language-fundamentals

finally Block in Java

The finally block in Java is a block of code that is always executed, regardless of whether an exception is thrown or not. This makes it a useful place to put code that needs to be executed, even if an … Read More

Throwing and re-throwing an Exception in Java

When an exception is thrown, it is propagated up the call stack until it is caught by a try-catch block. If the exception is not caught, the program will terminate. Re-throwing an exception means throwing the same exception again after … Read More

User Defined Exception in Java

In Java, exceptions are used to handle errors that occur during the execution of a program. There are many built-in exceptions in Java, but sometimes we need to create our own exceptions to handle specific errors. These exceptions are called … Read More

Exception Handling Keywords in Java

Exception handling is an important part of any Java program. It allows us to gracefully handle errors and unexpected situations. Java provides 5 exception handling keywords in Java. These are: try The try keyword is used to enclose a block … Read More

extends Keyword in Java

The extends keyword in Java is used to establish a class inheritance relationship. Extends Java allows a class (known as the subclass or derived class) to inherit the properties and behaviors (fields and methods) of another class (known as the … Read More

Why Multiple Inheritance is not Supported in Java?

Multiple inheritance is not supported in Java because it can lead to ambiguity. This is the problem of having two or more base classes with the same method or field. In this case, the compiler would not know which method … Read More

How to Call Method in Java?

In Java, we can call a method or function by using the name of the method followed by parentheses, optionally containing any required arguments. Following are the steps to call a method in Java: Step-by-step example: Suppose we have a … Read More

How to Create Method in Java?

In Java, a method is a block of code that performs a specific task or operation. It is used to define the behavior of an object or a class. Methods are reusable, which means you can call them multiple times … Read More

ArrayIndexOutOfBoundsException in Java

An ArrayIndexOutOfBoundsException is a common runtime exception in Java that occurs when we try to access an element of an array using an invalid index. The valid index range for an array in Java is from 0 to array.length – … Read More

Default Variable Initialization in Java

Default Variable Initialization in Java is to initialize to a default value when they are declared. The default value of a variable depends on its data type. The following table shows the default values of variables in Java: Data Type … Read More