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Articles by karthikeya Boyini
Page 71 of 143
C++ Program to find size of int, float, double and char in Your System
Data Types in C++There are many data types in C++ but the most frequently used are int, float, double and char. Some details about these data types are as follows −int - This is used for integer data types which normally require 4 bytes of memory space.float - This is used for storing single precision floating point values or decimal values. float variables normally require 4 bytes of memory space.double - This is used for storing double precision floating point values or decimal values. Double variables normally require 8 bytes of memory space.char - This is used for storing characters. ...
Read MoreJava Program to convert Date into milliseconds
Import the following package to work with Date class.import java.util.Date;No create a Date object.Date d = new Date();Let us convert the current date to milliseconds.d.getTime()The following is an example.Exampleimport java.util.Date; public class Demo { public static void main(String[] args) { Date d = new Date(); System.out.println("Date = " + d); System.out.println("Milliseconds since January 1, 1970, 00:00:00 GMT = " + d.getTime()); } }OutputDate = Mon Nov 19 06:30:11 UTC 2018 Milliseconds since January 1, 1970, 00:00:00 GMT = 1542609011369
Read MoreCHAR_BIT in C++
The CHAR_BIT is the number of bits in char. It is declared in “limits.h” header file in C++ language. It is of 8-bits per byte.Here is an example of CHAR_BIT in C++ language,Example#include using namespace std; int main() { int x = 28; int a = CHAR_BIT*sizeof(x); stack s; cout
Read MoreConvert short primitive type to Short object in Java
Let us first create a short primitive type and assign a value.short val = 30;Now, create a Short object and set the above short type to it.Short myShort = new Short(val);The following is the complete example to convert short primitive type to Short object using Short constructor.Examplepublic class Demo { public static void main(String []args) { short val = 30; Short myShort = new Short(val); System.out.println(myShort); } }Output30
Read MoreCeil and floor functions in C++
The ceil FunctionThe ceil function returns the smallest possible integer value which is equal to the value or greater than that. This function is declared in “cmath” header file in C++ language. It takes single value whoes ceil value is to be calculated. The datatype of variable should be double/float/long double only.Here is the syntax of ceil function in C++ language,double ceil(double x); float ceil(float x);Here is an example of ceil function in C++ language,Example#include #include using namespace std; int main() { float var = 1234.25; float res; res = ceil(var); cout
Read MoreCheck whether a NavigableMap empty or not in Java
The isEmpty() method is used in Java to check whether a NavigableMap is empty or not.First, create a NavigableMap and add elements to it −NavigableMap n = new TreeMap(); n.put(5, "Tom"); n.put(9, "John"); n.put(14, "Jamie"); n.put(1, "Tim"); n.put(4, "Jackie"); n.put(15, "Kurt"); n.put(19, "Tiger"); n.put(24, "Jacob");Now, check whether the Map is empty or not −System.out.println("Map is empty? " + n.isEmpty());The following is an example to implement isEmpty() method and check whether the Map is empty −Exampleimport java.util.*; public class Demo { public static void main(String[] args) { NavigableMap n = new TreeMap(); n.put(5, "Tom"); ...
Read MoreGet Day Number of Week in Java
To get the day of the week, use Calendar.DAY_OF_WEEK.Firstly, declare a calendar object and get the current date and time.Calendar calendar = Calendar.getInstance(); System.out.println(calendar.getTime().toString());Now, fetch the day of the week in an integer variable.int day = calendar.get(Calendar.DAY_OF_WEEK);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(calendar.getTime().toString()); int day = calendar.get(Calendar.DAY_OF_WEEK); System.out.println("Day: " + day); int hour = calendar.get(Calendar.HOUR_OF_DAY); System.out.println("Hour: " + hour); int minute = calendar.get(Calendar.MINUTE); ...
Read MoreJava 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 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 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); ...
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