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In Java, HashSet is a class which implements Set Interface. HashSet is a collection of unique elements which doesn’t store or allow us to store duplicate elements. In this section, we will be discussing about different approaches in java to find the first element and last element of a HashSet using Java programming Language. The HashSet class in java is implemented using a hash table. It uses hash code to retrieve data quickly from the table in HashSet, the order of elements is not preserved i.e., it doesn’t store the elements in the order in which we add elements ... Read More
What is the Full Form of JAVA? The full form of Java is "Just Another Virtual Accelerator". Java is not an abbreviation but some programmers made a full form. Basically, Java doesn’t have any full form or special meaning. This full form is used jokingly by the programmers. J Just A Another V Virtual A Accelerator Related Links Some of the related topics, you may like to read: Overview of Java programming language Features of Java programming language
File is collection of records or is a place on hard disk, where data is stored permanently.Operations on filesThe operations on files in C programming language are as follows −Naming the fileOpening the fileReading from the fileWriting into the fileClosing the fileSyntaxThe syntax for opening a file is as follows −FILE *File pointer;For example, FILE * fptr;The syntax for naming a file is as follows −File pointer = fopen ("File name", "mode");For example, fptr = fopen ("sample.txt", "r"); FILE *fp; fp = fopen ("sample.txt", "w");fgets( ) and fputs( ) functions fgets() is used for reading a string from a file.The ... Read More
Stack is a linear data structure, where data is inserted and removed only at one end.AlgorithmsGiven below is an algorithm for Push ( ) −Check for stack overflow.if (top = = n-1) printf("stack over flow");Otherwise, insert an element into the stack.top ++ a[top] = itemGiven below is an algorithm for Pop ( ) −Check for stack underflow.if (top = = -1) printf("stack under flow");Otherwise, delete an element from the stack.item = a[top] top --Given below is an algorithm for Display ( ) −if (top == -1) printf ("stack is empty");Otherwise, follow the below mentioned algorithm.for (i=0; i
Characters that are neither alphabetical nor numeric are known as special characters. Special characters are essentially all unreadable characters, including punctuation, accent, and symbol marks. Remove any special characters from the string to make it easier to read and understand. Before we jump into the article let’s have a quick view on the regex expression in JavaScript. Regex expression in JavaScript Regular expressions are patterns that can be used to match character combinations in strings. Regular expressions are objects in JavaScript. These patterns can be used with the exec() and test() methods of RegExp as well as the match(), matchAll(), ... Read More
In this article, we will understand how to print alphabets from A to Z or a to z in Java. This is accomplished using a simple for loop.Below is a demonstration of the same −InputSuppose our input is −A to ZOutputThe desired output would be −A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AlgorithmStep1- Start Step 2- Declare a character: my_temp Step 3- Run a for loop from A to Z and print the values using the increment operator Step 4- Display ... Read More
JavaScript Get href Value is a useful tool for web developers and designers who need to quickly access the value of an HTML element's href attribute. This article will provide step-by-step instructions on how to use JavaScript to get the value of an href attribute on a webpage, as well as some tips and tricks for getting the most out of this powerful feature. The ability to quickly obtain the values from an HTML element's attributes can help make development faster and more efficient, so let's get started! The value of the href attribute in JavaScript is a URL ... Read More
When we enter the coding world there are various mathematical operations that we learn to do through programming languages. We are expected to begin our coding journey with basic mathematical operations like adding, subtracting, multiplying and dividing. To evaluate the sum of two numbers, we use the '+' operator. However, Java also provides other approaches for adding two numbers. This article aims to explore the possible ways to add the two numbers in Java. To add the two numbers in Java, we are going to use the following approaches − By taking input of operands from user By ... Read More
To convert an integer to binary, use the Integer.toBinaryString() method in Java.Let’s say the following is the integer we want to convert.int val = 999;Converting the above integer to binary.Integer.toBinaryString(val)Example Live Demopublic class Demo { public static void main(String[] args) { int val = 999; // integer System.out.println("Integer: "+val); // binary System.out.println("Binary = " + Integer.toBinaryString(val)); } }OutputInteger: 999 Binary = 1111100111
To convert String to Boolean, use the parseBoolean() method in Java. The parseBoolean() parses the string argument as a boolean. The boolean returned represents the value true if the string argument is not null and is equal, ignoring case, to the string "true".Firstly, declare a string.String str = "false";Now, use the Boolean.parseBoolean() method to convert the above declared String to Boolean.boolean bool = Boolean.parseBoolean(str);Let us now see the complete example to learn how to convert String to Boolean.Example: Convert String to Boolean Live Demopublic class Demo { public static void main(String[] args) { // string ... Read More