Java错误：源文件错误：文件不包含类

Question

The directory of QueryFeatureExtract.java is like

gen-java/
└── query_feature
    └── QueryFeatureExtract.java

and the java file ThriftClient.java which use QueryFeatureExtract is in the same folder with gen-java , I want to compile Client.java with

javac -classpath libthrift-0.9.1.jar:slf4j.jar -sourcepath gen-java/query_feature/ ThriftClient.java

Then the error shows

ThriftClient.java:16: error: cannot access QueryFeatureExtract
            QueryFeatureExtract.Client client = new QueryFeatureExtract.Client(protocol);
            ^
  bad source file: gen-java/query_feature/QueryFeatureExtract.java
    file does not contain class QueryFeatureExtract
    Please remove or make sure it appears in the correct subdirectory of the sourcepath.
1 error

Answer 1

Assuming your files are like this:

./
└── ThriftClient.java
└── gen-java/
|   └── query_feature/
|       └── QueryFeatureExtract.java
└── libthrift-0.9.1.jar
└── slf4j.jar

And QueryFeatureExtract begins with the following package declaration:

package query_feature;

You should use the following command to compile ThriftClient.java :

javac -classpath .:libthrift-0.9.1.jar:slf4j.jar:gen-java ThriftClient.java

You can specify folders with -classpath , you don't need to use -sourcepath . Don't forget to add . to your class path if you have other java files in the current folder. To avoid errors since you have a source path containing an other source path, I would recommand moving ThriftClient.java into a folder named src .

If it does not work, check that ThriftClient is importing QueryFeatureExtract with the correct import:

import query_feature.QueryFeatureExtract;

Answer 2

看看这个答案 ，您正在编译ThriftClient，请尝试以下操作：

javac -classpath libthrift-0.9.1.jar:slf4j.jar -sourcepath gen-java/query_feature/ *.java