Basic Javac question. Not seeing other classes, in same dir.

Question

Hey, I wrote a Java program that has 3 classes. When, I use javac, I am getting errors whenever my main class attempts to interact with the other classes. Is there anything special that I need to do? I am just calling javac Main.java. Any help would be greatly appreciated.

Edit:

    DFA myDFA = new DFA();
    String test = args[0];
    if(myDFA.accept(test))

and the error is:

Main.java:19: cannot find symbol symbol: class DFA location class dfa.Main

^ I have 3 of those errors

Answer 1

Yes, you need to specify the classpath using the -classpath option on javac when you compile.

Try compiling like this:

javac -classpath . *.java

Note the 'dot' after -classpath. It tells the compiler to look in the current directory to find any .java files that it needs.

If you need other paths or JARs, you have to make sure that they appear in the -classpath as well.

Answer 2

You need to to compile the classes indivdually i.e. javac class1.java javac class2.java javac class2.java

etc.

and then execute as

java cp . MainClass.Main

Answer 3

first, use an IDE. don't do cmd line.

if you use javac, you should give it all source files that should be compiled

javac Main.java DFA.java ... 

javac *.java

javac -sourcepath .  Main.java 

again, get an IDE, don't do cmd line.