Java

Classes are a very important concept in Java. Java code always needs to be written in a class. In this article, we will be taking a very close look at classes and understanding their syntax and semantics. Classes and objects A class defines a new data type. Once defined, this new...

Introduction The break statement is used to stop further execution. It can be used either in a loop or within a switch statement. Break Statement The break statement is used to stop further execution. It can be used either in a loop or within a switch statement. Break in a loop When the break...

The LocalDate class has an overloaded parse() method. In addition to the String Date, it accepts a DateTimeFormatter instance that specifies the format of the input date. So, this can be used in case the String date is not in the yyyy-MM-dd format. The following code demonstrates this: The following code demonstrates...

The LocalDate class has a parse method. You can use this to convert a String to a LocalDate. So, this code simply invokes the parse method with the String date object. It prints the following output: 2015-06-12. The following code demonstrates this: cd2973313a135357d0890b0ba8152680 The LocalDate.parse() method requires the String date to...

Iteration statements are used to repeat a particular block of code until a certain condition is true. In this article, we will be taking a look at Java’s iteration statements. While Statement The while statement repeats a block of code as long as a condition is true. Syntax A while statement has the...

The java.util.Calendar class also encapsulates a date. The Calendar class has some more features than the java.util.Date class. It provides the ability to extract the day, month, year, and other fields corresponding to the date that the Calendar represents. So, sometimes, you may need to convert a String date...

Sometimes, you may need to convert a String to a java.util.Date object. For this, you need to use the SimpleDateFormat class. You need to specify the format in which the String date is present and invoke the parse method. The following code demonstrates how this can be done: 9511d34805f97b537363b6106339b495 This code...

Introduction Control statements are used to change the flow of execution based on changes to certain variables in the code. One of the types of control statements are the selection statements or decision statements. These should be used when you want to check some condition and take a decision based...

Table of Contents One Dimensional Array Declaring Array Allocting Memory to Array Accessing Array Elements Initializing Array Length of Array Multi Dimensional Array Creating 3 Dimensional Array Introduction Arrays are used to store a group of values of the same data type. So a single variable can be used to refer to...

Java 8 has added a new class called StringJoiner. This concatenates Strings using a delimiter as well as adds a prefix and suffix to the concatenated String. Performance-wise, it is similar to StringBuffer.append, but it has the added advantage that it automatically adds a delimiter, prefix and suffix. The following...

There is an overloaded version of the String.join method that accepts as parameter an Iterable implementation. Since all Collection classes implement the Iterable interface, this method can be used to concatenate all the elements in a Collection. The following code demonstrates this: This code creates a List of String values...