Java is a very popular language and used on 7 billion devices worldwide. It is one of the most secured, platform-independent, and object oriented programming languages that’s why it is necessary to be familiar with the basic structure of Java program. A typical Java program consists of the following sections: Package statements Documentation Section Import …
TreeSet is an implementation class of NavigableSet. In a TreeSet, duplicate as well as heterogenous (values of different data types) values are not allowed. If you’re trying to insert heterogeneous objects then it displays a ClassCastException. If the tree set exists, then we can insert a null value, and if the treeset doesn’t exist then …
In this article, we will discuss about nested switch in Java with examples. When a switch statement contains further switch statements inside it, then it is called a nested switch. Inside the nested switch statement, we can give multiple cases and a default case. The inner switch statement must be part of any outer case …
This article will talk about how to get filename without extension in Java language. The file utility method helps you to get rid of the file extension from the file name. Here is an example. Program:
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class substring { public static void main(String[] args) { String fileName = "myfile.java"; if(!fileName.contains(".")) System.out.println("File Name = " + fileName); else { fileName = fileName.substring(0,fileName.lastIndexOf(".")); System.out.println("File Name = " + fileName); } } } |
Output:
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substring |
Explanation: We take a file named ‘myfile’ with the extension ‘.java’. Next, we check whether the …
In this article, we will see what is a global variable and how we can use this in our Java programs. In Java, all the functions and data members are declared inside a class and every declaration has to be done inside it. If we declare them outside the class, then they would not be …
It is pretty impossible to impose hundreds of words or numbers by just writing or putting into variable one by one. Instead, use a loop to avoid extra time. This article gives an overview of nested while loop in Java and how to use them. Why use loops? Loops are the programming structure of an …
Sometimes, people detect some error in the program’s compile-time or run time, which mainly occurs due to race condition while executing programs. Are you excited to know more about race condition? This article will give a piece of detailed information on Race conditions in Java. Before proceeding to know about a race condition, let’s focus …
In this article, we will discuss static import in Java. Just as import statements are used to access a class without its package qualification. In a similar manner, static imports are used to access static members without their class qualification. Some basic static methods used with the class names are as follows: Math.sqrt(4): It is …
