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Programming Articles
Page 1579 of 2547
Java Program to use == operator to compare enums
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 −Examplepublic class Demo { enum Devices { LAPTOP, MOBILE, TABLET; } public static void main(String[] args) { Devices d1, d2, d3; d1 = Devices.LAPTOP; ...
Read MoreJava Program to check whether the character is ASCII 7 bit
To check whether the character is ASCII 7 bit or not, check whether given value’s ASCII value is less than 128 or not.Here, we have a character.char one = '-';Now, we have checked a condition with if-else for ASCII 7-bit character.if (c < 128) { System.out.println("Given value is ASCII 7 bit!"); } else { System.out.println("Given value is not an ASCII 7 bit!"); }The following is an example wherein we check a character for ASCII 7-bit.Examplepublic class Demo { public static void main(String []args) { char c = '-'; System.out.println("Given value = "+c); ...
Read MoreCalling class method through NULL class pointer in C++
A class method can be can be called using a NULL class pointer.Note − This is undefined behaviour and there is not guarantee about the execution of the program. The actual results depend on the compiler used.A program that demonstrates this is given as follows.Example#include using namespace std; class Example { public : void func() { cout func(); return 0; }OutputThe output of the above program is as follows.The function is called through Null class pointer.Now, let us understand the above program.The class Example contains a member function func(). This function displays "The ...
Read MorePython Text Sequence Types
In python the str object, handles the text or string type data. Strings are immutable. The strings are sequence of Unicode characters. We can use single quote, double quotes or triple quotes to define the string literals. ‘This is a string with single quote’ “Another Text with double quotes” ‘’’Text using three single quotes’’’ or “””Text using three double quotes””” We can use triple quotes to assign multiline strings in python. There is different string related functions. Some of the String methods are as follows − Sr.No. Operation/Functions & Description 1 s.capitalize() Convert first ...
Read MorePrivate Constructors and Singleton Classes in Java Programming
As we know the primary role of the constructor is to instantiate a class object now if we made the constructor as private then we restrict its calling to be only in defining a class and not in some other class. Now the singleton class in Java is defined as the class which restricts the instantiation of a class and ensure that only one instance of the class exists in the JVM. After first time if instantiate the singleton class the new variable also points to the first instance created. In order to create a singleton class we could use ...
Read MoreCreate BigInteger via string in Java
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 −Exampleimport 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
Read MoreCreate BigInteger via long type variable in Java
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 −Exampleimport 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
Read MorePrivate and final methods in Java Programming
In Java private methods are the methods having private access modifier and are restricted to be access in the defining class only and are not visible in their child class due to which are not eligible for overridden. However, we can define a method with the same name in the child class and could access in parent class.Like private methods final methods in Java are the methods having final non-access modifier instead of private and are again restricted to be accessed in the defining class only and are not visible in their child class due to which are not eligible ...
Read MoreCreate BigInteger from byte array in Java
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.Exampleimport 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
Read MoreRegex in Python to put spaces between words starting with capital letters
The problem we are trying to solve here is to convert CamelCase to separate out words. We can solve this directly using regexes by finding all occurrences of a capital letter in the given string and put a space before it. We can use the sub method from the re module.For example, for the input string −AReallyLongVariableNameInJavaWe should get the output −A Really Long Variable Name In JavaWe can use "[A-Z]" regex to find all uppercase letters, then replace them with space and that letter again. We can implement it using the re package as follows −Exampleimport re # ...
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