If you’re thinking about a startup, it’s likely you need to raise an initial round of funding for your venture. This article covers some of the very early development techniques and strategies to help your startup be well-positioned to receive this investment capital. 1) Understanding What Investors Want Professional early-stage
No longer constrained to enterprise systems, database-driven applications or web service layers, with XNA, .NET developers can now spread their digital wings and let their pixelized imagination run wild. Their favorite development platform and language now enable them to explore new worlds and new challenges of their own making, all
In MySQL, there is a provision to search based on natural mode. Let us consider the following example to understand this in detail. Creation of the table: CREATE TABLE ‘PROP_TBL’ ( ‘PROPERTY’ VARCHAR(100), ‘DOMAIN’ VARCHAR(20), ‘VALUE’ VARCHAR(2000), ‘PATH’ VARCHAR(100), PRIMARY KEY (‘PROPERTY’, ‘DOMAIN’, ‘PATH’), FULLTEXT (PROPERTY,DOMAIN))ENGINE=InnoDB; And use the following
First, define a probe (an instance of the entity class): User user = new User();user.setName(“Ana”);user.setEmail(“[email protected]”); Next create a probe: Example userExample = Example.of(user); Next, define a repository that extends QueryByExampleExecutor interface: @Repository public interface UserRepository extends JpaRepository, QueryByExampleExecutor { } Finally, call one of the QueryByExampleExecutor methods (e.g., exists()): public
To log transactions details in a Spring Boot application simply add the following settings in application.properties: logging.level.ROOT=INFO logging.level.org.springframework.orm.jpa=DEBUG logging.level.org.springframework.transaction=DEBUG logging.level.org.hibernate.engine.transaction.internal.TransactionImpl=DEBUG
To log HikariCP details simply add in application.properties the following settings: logging.level.com.zaxxer.hikari.HikariConfig=DEBUG logging.level.com.zaxxer.hikari=DEBUG If you need a deeper level of details then replace DEBUG with TRACE.
The java.lang.Math package is very powerful. Understand more methods in this package that are related to the Euler’s number named e. public class MathMethods{ public static void main(String args[]) { MathMethods mathMethods = new MathMethods(); mathMethods.proceed(); } private void proceed() { //The methid Math.exp returns e^x, where x is the argument
JAR file in Java is a compressed format and is used for packaging of the deliverables. At times, you may want to manipulate this file.Below example indicates a scenario for the same. import java.util.jar.*;import java.io.*; public class RetrievingJarEntry{ public static void main(String args[]) { RetrievingJarEntry retrievingJarEntry = new RetrievingJarEntry(); retrievingJarEntry.proceed(); } private void proceed() { String sourceJarFile = “files/contacts.jar”; String sourceFile = “2.txt”; String destFile = “files/new2.txt”; try{ JarFile jarFile = new JarFile(sourceJarFile); JarEntry jarEntry = jarFile.getJarEntry(sourceFile); System.out.println(“Found entry: ” + jarEntry); if ( jarEntry != null) { //Getting the jarEntry into the inputStream InputStream inputStream = jarFile.getInputStream(jarEntry); //Creating a output stream to a new file of our choice FileOutputStream fileOutputStream = new java.io.FileOutputStream(destFile); System.out.println(“Attempting to create file: ” + destFile); while (inputStream.available() 0) { fileOutputStream.write(inputStream.read()); } System.out.println(“Created file: ” + destFile); fileOutputStream.close(); inputStream.close(); } }catch(IOException ioe) { System.out.println(“Exception: ” + ioe); } }} /* Expected output: [[email protected]]# java RetrievingJarEntryFound entry: 2.txtAttempting to create file: files/new2.txtCreated file: files/new2.txt */ //Please note: You have to create a folder with name files and a jar file contacts.jar which has files 1.txt, 2.txt and 3.txt
Enums are predefined place holders in Java. Knowing the contents of an enum will be handy in many instancesLet us look at how to navigate the elements of an enum public class NavigatingAnEnum{ public static void main(String args[]) { NavigatingAnEnum navigatingAnEnum = new NavigatingAnEnum(); navigatingAnEnum.proceed(); } enum Criteria { LOW, MEDIUM, HIGH } private void proceed() { System.out.println(“Elements of the enum Criteria…”); for (Criteria criteria : Criteria.values()) { System.out.println(criteria); } }} /* Expected output: [[email protected]]# java NavigatingAnEnumElements of the enum Criteria…LOWMEDIUMHIGH */