Java Tutorials

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 ...

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-6873729b48f55762281212/] The above program will not cross the compilation stage because there is a ...

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 ...

Java continue complete tutorial with examples. If you have any doubts related to Java continue do leave a comment here. Definition: ‘continue’ is a statement used to skip the remaining statements in the current iteration and move to next iteration of a loop. The looping construct can be a while loop, for loop or a do-while loop. Without a loop, we ...

Differences between Abstarct class and Interface complete tutorial with suitable examples and sample outputs. In case if you need more information about the difference between Abstract class and Interface leave a comment here. An abstract class can have concrete methods, but an interface cannot have. Example 1: [crayon-6873729b495b0580943592/] [crayon-6873729b495b6296394011/] Example 2: An abstract class can consist both abstract methods and ...

Multithreading in Java,  is the mechanism of executing different parts of a program simultaneously. Suppose, in a normal program, we are in one method and calling another method then the control goes to the called method, executes the statements in that method and comes back to calling the method. As long as the control executes the method, the statements after ...

Java convert double to Long – We have different ways to convert a double value to a long value or from long to double. Apart from the given program, you can check out the list of over 500+ Java programs with sample examples and outputs. Methods we used to convert double to long/ long to double: Simple type conversion round() ...

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 ...

Whats is Java BigInteger? The class BigInteger is in the package java.math In Java, we have 4 data types to deal with integer type data. Those are byte, short, int and long. With byte, we can store numbers up to 127. With short, we can store numbers up to 32767. With int, we can store numbers up to 2147483647. With ...

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. ...