can't access class in same package-CodePudding

Project directory:
 Project
 -[other directories]
 -bin
 --A.java
 --B.java

Class A source code:

package bin;
public class A{
 public static void main(String[] args){
  B use=new B("Hello");
  use.run();
 }
}

Class B source code:

package bin;
public class B{
 static String x=null;
 public B(String text){
  x=text;
 }
 public static void run(){
  System.out.println(x);
 }
}

There was no error when I compiled B.java, when I tried to compile A.java, I got:

A.java:4: error: cannot find symbol
     B use=new B("Hello");
  symbol:   class B
  location: class A
search.java:4: error: cannot find symbol
     B use=new B("Hello");
           ^
  symbol:   class B
  location: class A

By the way, I am not using an IDE to compile this, I just edited the files with Geany and nano, then tried to compile them from the terminal with javac.

CodePudding user response：

As pointed out by @Alex, you are most likely executing javac command inside bin folder. The right way to compile the program in your situation is to run the javac command int project folder

javac bin/A.java

and to run

java bin/A

CodePudding user response：

Assuming the current working directory is Project, the code shold be compiled as:

Project> java bin/*.java

This compiles all classes in bin into the same directory:

Project> dir bin
13.02.2022  18:20    <DIR>          .
13.02.2022  18:20    <DIR>          ..
13.02.2022  18:20               346 A.class
13.02.2022  18:14               117 A.java
13.02.2022  18:20               478 B.class
13.02.2022  18:14               154 B.java
               4 files          1 095 bytes

Run the code providing the package name in the class bin.A:

Project> java bin.A
Hello

However, to avoid mess in the source folder bin where the .class files are created by the compiler along with the .java source files, it would be better to provide a separate directory (e.g. classes) and refer it providing classpath parameter -cp:

Project>javac -d classes bin/*.java

Project>java -cp classes bin.A
Hello