October 21, 2024
Chicago 12, Melborne City, USA
java

Foreign Key not Getting automatically generated in child table

I have two entities where the primary key of first entity is the foreign key of the second. When I save the parent, my foreign key is not set, so I want to know why it is not being set automatically. Parent Entity ExcpType.java @Getter @Setter @Entity @Table(name = "mst_excp_type") public class ExcpType implements Serializable

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java

Error getting access token for service account: 401 Unauthorized while calling refresh on Google Credentials

I am using a service account to access the google cloud features like Drive and Contact to save data through my app. I have suddenly started getting this for all users of some clients. Rest of them seem to be working fine. Error getting access token for service account: 401 Unauthorized POST https://accounts.google.com/o/oauth2/token, iss: XXXX.iam.gserviceaccount.com

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java

How to remove all notifications using Accessibility?

The task is to remove all notifications that the application creates using Accessibility. The app runs in the background and generates a notification Notification notification = null; if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) { notification = new Notification.Builder(this, CHANNEL_ID) .setContentTitle("Service is running") .setContentText("App is performing background tasks") .setSmallIcon(R.drawable.ic_service_icon) .build(); } startForeground(1, notification); ` I’m trying to delete

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java

Unreachable Catch Block for IsEmptyException and IsFullException. These exceptions are never thrown from the try statement body

In my ArrayQueueTest.java file, I can’t seem to figure out what’s going wrong. I get the same error, which is unreachable catch block for IsEmptyException and IsFullException I will give money to whoever helps me with this. I have tried everything from double checking imports/packages to make sure everything has the correct path. The files

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java

How to flush a RandomAccessFile?

I use "rw" mode and want to flush content into device: RandomAccessFile random= new RandomAccessFile(path.toFile(), "rw"); random.write(1); But they always failed on flush operation: //Force failed random.getChannel().force(true); or //sync failed random.getFD().sync(); There is no detail reason: sync failed java.io.SyncFailedException: sync failed at java.io.FileDescriptor.sync(Native Method) Other modes also produce the same error:"rwd","rws". Why and how to

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java

Why are the docs not being found in Spring AI Vector Store when they exist in mongo?

I am working on a simple RAG using Spring AI and my MQTT server project available here. I swear I had it working once but I didn’t commit and now it isn’t working again. Basically I think this issue is with the vectorstore. I say that because here public void updateSmartHomeVectors() throws JsonProcessingException { String

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java

Kafka Streams and CompletableFuture (or asynch java api)

I am studing Apache Kafka Stream SPI. I am wondering is there are a way to execute asynch code inside of mapValues method. For example to retrieve data from external store. Is there is a way to interract with Kaska Streams in event-loop reactive style? StreamsBuilder streamsBuilder = new StreamsBuilder(); streamsBuilder .stream("SOURCE_TOPIC", Consumed.with(Serdes.String(), Serdes.String())) .mapValues((readOnlyKey,

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java

Level.setBlock() places invisible blocks

I’m trying to create an item that places blocks that are in another hand above the block on which the item is used, but it only places the first block normally, and the others are invisible, which become normal if you right-click on them or rejoin the world How can this be fixed? package "my

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java

Huffman Coding Java

So I have this question: Consider a DMS with seven possible symbols Xi, i = 1, 2, … , 7 and the corresponding probabilities p1 = 0.37, p2 = 0.33, p3 = 0.16, p4 = 0.07, p5 = 0.04, p6 = 0.02, and p7 = 0.01? We first arrange the probabilities in the decreasing order

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java

How to find latitude and longitude using Java

I want to find the current geolocation, latitude and longitude, of the computer at any one time using Java. My understanding is that there are no native Java libraries that handle this. What library might I use, then, that would be simplest, given that my requirements are no more complex than that? Thank you. You

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