Cannot find class in package when compiling with javac

Question

I have the following structure in my directory :

PROJECT
  - classes
      tunnelvisionlabs
          postgresql
              PostgreSqlLexer.class
              PostgreSqlLexerAtnSimulator.class
              PostgreSqlLexerUtils.class
  - lib
      antlr-4-7.jar

  - BasicTest.java

In BasicTest.java, i have these imports:

package com.tunnelvisionlabs.postgresql.test;

import com.tunnelvisionlabs.postgresql.PostgreSqlLexer;
import com.tunnelvisionlabs.postgresql.PostgreSqlLexerUtils;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.Lexer;
import org.antlr.v4.runtime.Token;
import org.junit.Assert;
import org.junit.Test;

I try to compile with the following command :

javac -cp .:./lib/* BasicTests.java

I get these errors :

BasicTests.java:28: error: cannot find symbol
import com.tunnelvisionlabs.postgresql.PostgreSqlLexer;
                                      ^
  symbol:   class PostgreSqlLexer
  location: package com.tunnelvisionlabs.postgresql
BasicTests.java:29: error: cannot find symbol
import com.tunnelvisionlabs.postgresql.PostgreSqlLexerUtils;
                                      ^
  symbol:   class PostgreSqlLexerUtils
  location: package com.tunnelvisionlabs.postgresql

In the PostgreSqlLexer and PostgreSqlLexerUtils classes, i have this package declared at the beginning:

package com.tunnelvisionlabs.postgresql;

What do i need to do for my program to find these classes ? I tried adding the classes directory in lib and using the same command as before, so that the classpath also contains the classes directory, but it doesn't change anything.

From which exact location are you running `javac`? – Tim Biegeleisen Nov 23 '17 at 11:32 — Tim Biegeleisen, Nov 23 '17 at 11:32
From the PROJECT directory, where BasicTest.java is – StuYYY Nov 23 '17 at 11:45 — StuYYY, Nov 23 '17 at 11:45

score 0 · Answer 1 · answered Nov 23 '17 at 11:52

If I read your project structure correctly, the source folder where BasicTest.java sits is at the same level as the lib folder. If so, then you can using the following javac classpath:

javac -cp .:lib/* BasicTests.java
            ^^^ lib/ is already where you are calling this

Review the following reference answer for more information:

Including all the jars in a directory within the Java classpath

Cannot find class in package when compiling with javac

1 Answers1