Eclipse可以编译但不能在命令行中进行编译（javac）

Question

I'd like to know the way to compile a project which has a dependency.

package a;
import b.B;
class A{
    B b;
}
package b;
import a.A;
class B{
    A a;
}

I have a project which has a dependency like the one seen above.

I tried to compile with javac (in jdk ). I've already used the -classpath option, but it doesn't work.

I heard Apache Ant supply this and maybe eclipse uses it. So I think there is no reason that it isn't possible only with java compiler.

I'd like to know the way to compile this with javac (in command line) and, if you know, how apache ant and eclipse work together to compile. Could you tell me the reason??

Answer 1

I wonder how can Eclipse compile your code. Mine can only if I modify the class visibility to public:

a/A.java

package a;

import b.B;

public class A {
    B b;
}

b/B.java

package b;

import a.A;

public class B {
    A a;
}

Compiling from the command line is easy then:

javac a/A.java b/B.java