how to validate if there's already a field with the same registered number (Logical problem) Problem Description: (https://i.stack.imgur.com/52C98.png) I can’t let the user enter a code that already exists in the database,so i need to make one more validation for this field "code". obviously I have to use a ‘if statement’ but i just can’t … Read more
How do you configure the spring integration poller after XSD changes have invalidated the fixed-delay and fixed-rate attributes? Problem Description: Original xml: <int:poller default="true" task-executor="stepTaskExecutor" fixed-delay="1000"> The fixed-delay attribute is no longer legal, and fails XML parsing in the (eclipse) IDE. Alternative configuration: An alternative suggested elsewhere (including https://docs.spring.io/spring-integration/docs/2.0.0.M3/spring-integration-reference/html/samples.html): <!– Globally scoped Spring Integration bean … Read more
How can I use my ApiService and Room Dao into WorkManager with Hilt, implementing MVVM pattern? Problem Description: I want to use my ApiService and my Room Dao in the WorkManager class implementing the MVVM pattern and Hilt as dependency injection. This is my code: ViewModel @HiltViewModel public class SyncViewModel extends ViewModel { private final … Read more
Add something to the java classpath Problem Description: I have a jar-File, which I want to add to the classpath, so I ran java -cp ".;C:Pathtomymagicaljarfile.jar;.someotherdirectory" MyClass The Problem is: I use some import-commands in my class, an Java doesn’t find them anymore, because I replaced the classpath. I want just add two elements to … Read more
Asynctask does not return string, but does not contain a reported error Problem Description: I’m passing a URL to an ASYNC class (wsbRedirTest) and I expect to receive the content of the page. However, it does not return any results. public class wsbRedirTest extends AsyncTask<String, Void, String> { private Object[] values; protected void onPreExecute() { … Read more
Simple Point of Sale Order Info: How to compile all the Items that a user will input? Problem Description: I was doing a simple point of sale system, and I’m having a difficulty on outputting all the items that the user will input. So basically it’s like a receipt. Here’s the whole code: public class … Read more
How to left align JPanel in JTabbedPane? Problem Description: I want to Left align the tab labeled "Unwanted Centered Panel" here is my SSCE: import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTabbedPane; public class Issue { public Issue() { } public JPanel buildIssuePanel() { GridBagLayout layout1 = new GridBagLayout(); GridBagConstraints gbc1 … Read more
Spring Boot Test "Failed to load ApplicationContext" Problem Description: I am getting an error while testing my rest application but can’t understand why.My error output: ava.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:98) at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:124) at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:118) at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) at org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener.prepareTestInstance(SpringBootDependencyInjectionTestExecutionListener.java:43) at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:248) at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:138) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at … Read more
convert or cast output of JpaRepository Problem Description: I have three interfaces that extend JpaRepository and a custom interface that has two functions. These two functions have their special output in each of three interfaces. I implement it with List in the custom interface, so I have to use same output in the three interfaces, … Read more
How to find a missing number if a range of millions of numbers in an array? Problem Description: I want to get the first missing number in a range of millions of numbers. For example, I have an array with n number of elements. And it starts from 0. And in between for example, after … Read more