Java Error: bad source file: file does not contain class

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

What is the package declaration of QueryFeatureExtract ? Shouldn't you use -sourcepath gen-java/ instead of gen-java/query_feature/ ? — Raphaël
– Raphaël, Commented Jan 29, 2018 at 9:11
@Raphaël Use this, it will show error package QueryFeatureExtract does not exist.. the package declaration of QueryFeatureExtract is "package query_feature;" — danche
– danche, Commented Jan 29, 2018 at 9:15

Raphaël · Accepted Answer · 2018-01-29 09:34:07Z

2

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;

edited Jan 29, 2018 at 9:34

answered Jan 29, 2018 at 9:28

Raphaël

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2 Comments

danche Over a year ago

Thanks! It works! BUT the another error "Error: A JNI error has occurred, please check your installation and try again". Is this related to Class QueryFeatureExtract?

Raphaël Over a year ago

JNI means that your Java code is calling a C or C++ library. The library may have crashed or you may have path problems when launching your app. Since I don't now which file is using JNI, I can't tell you if it is related to QueryFeatureExtract.

HRgiger · Accepted Answer · 2018-01-29 09:00:04Z

0

Take a look this answer, You are just compiling ThriftClient, try this:

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

answered Jan 29, 2018 at 9:00

HRgiger

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4 Comments

HRgiger Over a year ago

@danche notice the star (*.java) at the end

HRgiger Over a year ago

@danche I thought your problem was QueryFeatureExtract.java? Dont you want to compile this class too?

danche Over a year ago

Yes, But it is same after compile it or not...when I put the ThriftClient.java under gen-java/query_feature, it will cause package QueryFeatureExtract does not exist error.. very confused...

HRgiger Over a year ago

@danche my bad i thought Thrift and Query classes is in same package

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