You are tired of declaring the Getter, Setter, toString(), equals() and hashCode() method for each class that we want to use these methods. Using @Data annotation in Project Lombok can help us avoid this problem. Let’s create a Maven project for example: With Project Lombok dependency… Read More
To avoid multiple threads using a method at the same time, we can declare the method using synchronized keyword of Java like below:
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package com.huongdanjava.lombok; public class Example { public synchronized int calculate(int a, int b) { return a + b; } } |
Project Lombok also provides a safer way to do this by using @Synchronized annotation.
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package com.huongdanjava.lombok; import lombok.Synchronized; public class Example { @Synchronized public int calculate(int a, int b) { return a + b; } } |
With this annotation, Lombok will generate… Read More
When we use a resource like InputStream, OutputStream in Java, we should remember to close that resource after using. Before Java 7, we can close a resource in a finally block as below:
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package com.huongdanjava.lombok; import java.io.*; public class Example { public static void main(String[] args) throws IOException { InputStream is = null; try { is = new FileInputStream(new File("/Users/Khanh/text.txt")); } finally { if (is != null) { is.close(); } } } } |
Since Java 7, we can use the try with resource to… Read More
Normally, when we use a Logging framework like Log4J, Logback or Simple Logging Facade for Java (SLF4J) for these Logging frameworks in a class, we need declare for example as below:
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package com.huongdanjava.lombok; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class Example { public static final Logger LOGGER = LoggerFactory.getLogger(Example.class); public void print(String message) { LOGGER.info(message); } } |
But with Project Lombok, we don’t need to do that. When using Project… Read More
Normally, when we need to create an object with a lot of its information, we can use the Builder Pattern for that purpose. For example, I have a Student class as below:
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package com.huongdanjava.lombok; public class Student { private String firstName; private String middleName; private String lastName; private String country; public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getMiddleName() { return middleName; } public void setMiddleName(String middleName) { this.middleName = middleName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public String getCountry() { return country; } public void setCountry(String country) { this.country = country; } @Override public String toString() { return "Student{" + "firstName='" + firstName + '\'' + ", middleName='" + middleName + '\'' + ", lastName='" + lastName + '\'' + ", country='" + country + '\'' + '}'; } } |
To build this object with all information using the Builder Pattern, we… Read More
In many situations working with Java object, we need define toString(), equals() or hashCode() method. These methods can be added to the Java object automatically by using Project Lombok. In this tutorial, I will show you all about this! First of all, we need a… Read More
In this tutorial, I will show you how we can use Project Lombok to generate Getter, Setter methods or the constructors in a Java object automatically. OK, first of all, we need to create an example Maven project. with Project Lombok dependency as below:
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<dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.24</version> <scope>provided</scope> </dependency> |
In this tutorial, I will show you how we can install Project Lombok plugin into IntelliJ IDEA on macOS. – First of all, we need open our IntelliJ IDEA. – Go to IntelliJ IDEA -> Preferences… and then Plugins – Press Browse repositories… to search… Read More
