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Articles on Trending Technologies
Technical articles with clear explanations and examples
Java Program to return the hexadecimal value of the supplied byte array
The following is the supplied byte array −byte[] b = new byte[]{'x', 'y', 'z'};We have created a custom method “display” here and passed the byte array value. The same method converts byte array to hex string −public static String display(byte[] b1){ StringBuilder strBuilder = new StringBuilder(); for(byte val : b1){ strBuilder.append(String.format("%02x", val&0xff)); } return strBuilder.toString(); }Let us see the entire example now −Examplepublic class Demo { public static void main(String args[]) { byte[] b = new byte[]{'x', 'y', 'z'}; ...
Read MoreApply modulus operator to floating-point values in Java
To apply modulus (%) operator to floating-point values in an effortless task. Let us see how.We have the following two values −double one = 9.7; double two = 1.2;Let us now apply the modulus operator −one % twoThe following is the complete example that displays the output as well −Examplepublic class Demo { public static void main(String args[]) { double one = 9.7; double two = 1.2; System.out.println( one % two ); } }Output0.09999999999999964
Read MoreEnable Assertions from the command line in Java
By default, assertions are disabled in Java. In order to enable them we use the following command −java -ea Example (or) java -enableassertions ExampleHere, Example is the name of the Java file.Let us see an example for generation of an assertion error by the JVM −Examplepublic class Example { public static void main(String[] args) { int age = 14; assert age >= 18 : "Cannot Vote"; System.out.println("The voter's age is " + age); } }OutputThe voter's age is 14
Read MoreC++ Program to Find Largest Number Among Three Numbers
The largest number among three numbers can be found using if statement multiple times. This is given in a program as follows −Example#include using namespace std; int main() { int a = 5 ,b = 1 ,c = 9; if(a>b) { if(a>c) cout
Read MoreConvert byte primitive type to Byte object in Java
To convert byte primitive type to Byte object, use the Byte constructor.Here is our byte primitive type.byte b = 100;Now let us convert it to Byte object.Byte res = new Byte(b);Let us see the complete example.Examplepublic class Demo { public static void main(String[] args) { byte b = 100; Byte res = new Byte(b); System.out.println(res); } }Output100
Read MoreDisplay Day Name of Week using Java Calendar
For using Calendar class, import the following package.import java.util.Calendar;Using the Calendar class, create an object.Calendar calendar = Calendar.getInstance();Now, create a string array of the day names.String[] days = new String[] { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };Display the day name.days[calendar.get(Calendar.DAY_OF_WEEK) - 1]The following is the final example.Exampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); System.out.println("Day: " + (calendar.get(Calendar.DATE))); System.out.println("Month: " + (calendar.get(Calendar.MONTH) + 1)); System.out.println("Year: " + (calendar.get(Calendar.YEAR))); String[] days = new String[] { ...
Read MoreJava Program to display Bit manipulation in Integer
Let’s say we have the following decimal number, which is binary 100100110.int dec = 294;To perform bit manipulation, let us count the number of 1 bits in it. We have used bitCount() method for this purpose.Integer.bitCount(dec);The following is an example to display bit manipulation in given Integer.Examplepublic class Demo { public static void main(String []args) { // binary 100100110 int dec = 294; System.out.println("Count of one bits = " + Integer.bitCount(dec)); } }OutputCount of one bits = 4
Read MoreJava program to print the initials of a name with last name in full
When the full name is provided, the initials of the name are printed with the last name is printed in full. An example of this is given as follows −Full name = Amy Thomas Initials with surname is = A. ThomasA program that demonstrates this is given as follows −Exampleimport java.util.*; public class Example { public static void main(String[] args) { String name = "John Matthew Adams"; System.out.println("The full name is: " + name); System.out.print("Initials with surname is: "); int len = name.length(); name ...
Read MorePrecision on a number format in Java
You can include a precision specifier to the following format specifiers −%f %e %g %sOn floating point, the number of decimal places is known.Let’s say we declared a Formatter object −Formatter f1 = new Formatter();Now, we want 3 decimal places. For that, use 1.3f −f1.format("%1.3f", 29292929.98765432);The above will return the number with 3 decimal places −29292929.988The following is the final example −Exampleimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f1, f2, f3; f1 = new Formatter(); f1.format("%1.3f", 29292929.98765432); System.out.println(f1); f2 = new Formatter(); f2.format("%1.7f", 29292929.98765432); System.out.println(f2); ...
Read MoreDisplay Month of Year using Java Calendar
For using Calendar class, import the following package.import java.util.Calendar;Using the Calendar class, create an object.Calendar calendar = Calendar.getInstance();Now, create a string array of the month names.String[] month = new String[] {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };Display the month name.month[calendar.get(Calendar.MONTH)]The following is an example.Exampleimport java.util.Calendar; public class Demo { public static void main(String[] args) { Calendar calendar = Calendar.getInstance(); String[] month = new String[] {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; System.out.println("Current Month = " + month[calendar.get(Calendar.MONTH)]); ...
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