javac : Compiling a .java file which uses other classes in it
HI i have 3 java files
a.java
b.java
c.java
I managed to generate .class files for both a and b using
javac example/a.java
javac example/b.java
but when i do the same for c.java I get the error error: cannot find symbol b and c
Any suggestions on how i could solve this problem ?
All the java files are in the same folder
You have to have classes a
and b
in your classpath when you try to compile class c
. This allows the compiler to verify that they exist, figure out what methods they have, etc.
javac
is pretty sensitive to package names and classpaths. The easiest thing to do is to compile all three at the same time like so javac example/a.java example/b.java example/c.java
.
If you go to the parent directory of example (let's call it src
), then you can run the following:
javac -cp src src/example/c.java
The reason you have to do it this way is because your classes have their packages listed as example
. Because of your package name, javac
is looking for the example
directory in its classpath, where it expects to find a.class
and b.class
.
Presumably you're not in the example/
directory when you run javac
. Try
javac -cp example c.java
Or just cd
into that directory. The classpath is not automatically resolved for the classes c.java
depends on.