Introduction Hibernate is a framework which allows you to access database tables from Java code. Before Hibernate came into existence, JDBC was widely used. JDBC is an API to access a relational database from a java program. JDBC basically allows you to execute SQL statements from Java code, so any SQL statement which you can run on a database directly,...

Introduction A List is an interface in the Java collection framework. It can be used to store objects. Programmers often encounter scenarios where they need to sort a List. There are several ways you can achieve this. In the next few sections, I will be going over each method in detail. 1. Using Collections.sort The Collection framework has the java.util.Collections class. This...

Introduction There are often scenarios in programming, where you will need to convert a date in String format to an actual Date object. For example, such a scenario may occur when the date is read from an end user via a UI and sent to the back-end code. In this article, we will understand the different ways in which you...

Introduction In Java, a String is a sequence of characters. There are often programming situations where you will need to concatenate Strings. There are several ways in which you can achieve this. In the next few sections, I will be going over each method in detail. Using + Operator The + operator is also known as the concatenation operator. It can be...

The DecimalFormat class offers the following four such methods which can be used to easily set the maximum and/or minimum digits for decimal numbers. As shown in the below table, two of these methods can set max/min digits for integer part while the other two methods can do the same for the fraction part of the decimal numbers as...

The DecimalFormat class has a method called setRoundingMode() which can be used for setting the rounding mode for DecimalFormat object. The setRoundingMode() accepts RoundingMode class object as the parameter. You can pass any of the Enum constants available in the RoundingMode class as parameter to the setRoundingMode() method to achieve the desired rounding of decimal number. The following example demonstrates...

The DecimalFormat class has a method called setGroupingSize() which sets how many digits of the integer part to group. Groups are separated by the grouping separator. Hence you can use setGroupingSize() method to change the default group digits number as you need. The following example demonstrates setting grouping separator for integer part of the decimal number: 219bd6a59d7bd881631c58a62a5ed178 The above code produces the...