java-8

问题 I have a list of List<ManagedInstance> I'm looking for this equivalant in java-8 - how to find an external ip of a ManagedInstance ? I saw in the java-doc, but found no "external IP" property. @SuppressWarnings("javadoc") public final class ManagedInstance extends /** * [Output only] The unique identifier for this resource. This field is empty when instance does * not exist. * The value may be {@code null}. */ @com.google.api.client.util.Key @com.google.api.client.json.JsonString private java

问题 I would like to know if a one-liner exists for creating a CompletableFuture from a synchron method call. If no, why? Long version: final CompletableFuture<ReturnType> future = new CompletableFuture<>(); final String parameters = "hello"; ReturnType result; try { result = syncMethodCall(parameters); } catch (Exception e) { future.completeExceptionally(e); } future.complete(result); return future; Short desired version (or kind): final String parameters = "hello"; return CompletableFuture

问题 I am new to struts and trying to setup a basic struts application with weblogic server in eclipse. while running the project with the basic jsp, web xml,struts xml and action i am getting the below error ####<Feb 20, 2017 12:45:31 AM IST> <Error> <HTTP> <Gaurav-PC> <AdminServer> <[STANDBY] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1487531731340> <BEA-101371> <There was a failure when processing annotations for application D:\Eclipse Workspace

问题 I am new to struts and trying to setup a basic struts application with weblogic server in eclipse. while running the project with the basic jsp, web xml,struts xml and action i am getting the below error ####<Feb 20, 2017 12:45:31 AM IST> <Error> <HTTP> <Gaurav-PC> <AdminServer> <[STANDBY] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1487531731340> <BEA-101371> <There was a failure when processing annotations for application D:\Eclipse Workspace

问题 A table about employees has following data: employee Id, employee name, their manager's Id and their team members' Id. Each employee would have multiple entries based on their team size. Say an employee with 5 other members in their team would have five rows with the employee and manager id repeated each with one team member's id. Sample table: employeeId | employeeName | managerId | teamEmployeeId | ------------------------------------------------------- 1000 | Alex | 4000 | 1101 | 1200 |

问题 Trying to update an inner array document. There are three levels of the nested array. I am able to remove till the second level but not able to update the third level { "id":"Test", "name":"Test", "sections":[ { "sectionname":"Example1", "sectionroles":["test1", "test2", "test3"], "subcategory":[ { "Value":"demo", "ValueId":"123333333333", "sectionroles":["test1", "test2", "test3"], }, { "Value":"Example2", "Value":"6577544333333", "sectionroles":["test1", "test2", "test3"], } ] } I am able

问题 Say I have following simple data structure. public class Player { private Long id; private String name; private Integer scores; //getter setter } So far so good. Now question is , how do I get what's a players rank? I have another data structure for ranking, that is- public class Ranking { private Integer score; private Integer rank; //getter/setter } So I have a list of player and i want to compute a list of ranking and I would like to use java8 stream api. I have a service named

问题 Jackson operates java.time.Instant with WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS ( READ_ as well) enabled by default. jackson-datatype-jsr310 It produces JSON like this { "createDate":1421261297.356000000, "modifyDate":1421261297.356000000 } In JavaScript it's much easier to get Date from traditional millis timestamp (not from seconds/nanos as above), like new Date(1421261297356) . I think there should be some reason to have the nanos approach by default, so what is that reason? 回答1: One way is

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I found it is possible to install JDK8 on Windows XP (to avoid install error - we have to change jdk-8u11-windows-i586.exe file with some HEX editor (for example free XVI32) and change string RegDeleteKeyExA with RegDeleteKeyA filling zeros instead two last letters). But I wonder if the JDK8 will work without

问题 Assuming I consume a Stream of entities from a source which I do not want to materialize, and I want to both transform the elements, and return some globally reduced value, what is the idiomatic way with java(8)? This is essentially trying to perform both a reduce() and a collect() . Example: class Person { public String firstname, public String lastname, public int age; } class TeamSummary { public List<String> fullnames, // firstname and lastname of all public Person oldest } public