To set decimal place of a BigDecimal value in Java, try the following code −Example Live Demoimport java.math.BigDecimal; public class Demo { public static void main(String[] argv) throws Exception { int decPlaces1 = 3; int decPlaces2 = ... Read More

Let us see how we can create BigDecimal values via string. Here, we have set string as a parameter to the BigDecimal constructor.BigDecimal val1 = new BigDecimal("375789755.345778656"); BigDecimal val2 = new BigDecimal("525678755.155778656");We can also perform mathematical operations on it −val2 = val2.subtract(val1);The following is an example −Example Live Demoimport java.math.BigDecimal; public class Demo { public static void main(String[] argv) throws Exception { BigDecimal val1 = new BigDecimal("375789755.345778656"); BigDecimal val2 = new BigDecimal("525678755.155778656"); System.out.println("Value 1 : "+val1); System.out.println("Value 2 : "+val2); val2 = val2.subtract(val1); System.out.println("Result (Subtraction) = "+val2); } }OutputValue 1 : 375789755.345778656 Value 2 : 525678755.155778656 Result (Subtraction) = 149888999.810000000

TheBigInteger.isProbablePrime(int certainty) returns true if this BigInteger is probably prime, false if it's definitely composite. If certainty is ≤ 0, true is returned.Here, the “certainty” parameter is a measure of the uncertainty that the caller is willing to tolerate: if the call returns true the probability that this BigInteger is prime exceeds (1 - 1/2certainty). The execution time of this method is proportional to the value of this parameter.The following is an example −Example Live Demoimport java.math.BigInteger; public class Demo { public static void main(String[] argv) throws Exception { // create 3 ... Read More

First, set the BigInteger object with binary.BigInteger val = new BigInteger("100000000110001100000", 2);Now, use the toByteArray() method.byte[] byteArr = val.toByteArray();The following is an example −Example Live Demoimport java.math.BigInteger; public class Demo { public static void main(String[] argv) throws Exception { BigInteger val = new BigInteger("100000000110001100000", 2); byte[] byteArr = val.toByteArray(); for (int i = 0; i < byteArr.length; i++) { System.out.format("0x%02X", byteArr[i]); } } }Output0x10 0x0C 0x60

Let us apply the following operations on BigInteger using the in-built methods in Java.Addition: add() method Subtraction: subtract() method Multiplication: multiply() method Division: divide() methodLet us create three BigInteger objects.BigInteger one = new BigInteger("98765432123456789"); BigInteger two = new BigInteger("94353687526754387"); BigInteger three = new BigInteger("96489687526737667");Apply mathematical operations on them.one = one.add(two); System.out.println("Addition Operation = " + one); one = one.multiply(two); System.out.println("Multiplication Operation = " + one);The following is an example −Example Live Demoimport java.math.BigInteger; public class Main { public static void main(String[] args) { BigInteger one = new BigInteger("98765432123456789"); ... Read More

First, create a BigInteger.BigInteger val = new BigInteger("198");Let us convert it to Binary, with radix as 2.val.toString(2);Convert it to Octal, with radix as 8.val.toString(8);Convert it to HexaDecimal, with radix as 16.val.toString(16);The following is an example −Example Live Demoimport java.math.BigInteger; public class Main { public static void main(String[] args) { BigInteger val = new BigInteger("198"); System.out.println("Value: " + val); // binary System.out.println("Converted to Binary: " + val.toString(2)); // octal ... Read More