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Java Articles
Page 143 of 450
How To Check if a Triangle is Valid or Not When Sides are Given in Java?
A Triangle is a polygon that has 3 sides, and it consists of three sides and three vertices. The sum of the three internal angles is up to 180 degrees. Below is the diagram of a triangle having three sides (a, b, and c): In a valid triangle, if you add any two sides, then it will be greater than the third side. As per our problem statement, we have to check if a triangle is valid or not, if three sides are given, using the Java programming language. Suppose a, b and c are the three sides of ...
Read MoreHow to handle the ArithmeticException (unchecked) in Java?
Java ArithmeticException The ArithmeticException of java.lang package is an unchecked exception in Java. It is raised when an attempt is made to use a wrong mathematical expression in the Java program. An example of ArithmeticExeption is division by 0. If you divide two numbers and the number in the denominator is zero. The Java Virtual Machine will throw ArithmeticException. Example: Throwing ArithmeticException In the following Java program, we try a mathematical operation where we divide a number by 0. public class ArithmeticExceptionTest { public static void main(String[] args) { int a ...
Read MorenWhy we should follow the naming conventions in Java?
The Java team and developer community suggest us to follow naming conventions. They are just conventions and are not mandatory but help in writing Java programs that are more understandable and easier to read. For example, class names should generally be nouns, and interface names should be adjectives. Additionally, capitalize the first letter of each separate word. The names used for classes, variables, and methods are called identifiers. Need to Follow Java Naming Conventions Following are the reasons to follow naming conventions: Multiple developers work on the same project simultaneously. Names that follow naming standards reduce ...
Read MoreHow to handle the NumberFormatException (unchecked) in Java?
The NumberFormatException is a class that represents an unchecked exception thrown by parseXXX() methods when they are unable to format (convert) a string into a number. Here, the parseXXX() is a group of Java built-in methods that are used to convert string representations of numbers into their corresponding primitive data types. Causes for NumberFormatException in Java The NumberFormatException extends IllegalArgumentException class of java.lang package. It can be thrown by many methods/constructors of the classes. Following are some of them: int parseInt(String s): It throws NumberFormatException if ...
Read MoreJava Program to Add Two Complex numbers
Complex numbers are expressed in the form of p + iq, where p and q indicate real numbers and i represents imaginary numbers. For instance, 8.2 + 5.6i is a complex number, where 8.2 is the real part and 5.6i is the imaginary part. As you can see, the real number part contains an integer value (mathematical, not Java integer), and the imaginary part has an additional symbol i. In this article, we will understand how to add two complex numbers in Java. Adding Complex Numbers Since complex numbers are divided into two parts (real and imaginary), the real numbers ...
Read MoreHow to iterate over a list in Java?
In Java if you try to print a List (or any) object directly using the print statement a hash-code of the object will be printed (default behaviour). If you want to print each element of your object (such as List, Array, etc.) or perform any operation on them one by one, you need to iterate through it. Java provides various ways to iterate through objects. Following are different approaches to iterate through a List object: Using For Loop Using While Loop Using Iterator Object Iterate over ...
Read MoreHow to search in a List of Java object?
A List is a sequence of elements of similar data types, and like an array, its elements are stored at specific indices, which can be accessed and searchable through the index (i.e., starting at index 0). We can search through each element in the list and retrieve its index (or position) if it is found in the list. We can search in a List in the following ways - Using indexOf() Method of List Interface Using lastIndexOf() Method Using Comparison Approach Searching in a List using ...
Read MoreHow to iterate a List using for Loop in Java?
To iterate over a List using a for loop, we need to know the size (which can be calculated using the size() method) of the list, so that the loop can execute an accessing element code block till the last position, which is starts from index 0. Once the loop reaches at the last index of the list, it will stop executing and exit. Here are a few examples of how to iterate over a list using a for loop: Iterate a List using For Loop A for-loop is a "control flow statement " which is ...
Read MoreHow to use List size() method in Java With Examples?
In Java, a List is an interface which stores a sequence of elements of similar types. Since the list contains multiple elements, we might need to know how many element the list currently have. To count the total number of elements present in a list, the List interface provides a method named size(). The List size() Method The size() method of List interface is used to retrieve size of the current List. The size refers to total number of items currently the list holds. For example, a list have {1, 2, 3}, then the size of the list will be ...
Read MoreHow To Calculate Volume of Prism in Java?
A Prism refers to a three-dimensional solid object which has two identical ends. A prism has two faces, which are: Top and Bottom face. Lateral face Both top and bottom faces are called bases which are identical to each other. All lateral faces are also identical to each other which belong to the class of parallelograms. When the base of the prism is triangular in shape that prism is called a Triangular prism. Similarly, when the base of a prism is rectangular in shape it is called a Rectangular prism. ...
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