Recent questions tagged JAVA

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java - Unzipping a file from InputStream and returning another InputStream

I am trying to write a function which will accept an InputStream with zipped file data and would return another ... types of streams in Java. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Is this JAX-WS client call thread safe?

Since initialization of the WS client service and port takes ages I like to initialize them once at startup and ... this call be thread-safe? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Adding folder to Eclipse classpath

While developing a Java project, I place all of my jar files in a folder, created within my project, called ... or creating a user library. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to intercept a RequestRejectedException in Spring?

I am seeing a ton of RequestRejectedException entries in my Tomcat log (sample pasted below). These started ... in an error controller? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Java8 Streams - Remove Duplicates With Stream Distinct

I have a stream such as: Arrays.stream(new String[]{"matt", "jason", "michael"}); I would like to remove ... ) .forEach(System.out::println); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Java8 method reference used as Function object to combine functions

Is there a way in Java8 to use a method reference as a Function object to use its methods, something ... have answer about the method reference See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to set JAVA_HOME for multiple Tomcat instances?

I have 2 Java Web Projects. One runs on JDK 1.5 and the other runs on JDK 1.6. I want to run both ... to set JAVA_HOME for each Tomcat server. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - how do I make jfilechooser only accept .txt

I trying to save my contact in my table but filechosser always setit to all file. is there way I can set it to ... printStackTrace(); } } } }); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to query for a List<String> in JdbcTemplate?

I'm using Spring's JdbcTemplate and running a query like this: SELECT COLNAME FROM TABLEA GROUP BY COLNAME There are no ... m.get("COLNAME")); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring Global CORS configuration not working but Controller level config does

I am trying to configure CORS globally via WebMvcConfigurerAdapter shown below. To test I am hitting my API ... controller works just fine. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Duplicate JSON Field with Jackson

I am using Jackson for JSON (de)serialization in conjunction with Spring. However I am having an issue ... (JsonAutoDetect.Visibility.NONE); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Set Content-Type to application/json in jsp file

I am created some jsp file that returns as a response some json string. But I see that the Content-Type is ... /json"); in this example? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Error: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'text/plain;charset=UTF-8' not supported

I'm newbie in Spring Data. I keep getting the error: org.springframework.web.HttpMediaTypeNotSupportedException: Content type ' ... : 150 } ] } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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217 views

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java - Missing required library in eclipse for non-required library

I'm using Eclipse for Java Develepers (Juno x64 running on Windows 7). I have a project in which I was trying out ... be able to do to fix it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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482 views

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java - ISO2 country code from country name

Is there an easy way in Java to get the ISO2 code from a given country name, for example "CH" when given ... it. Any other (easier) solutions? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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152 views

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java - Error(1,1)illegalcharacter 'ufeff' when compiling on android studio

I got an Eclipse project source code(I was told that on Android Studio, maybe they just confused), and I ... .blabla; Please help me, thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - DataBufferLimitException: Exceeded limit on max bytes to buffer webflux error

While sending a file I receive an array of bytes. I always have a problem with webflux to receive an array. ... to resolve that in webflux ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Unable to find required classes (javax.activation.DataHandler and javax.mail.internet.MimeMultipart). Attachment support is disabled

I am facing problems in invoking a method present in a web service. The wsdl was created using AXIS. When I try ... method the way I am doing? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to correctly specify a default value in the Spring @Value annotation?

Initially, I have the following spec: @Value("#{props.isFPL}") private boolean isFPL=false; This works fine ... value from the Properties file: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - swagger @ApiModelProperty example value for List<String> property

I have one class in which there is one property which is List<String> public class MyClass { .... ... Update github ticket for this issue See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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340 views

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java - How can I get the cookies from HttpClient?

I am using HttpClient 4.1.2 HttpGet httpget = new HttpGet(uri); HttpResponse response = httpClient.execute(httpget) ... I get the cookie values? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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338 views

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java - Spring boot ddl auto generator

I'm using spring boot with spring.jpa.hibernate.ddl-auto=create, but when application restarted, all tables ... for already existing tables? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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456 views

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java - Can't Override onPostExecute() method in AsyncTask Class or get it to trigger

I am having trouble getting the onPostExecute() method to call when running an AsyncTask. When I try to set up ... void onPostExecute() { } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Backreferences Syntax in Replacement Strings (Why Dollar Sign?)

In Java, and it seems in a few other languages, backreferences in the pattern are preceded by a backslash (e.g. 1 ... " ones instead of 2 and 3? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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182 views

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java - JIT not optimizing loop that involves Integer.MAX_VALUE

While writing an answer to another question, I noticed a strange border case for JIT optimization. The ... Integer.MAX_VALUE loop limit) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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380 views

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java - Why write Try-With-Resources without Catch or Finally?

Why write Try without a Catch or Finally as in the following example? protected void processRequest(HttpServletRequest request, ... html>"); } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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332 views

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java - How to check if collection contains items in given order using Hamcrest

How to check using Hamcrest if given collection is containing given items in given order? I tried hasItems but it simply ... ("boo", "foo")); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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186 views

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java - Why is my JSONObject related unit test failing?

I'm running my tests using gradle testFlavorType JSONObject jsonObject1 = new JSONObject(); JSONObject jsonObject2 = new ... and does the above. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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