Programming Articles - Page 3294 of 3366

To extract last n characters, simply print (length-n)th character to nth character using the charAt() method.ExampleLive Demopublic class ExtractingCharactersFromStrings {    public static void main(String args[]) {           String str = "Hi welcome to tutorialspoint";       int n = 5;       int initial = str.length()-5;       for(int i=initial; i

To find the consonants in the given String compare every character in it using the charAt() method with the vowel letters and remaining are consonants.ExampleLive Demopublic class FindingConsonants {    public static void main(String args[]) {       String str = new String("Hi Welcome to Tutorialspoint");       for(int i=0; i

One way to find the vowels in a given String is to compare every character in it using the charAt() method with the vowel letters. Example Live Demo public class FindingConsonants { public static void main(String args[]) { String str = new String("Hi Welcome to Tutorialspoint"); for(int i=0; i

You can read a character in a String using the charAt() method. To find the vowels in a given String you need to compare every character in it with the vowel letters. Example Live Demo public class FindingVowels {    public static void main(String args[]) {       String str = new String("Hi Welcome to Tutorialspoint");       for(int i=0; i

File manipulation is a fundamental aspect of programming, especially when dealing with data processing and management. Python offers powerful tools for handling files and text efficiently. A common task is searching for specific text patterns within a file and replacing them with desired content. This article explores several practical methods for searching and replacing text in a file using Python. Basic Text Replacement Let's start with a simple example of searching for a specific word in a file and replacing it with another word. In this particular example, we'll search for the word "old" and replace it with "new" − ... Read More

You can concatenate two Strings using the concat() method.ExampleLive Demopublic class ConcatinatedStrings {    public static void main(String args[]) {             String str1 = new String("Tutorials");       String str2 = new String( "Point");       String res = str1.concat(str2);       System.out.println(res);    } }OutputTutorialsPoint

String class is immutable once you create an object of string you can modify its data.The StringBuffer class is immutable, once you create a StringBuffer object you can change/modify the contents of it.This class provides various methods to manipulate its data such as append(), delete(), insert() etc.

The toString() method returns the current object in String format.ExampleLive Demopublic class Test { public static void main(String args[]) { Test obj = new Test(); System.out.println(obj.toString()); System.out.println("Hello"); } }OutputTest@2a139a55 Hello

When the String literal used to create String, JVM initially checks weather String with the same value in the String constant pool, if available it creates another reference to it else it creates a new object and stores it in the String constant pool.In case of an object, each time you instantiate the class a new object is created given value irrespective of the contents of the String constant pool.

The StringBuffer and StringBuilder classes are used when there is a necessity to make a lot of modifications to Strings of characters.Unlike Strings, objects of type StringBuffer and String builder can be modified over and over again without leaving behind a lot of new unused objects.The StringBuilder class was introduced as of Java 5 and the main difference between the StringBuffer and StringBuilder is that StringBuilder’s methods are not thread safe (not synchronized).It is recommended to use StringBuilder whenever possible because it is faster than StringBuffer. However, if the thread safety is necessary, the best option is StringBuffer objects.Read More