Java類常量

我想定義一個類的一些公共類常量變量我也創建一個實例。Java類常量

在我的類中響應我已經定義了一些responseCodes，我想在整個應用程序中使用它作爲常量。

請不要擔心這段代碼的意義，這只是片段的複製和粘貼，以顯示我如何使用類常量。

我的IntelliJ不抱怨這種語法可言，但是當我試圖建立的代碼，我得到

Filter.java:[84,36] cannot find symbol 
symbol : variable BR_PARTIALLY_OK

我與consts

package xx.xx.xxxxx.connector; 

import java.util.HashMap; 
import java.util.List; 
import java.util.Map; 

public class Response { 
    public static final int BR_OK      = 200; 
    public static final int BR_PARTIALLY_OK    = 250; 
    public static final int BR_NOT_AUTHORIZED   = 401; 
    public static final int BR_REQUEST_TIMEOUT   = 408; 
    public static final int BR_NOT_IMPLEMENTED   = 501; 
    public static final int BR_SERVICE_UNAVAILABLE  = 503; 

    private Map<String, List<String>> headers = new HashMap<String, List<String>>(); 
    private String body = null; 

    public void addHeader(String key, List<String> value) { 
     this.headers.put(key, value); 
    } 

    public String getBody() { 
     return body; 
    } 

    public void setBody(String body) { 
     this.body = body; 
    } 

    public Map<String, List<String>> getHeaders() { 
     return headers; 
    } 
}

期望中的例子使用的示例類另一個類

package xx.xx.xxxxx.filter; // other package, other maven artifact but depends response package 
import xx.xx.xxxxx.connector.Response; 

public class Filter { 
    public int doFilter(Service service) { 
     Response myResponse = service.post(..); 
     return Response.BR_PARTIALLY_OK; 
    } 
}

我也試過

import static xxx.xxx.Response.*

或

import static xxx.xxx.Response.BR_PARTIALLY_OK;

和進口

我見過的接口和常量類的例子，但我已經使用

return BR_PARTIALLY_OK

相同的「無法找到符號」錯誤'd想知道爲什麼這個例子不起作用

編輯：也許問題是這個類是在一個相關的工件中定義的？

的pom.xml

<?xml version="1.0"?> 
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" 
     xmlns="http://maven.apache.org/POM/4.0.0" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> 
    <modelVersion>4.0.0</modelVersion> 
    <parent> 
     <groupId>xxx.xxxxx.xxx</groupId> 
     <artifactId>connector</artifactId> 
     <version>1.0-SNAPSHOT</version> 
    </parent> 
    <groupId>used the Response.BR_PARTIALLY_OK constant here</groupId> 
    <artifactId>filter</artifactId> 
    <version>${connector.filter.version}</version> 

    <dependencies> 
     <dependency> 
      <groupId>defined the Response class in this artifact</groupId> 
      <artifactId>component</artifactId> 
      <version>1.0-SNAPSHOT</version> 
     </dependency>   

     <dependency> 
      <groupId>info.magnolia</groupId> 
      <artifactId>magnolia-core</artifactId> 
      <version>4.5.4</version> 
      <scope>provided</scope> 
     </dependency> 

     <dependency> 
      <groupId>net.sourceforge.openutils</groupId> 
      <artifactId>openutils-log4j</artifactId> 
      <version>2.0.5</version> 
      <scope>provided</scope> 
     </dependency> 

     <dependency> 
      <groupId>javax.servlet</groupId> 
      <artifactId>servlet-api</artifactId> 
      <version>2.4</version> 
      <scope>provided</scope> 
     </dependency> 

     <dependency> 
      <groupId>javax.servlet</groupId> 
      <artifactId>jsp-api</artifactId> 
      <version>2.0</version> 
      <scope>provided</scope> 
     </dependency> 

     <!-- Testing Dependencies --> 
     <dependency> 
      <groupId>org.mockito</groupId> 
      <artifactId>mockito-all</artifactId> 
      <version>1.9.5</version> 
      <scope>test</scope> 
     </dependency> 

     <dependency> 
      <groupId>junit</groupId> 
      <artifactId>junit</artifactId> 
      <version>${junit.version}</version> 
      <scope>test</scope> 
     </dependency> 
    </dependencies> 

    <repositories> 
     <repository> 
      <id>magnolia.public</id> 
      <url>http://nexus.magnolia-cms.com/content/groups/public</url> 
      <snapshots> 
       <enabled>true</enabled> 
      </snapshots> 
     </repository> 
    </repositories> 
</project>

來源

2012-11-13 Michel Feldheim

待辦事項你在IntelliJ裏面或者在單獨的版本中得到「無法找到符號」？ –

你可以通過Classname.staticvariable使用靜態變量，你不需要導入。變量可用於整個應用程序。 – Raghunandan

我在Intellij中使用了maven編譯 –