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Author Archives: Writer - MK

Java Convert Double To Long – Examples

Java convert double to Long – We have different ways to convert a double value to a long value. Simple type conversion round() longValue() parseLong() and String methods, etc Simple type conversion In this, we just will convert the double type data to long type with explicit type casting. In this conversion, the value after the decimal point is truncated ...

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Oops Concepts In Java – Tutorial With Examples | Oops

Oops Concepts in Java complete tutorial & Types with sample examples & Programs. Also check the complete Java tutorials right here. There are different paradigms followed in writing programs (developing software) like the following… Sequential Programming. Procedure Oriented Programming. Object-Oriented Programming. Multi-tier Programming, etc To develop better software, programmers and managers concentrate on the aspects like the following. These people ...

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Parameterized Constructor In Java – Tutorial & Examples

What is Parameterized Constructor in Java – Tutorial & Examples – If we want to set some data to the constructor so that it can be used in the constructor then we can send so like Person r=new Person(10,20); to receive the values, the corresponding constructor should have formal arguments like. [crayon-5c16630f39bc4501277631/] If we want to send three values to constructor ...

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Generics Class With Multiple Type Parameters In Java

How the generics work with multiple types: “Generics” mechanism allows us to work with a class (or method) that suits for any type of data. Suppose we want one Stack that holds Integer data and another Stack that holds String data then we need two different classes. With generics, we can write only one class that works for both the ...

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Java Simple Generics Class – Tutorial & Programs

Generics is the mechanism of creating a class or method that works for any type of data. Here we covered the complete tutorial along with suitable examples and sample programs, Examples. Note: Generics work with objects (Integer, Double, String, etc) only. They cannot be used with primitive type data (int, double, etc). [crayon-5c16630f3a378113261789/] Output: [crayon-5c16630f3a390598973873/] In the above example, class ...

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Java Exception Throw Clause – Tutorial & Examples

Java exception Throw Clause – “throw” clause is used to throw an exception from our side. Normally, the system throws an exception when a runtime error occurs. Generally “throw” is used in two situations When we want to throw a new exception object (that is created by us) When we want to pass an exception object from one place to ...

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Constructors In Java – Types & Examples | JavaTutorials

A constructor is a special method that is invoked when a new object is created. If we want to perform any one-time activities on an object at the time of its creation, then the constructor is the right place. Generally, the initialization of instance variables are done in the constructor. The purpose of a constructor is not limited to initialization. ...

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Java Constructor Chaining – Types & Example | Tutorials

Java Constructor Chaining – Calling one constructor from another constructor is generally referred to as constructor chaining. This can be achieved in two ways. this() super() in some cases we use only this(), in some other cases, we use only super(). Sometimes we use both (but not directly). Normal Java constructor calling (without chaining) When we create an object, its ...

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Exception Handling In Java – Tutorial & Examples

What is Exception Handling In Java – When we work with a program we come up with different kinds of errors like syntactical errors, logical errors, runtime errors, etc. let us try to differentiate these errors with a simple program. Example Program To Differentiate the Errors: [crayon-5c16630f3b4e9872520385/] The above program will not cross the compilation stage because there is a ...

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Multilevel Inheritance In Java – Tutorial & Examples

What is Multilevel Inheritance In Java? In Java (and in other object-oriented languages) a class can get features from another class. This mechanism is known as inheritance. When multiple classes are involved and their parent-child relation is formed in a chained way then such formation is known as multi-level inheritance. In multilevel inheritance, a parent a class has a maximum ...

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