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Programming Articles
Page 2333 of 2547
Different Methods to find Prime Number in Python
First we need to know what a prime number is.A prime number always a positive integer number and divisible by exactly 2 integers (1 and the number itself), 1 is not a prime number.Now we shall discuss some methods to find Prime Number.Method1Using For loopsExampledef primemethod1(number): # Initialize a list my_primes = [] for pr in range(2, number): isPrime = True for i in range(2, pr): if pr % i == 0: isPrime = False if isPrime: my_primes.append(pr) print(my_primes) primemethod1(50)Output[2, 3, 5, 7, 11, ...
Read MoreExplain the ODBC architecture?
ODBC architecture consists of the following components.Application: An application which communicates with the databases using ODBC functions is an ODBC application.ODBC driver manager: The ODBC diver manager manages the underlying drivers in an application. Whenever an application calls a function of ODBC API to communicate with a database, the driver manager accepts those function calls and passes them to the ODBC driver. When the driver retrieves the results from the database the driver manager accepts the results from the driver and returns it back to the application.ODBC driver: The ODBC driver accepts the application function calls from the driver manager ...
Read MoreRead integers from console in Java
To read integers from console, use Scanner class.Scanner myInput = new Scanner( System.in );Allow a use to add an integer using the nextInt() method.System.out.print( "Enter first integer: " ); int a = myInput.nextInt();In the same way, take another input in a new variable.System.out.print( "Enter second integer: " ); Int b = myInput.nextInt();Let us see the complete example.Exampleimport java.util.Scanner; public class Demo { public static void main( String args[] ) { Scanner myInput = new Scanner( System.in ); int a; int b; int sum; System.out.print( ...
Read MoreCheck if the String contains only unicode letters or digits in Java
To check whether a String contains only unicode letters or digits in Java, we use the isLetterOrDigit() method and charAt() method with decision-making statements.The isLetterOrDigit(char ch) method determines whether the specific character (Unicode ch) is either a letter or a digit. It returns a boolean value, either true or false.Declaration −The java.lang.Character.isLetter() method is declared as follows −public static boolean isLetter(char ch)The charAt() method returns a character value at a given index. It belongs to the String class in Java. The index must be between 0 to length()-1.Declaration −The java.lang.String.charAt() method is declared as follows −public char charAt(int index)Let us ...
Read MoreCheck if the String contains only unicode letters in Java
In order to check if a String has only Unicode letters in Java, we use the isDigit() and charAt() methods with decision-making statements.The isLetter(int codePoint) method determines whether the specific character (Unicode codePoint) is a letter. It returns a boolean value, either true or false.Declaration −The java.lang.Character.isLetter() method is declared as follows −public static boolean isLetter(int codePoint)Here, the parameter codePoint represents the character to be checked.The charAt() method returns a character value at a given index. It belongs to the String class in Java. The index must be between 0 to length()-1.Declaration −The java.lang.String.charAt() method is declared as follows −public ...
Read MoreTimer Class in Java
The Timer Class in Java is a facility for threads to plan tasks for future execution in a background thread. Tasks may be executed a single time or multiple times. The Timer class is thread-safe i.e. the threads of the class do not require external synchronization and can share a single Timer object. A point to be noted is that all constructors start a Timer thread.The Timer Class in Java came into existence since JDK 1.3. This class ascends up to large numbers of concurrently scheduled tasks. Internally, it uses a binary heap in the memory to represent its task ...
Read MoreRemove all cancelled tasks from the timer's task queue in Java
One of the methods of the Timer class is the int purge() method. The purge() method removes all the canceled tasks from the timer’s task queue. Invoking this method does not affect the behavior of the timer, rather it eliminates references to the canceled tasks from the queue. The purge() method came into existence since JDK 1.5.The purge() method acts as a medium for space-time tradeoff where it trades time for space. More specifically, the time complexity of the method is proportional to n + c log n, where n is the number of tasks in the queue and c ...
Read MorePython program to check if a string is palindrome or not
Given a string, our task is to check weather this string is palindrome or not.AlgorithmStep1: Enter string as an input. Step2: Using string slicing we reverse the string and compare it back to the original string. Step3: Then display the result.Example codemy_string=input("Enter string:") if(my_string==my_string[::-1]): print("The string is a palindrome") else: print("The string isn't a palindrome")OutputEnter string:madam The string is a palindrome Enter string:python The string isn't a palindrome
Read MoreDeque in Python
The Deque is basically a generalization of stack and queue structure, where it is initialized from left to right. It uses the list object to create a deque.It provides O(1) time complexity for popping and appending.The Dequeis a standard library class, which is located in the collections module.To use it at first we need to import it the collections standard library module.import collectionsIn this section we will see some functions of the Deque classThe Appending functions on DequeThere are two different types of append. The append() method is used to add elements at the right end of the queue, and ...
Read MoreDoes JVM creates object of Main class in Java?
As we know that Java needs main() method to be static in the public class to make it executable. The prime reason for this requirement is to make JVM enable to call the main() method without creating an object. That simply means that JVM does not create the object of the Main class which contains the main() method. To justify the same, we can make the Main class containing the main method as abstract and program still runs.Following example showcases the same. Here we have made the main class abstract.Exampleabstract public class Tester { public static void main(String args[]) ...
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