cannot find symbol error while compiling a java class containing other class type object

问题

I have a java package which contains two classes. Class A and Class B. I need to create an object of A type in class B. I don't know what is happening. Please someone help me out.

package pack;

class A

class B

I'm using JDK1.5 and tomcat and placed them in java folder in my D drive.

D:\java\jdk1.5

D:\java\tomcat

Right now, my package folder is also in above location

D:\java\pack

Below is how i am compiling my java class files.

Step 1: Compiling A.java

D:\Java\pack>set path=D:\java\jdk1.5\bin (setting up path for jdk1.5 compiler)

D:\Java\pack>javac A.java (Successfuly compiled and formed A.class)

Step 1: Compiling B.java

D:\Java\pack>javac B.java (here, i get an error message )

Below is the ERROR message

Error Message

D:\Java\pack>javac B.java

B.java:9: cannot find symbol

symbol : class A

location: class pack.B

            A a = new A();    //creating an object of A type
            ^

B.java:9: cannot find symbol

symbol : class A

location: class pack.B

            A a = new A();      //creating an object of A type
                      ^

2 errors

回答1:

javac pack\A.java pack\B.java

will do the trick. The compiler has to be able to resolve everything in one invocation. If it's looking for

pack.B

then that corresponds to

pack\B.java

in the directory structure

来源：https://stackoverflow.com/questions/13472319/cannot-find-symbol-error-while-compiling-a-java-class-containing-other-class-typ