![]() This works particularly well for large team projects where states change often. Using OOP, programmers can create classes in order to iteratively reuse code, with the same set of “instructions” being sent to different objects, rather than coding each operation from scratch each time. Object-oriented programming focuses on objects made up of both data (fields) and code (properties or attributes). In this guide, we’ll look into both the theory and practice of object-oriented programming to help you write performant and error-free Java code. While these concepts are crucial for creating well-structured Java programs in the development phase, implementing crash reporting can also help you catch the errors your end-users encounter in the operation and maintenance phase of the software development life cycle. Java comes with specific code structures for each OOP concept, such as the extends keyword for the inheritance principle or the getter and setter methods for the encapsulation principle. There are seven core principles of object-oriented programming, as follows. OOP concepts are intended to improve code readability and reusability by defining how to structure your Java program efficiently. Java is a class-based object-oriented programming (OOP) language built around the concept of objects. Let's see an example of Java Exception Handling in which we are using a try-catch statement to handle the exception.Using OOP concepts to write high-performance Java code (2023) By Anna Monus | Posted | 14 min. It specifies that there may occur an exception in the method. The "throws" keyword is used to declare exceptions. The "throw" keyword is used to throw an exception. It is executed whether an exception is handled or not. The "finally" block is used to execute the necessary code of the program. ![]() It can be followed by finally block later. ![]() It must be preceded by try block which means we can't use catch block alone. The "catch" block is used to handle the exception. The try block must be followed by either catch or finally. The "try" keyword is used to specify a block where we should place an exception code. Java provides five keywords that are used to handle the exception. Some example of errors are OutOfMemoryError, VirtualMachineError, AssertionError etc. Unchecked exceptions are not checked at compile-time, but they are checked at runtime. For example, ArithmeticException, NullPointerException, ArrayIndexOutOfBoundsException, etc. The classes that inherit the RuntimeException are known as unchecked exceptions. Checked exceptions are checked at compile-time. ![]() For example, IOException, SQLException, etc. The classes that directly inherit the Throwable class except RuntimeException and Error are known as checked exceptions. However, according to Oracle, there are three types of exceptions namely:ĭifference between Checked and Unchecked Exceptions 1) Checked Exception An error is considered as the unchecked exception. There are mainly two types of exceptions: checked and unchecked. The hierarchy of Java Exception classes is given below: Types of Java Exceptions The class is the root class of Java Exception hierarchy inherited by two subclasses: Exception and Error. What are the 4 rules for using exception handling with method overriding?.What is the difference between the throw and throws keyword?.Is there any possibility when the finally block is not executed?.What happens behind the code int data=50/0 ?.What is the difference between checked and unchecked exceptions?.
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