There are two types of exceptions in Java i.e. checked and unchecked exceptions. Below I have explained about these two exceptions with examples. Checked and Unchecked Exceptions in Java Checked Exceptions Those exceptions that are checked at compilation time are called checked exceptions. Checked exception includes the classes that extend Throwable class except RuntimeException and …
In this tutorial you will learn how to connect java (jdbc) with mysql or oracle database. Java JDBC is an API used to connect with database and perform all database related operations. There are few steps for connecting java with any database. 1. Register Driver Class 2. Create Connection 3. Execute Queries 4. Close Connection …
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In this tutorial I will show you the simplest way to add or import jar in your eclipse project. How to Add or Import Jar in Eclipse Project 1. First of all copy all the jars that you want to import. 2. Now paste them inside lib folder of your project. Web Project: For …
Below are some reasons why Java does not support pointers. Although there are various advantages of pointer but it has several disadvantages that I have mentioned in the article. Simple The pointer concept is very confusing, difficult to understand (especially for beginners) and causes bugs in code. To make java simpler and less …
In this tutorial you will learn about Java Virtual Machine (JVM) architecture. What is JVM? Java Virtual Machine (JVM) is software or a virtual machine that takes .class file as an input and runs java bytecode. Java is machine independent but JVM is machine dependent. What is Bytecode? When java program is compiled using …
There are mainly five different ways to take input from user in java using keyboard. 1. Command Line Arguments 2. BufferedReader and InputStreamReader Class 3. DataInputStream Class 4. Console Class 5. Scanner Class Below I have shared example for each of them. How to Take Input from User in Java Command Line …
In this tutorial you will learn about java properties file and how to perform read and write operations on it. What is properties file? In Java related technologies, properties file is used to store configuration data or settings of application. It has .properties extension. Why we need properties file? It makes application maintenance …
The error javac is not recognized as an internal or external command arises when we try to compile any java source file using javac command. The reason for this error is because the path of javac command is not set properly. This error can be solved easily by setting javac compiler path in environment variables. …
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