Java

Collections vs Concurrent Collections in Java | Following are the limitations of traditional collection (java.util package):- Hence these traditional collection objects are not suitable for scalable for multithreaded applications. To overcome these problems concurrent collection was introduced in the 1.5 version. Sample program to demonstrate ConcurrentModificationException while working with the collection. While one thread is […]

Regular Expression in Java | If we want to represent a group of strings according to a particular pattern then we can use regular expression. Java has provided Pattern and Matcher classes to work with regular expression. Pattern and Matcher classes are present in the java.util.regex package and they were introduced in the Java 1.4

Generics in Java | The main objectives of generics are:- Type Safety Arrays are type safe i.e. we can give the guarantee for the type of element present inside the array. For example:- If our programming requirement is to hold only string type of objects then we can choose a string array. By mistake, if

Top 10 Common Exceptions in Java | Based on who raises the exception all exceptions are divided into 2 categories:- JVM Exceptions:- The exceptions raised by JVM itself whenever a particular event occurs are called JVM exceptions. Examples:- ArithmeticException, NullPointerException, etc. Programmatic Exception: A programmer raises explicitly to indicate that something goes wrong is called

Try with Resources & Multi Catch block in Java | Java 1.7 version enhancement for exception handling | As part of the 1.7 version in exception handling the following two concepts were introduced:- Try with Resources in Java Until the 1.6 version, whatever resources we open as part of try block compulsory we should close

throw and throws In Java | In the introduction of Exception Handling, we have seen various concepts including exception hierarchy, Checked vs Unchecked Exception, and Fully Checked vs Partially Checked Exception. Later we discussed how to handle the exception using the try-catch-finally block with different test cases. throw keyword in Java Exception in thread “main”

try-catch-finally in Java | In this post, we will discuss, how we can handle the exception using try-catch block and the role of the finally block. Also see:- Exception Handling in Java Without try-catch Statement1Exception in thread “main” java.lang.ArithmeticException: / by zeroat Test.main(Test.java:4) It is an abnormal termination. Output:- Statement19Statement3 It is normal termination. It

Exception Handling in Java | In this post, we will discuss an exception, why it occurs, and how we can handle it. What is an exception? An unexpected unwanted event that disrupts the flow of the program is called an Exception. Example:- FileNotFoundException, ArrayIndexOutOfBoundException, and e.t.c. It is highly recommended to handle the exception. Purpose

Collections Class In Java | The Collections class defines several utility methods for collection objects like sorting, searching, reversing, etc. Sorting Elements in the List Collection class defines the following 2 sort() methods:- Program to sort elements list according to the default natural sorting order. Program to sort elements of a list according to Customized