Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Programming Articles
Page 1570 of 2547
Shift left in a BigInteger in Java
To shift left in a BigInteger, use the shiftLeft() method.The java.math.BigInteger.shiftLeft(int n) returns a BigInteger whose value is (this
Read MoreNarrowing Conversion in Java
Narrowing conversion is needed when you convert from a larger size type to a smaller size. This is for incompatible data types, wherein automatic conversions cannot be done.Let us see an example wherein we are converting long to integer using Narrowing Conversion.Examplepublic class Demo { public static void main(String[] args) { long longVal = 878; int intVal = (int) longVal; System.out.println("Long: "+longVal); System.out.println("Integer: "+intVal); } }OutputLong: 878 Integer: 878Let us see another example, wherein we are converting double to long using Narrowing Conversion.Examplepublic class Demo { public static void main(String[] args) { double doubleVal = 299.89; long longVal = (long)doubleVal; System.out.println("Double: "+doubleVal); ...
Read MoreDisplay the package name of a class in Java
The package for a class can be obtained using the java.lang.Class.getPackage() method with the help of the class loader of the class. If there is no package object created by the class loader of the class, then null is returned.A program that demonstrates this is given as follows −Exampleimport java.util.Date; public class Main { public static void main(String[] args) { Date d = new Date(); Package p = d.getClass().getPackage(); String pName = p.getName(); System.out.println("The package name is: " + pName); } }OutputThe package name is: java.utilNow ...
Read MoreHandling missing keys in Python dictionaries
In Python there is one container called the Dictionary. In the dictionaries, we can map keys to its value. Using dictionary the values can be accessed in constant time. But when the given keys are not present, it may occur some errors. In this section we will see how to handle these kind of errors. If we are trying to access missing keys, it may return errors like this. Example code country_dict = {'India' : 'IN', 'Australia' : 'AU', 'Brazil' : 'BR'} print(country_dict['Australia']) print(country_dict['Canada']) # This will return error Output AU --------------------------------------------------------------------------- KeyErrorTraceback (most recent call last) ...
Read MoreGenerate Random Long type numbers in Java
In order to generate Random long type numbers in Java, we use the nextLong() method of the java.util.Random class. This returns the next random long value from the random generator sequence.Declaration − The java.util.Random.nextLong() method is declared as follows −public long nextLong()Let us see a program to generate random long type numbers in Java −Exampleimport java.util.Random; public class Example { public static void main(String[] args) { Random rd = new Random(); // creating Random object System.out.println(rd.nextLong()); // displaying a random long value } }Output-4787108556148621714Note - The output may vary on Online compilers.
Read MoreJava Program to Match Dates
Firstly, we have considered the following two dates.SimpleDateFormat s = new SimpleDateFormat("yyyy-MM-dd"); Date d1 = s.parse("2018-10-15"); Date d2 = s.parse("2018-11-10");Now, use the compareTo() method to compare both the dates. The results are displayed on the basis of the return value.if (d1.compareTo(d2) > 0) { System.out.println("Date1 is after Date2!"); } else if (d1.compareTo(d2) < 0) { System.out.println("Date1 is before Date2!"); } else if (d1.compareTo(d2) == 0) { System.out.println("Date1 is equal to Date2!"); } else { System.out.println("How to get here?"); }Exampleimport java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class Demo ...
Read MoreDisplay two-digit year in Java
Use the ‘y’ date conversion character to display two-digit year.System.out.printf("Two-digit Year = %TY", d);Above, d is a date object −Date d = new Date();The following is an example −Exampleimport java.util.Date; import java.text.DateFormat; import java.text.SimpleDateFormat; public class Demo { public static void main(String[] args) throws Exception { Date d = new Date(); DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss a"); String format = dateFormat.format(d); System.out.println("Current date and time = " + format); System.out.printf("Four-digit Year = %TY", d); System.out.printf("Two-digit Year = %ty", d); ...
Read MoreWhat would getPackage() return for a class in unnamed package in Java?
The package for a class can be obtained using the java.lang.Class.getPackage() method with the help of the class loader of the class.The getPackage() method returns null for a class in unnamed package. A program that demonstrates this is given as follows −Exampleclass Class1 { public class Main { public static void main(String[] argv) throws Exception { Class c = Class1.class; System.out.println(c.getPackage()); } }OutputnullNow let us understand the above program.The getPackage() method is used to obtain the package for the class. However, the getPackage() method returns null for the class ...
Read MoreDisplay three-digit day of the year in Java
Use the ‘j’ date conversion character to display three-digit day of the year.System.out.printf("Three-digit Day of the Year: %tj/%Tj", d, d);Above, d is a date object −Date d = new Date();The following is an example −Exampleimport java.util.Date; import java.text.DateFormat; import java.text.SimpleDateFormat; public class Demo { public static void main(String[] args) throws Exception { Date d = new Date(); DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy hh:mm:ss a"); String format = dateFormat.format(d); System.out.println("Current date and time = " + format); System.out.printf("Four-digit Year = %TY", d); ...
Read MoreConvert string of time to time object in Java
Here is our string.String strTime = "20:15:40";Now, use the DateFormat to set the format for date.DateFormat dateFormat = new SimpleDateFormat("hh:mm:ss");Parse the string of time to time object.Date d = dateFormat.parse(strTime);The following is the complete example.Exampleimport java.text.DateFormat; import java.util.Date; import java.text.SimpleDateFormat; public class Demo { public static void main(String[] args) throws Exception { String strTime = "20:15:40"; DateFormat dateFormat = new SimpleDateFormat("hh:mm:ss"); Date d = dateFormat.parse(strTime); System.out.println("Resultant Date and Time = " + d); } }OutputResultant Date and Time = Thu Jan 01 20:15:40 UTC 1970
Read More