java-api

问题 I am new to ELastic Search. Data in Elastic search is in Parent-Child Model.I want to perform search in this data using java api. parent type contains author details and child type contains book details like book name,book publisher, book category. While performing a search on child details,I need to get the parent details also and vice versa. Sometimes search conditions will be on parent type as well as child. eg search for books written by author1 and type Fiction . How can i implement this

问题 I am trying to write content into a PDF file. I have written the code public ByteArrayOutputStream createPDF(String text) throws IOException, COSVisitorException { PDDocument document; PDPage page; PDFont font1; PDPageContentStream contentStream; ByteArrayOutputStream output = new ByteArrayOutputStream(); document = new PDDocument(); try { page = new PDPage(); document.addPage(page); contentStream = new PDPageContentStream(document, page); contentStream.beginText(); contentStream

问题 How to convert the below ES query to Java API? I am using elastic search 2.3.3 GET /schema_name/_search { "from": 0, "size": 200, "query": { "function_score": { "query": { "match_all": {} }, "boost": "5", "functions": [{ "filter": { "term": { "alert_code": "event_rule_1" } }, "weight": 50 }, { "filter": { "term": { "alert_code": "event_rule_2" } }, "weight": 30 }, { "filter": { "term": { "alert_code": "event_rule_3" } }, "weight": 10 }, { "filter": { "term": { "alert_code": "event_rule_4" } }

问题 I am testing the Kafka High Level Consumer using the ConsumerGroupExample code from the Kafka site. I would like to retrieve all the existing messages on the topic called "test" that I have in the Kafka server config. Looking at other blogs, auto.offset.reset should be set to "smallest" to be able to get all messages: private static ConsumerConfig createConsumerConfig(String a_zookeeper, String a_groupId) { Properties props = new Properties(); props.put("zookeeper.connect", a_zookeeper);

问题 Why does the Java API use int , when short or even byte would be sufficient? Example: The DAY_OF_WEEK field in class Calendar uses int . If the difference is too minimal, then why do those datatypes ( short , int ) exist at all? 回答1: Some of the reasons have already been pointed out. For example, the fact that "...(Almost) All operations on byte, short will promote these primitives to int". However, the obvious next question would be: WHY are these types promoted to int ? So to go one level

问题 I am seeking to clarify what the Java API documentation states about the FileWriter class. The documentation states the following: constructor: Constructs a FileWriter object given a file name. public FileWriter(String fileName) throws IOException fileName - String The system-dependent filename. IOException - if the named file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened or any other reason It is not clear to me whether or not

问题 I have just begun developing using J2ME using Eclipse Pulsar and I am trying to work out how you go about giving eclipse the associated javadoc for all of the CDLCs. I am using the Symbian S60 5th edition SDK if that makes any difference. Thanks in advance. 回答1: On the Windows>Preferences>Java ME>Device Management dialog choose the device that you are using and push the edit button. This should open a new dialog. You can edit the javadoc locations on the libraries tab. 来源： https:/

问题 An exampes that demonstrates how we update multiple fields on elastic search document Map<String, Object> updateObject = new HashMap<String, Object>(); updateObject.put("field1", "updated value for fields1"); updateObject.put("field2", "updated value for fields2"); updateObject.put("field3", "updated value for fields3"); Boolean meessage = client.prepareUpdate("indexName","indextype","documentId").setDoc(updateObject).setRefresh(true).execute().actionGet(); indexName will be your index name

问题 The below code is used to connect to the speechmatics api for conversion of speech to text in java. But unable to connect and gives back an error. https://app.speechmatics.com/api-details Here is the link which contains the total information and im using this : curl -F data_file=@my_audio_file.mp3 -F model=en-US "https://api.speechmatics.com/v1.0/user/$MY_API_USER_ID/jobs/?auth_token=$MY_API_AUTH_TOKEN" # transcription try { URL url = new URL("https://api.speechmatics.com/v1.0/user/17879/jobs

问题 I'm new in android. I'm learning about javamail to create app that can send email notification. I follow this tutorial https://www.simplifiedcoding.net/android-email-app-using-javamail-api-in-android-studio/ It's working well in emulator android. I can receive email. Then I tried to install my app in my android device with Wifi connection, it's working well. But when I use Data Mobile Connection (not Wifi) email not sent. Can you tell me why? Thanks for advance. 回答1: solution from @Agung from