Finding the MIME type of a file is useful when you want to perform certain actions. PS: I have placed a file named nature.jpg in the folder /home/sridhar before executing
The first approach consists of annotating the class as below: @ToString@EqualsAndHashCode@Getter@Setter@RequiredArgsConstructorpublic class Foo { …} A shortcut for @ToString, @EqualsAndHashCode, @Getter on all fields, @Setter on all non-final fields, and
Java uses the symbol tilde (~) to represent the operator. The following examples are clearly illustrative of the use and outcome of this operator. Code sample: public class JavaUnary{public static
See how to validate the length of a field in Java via javax.validation.constraints.Size. We can do it as follows: @NotNull@Size(min=3, message=”Name must be at least 3 characters long”)private String name;
FileTime is a class in Java that helps you retrieve time-related information regarding files. One such method that we will see below is to get the modified time of a
Literals of type long are expressed by adding an L suffix. For example: 0L // The decimal number zero (type ‘long’)1L // The decimal number one (type ‘long’)2147483648L // The value
Setting the Hibernate batching size can be accomplished via hibernate.jdbc.batch_size. In Spring, we need to add in application properties per the following setting (the recommended batch size is between 5
In order to check whether or not an index is in range [0, n) we can rely on a “if” statement, as below: if (index = n) { … }
Starting with JDK 9, we can create an immutable list via the suite of List#of(…) methods. For example, an immutable list of 3 elements can be created as follows: import java.util.List;…List
