I have two java files (A.java + B.java) in src/com/example
A.java
package com.example;
public class A {
public void sayHello(){
System.out.println("Hello");
}
}
B.java
package com.example;
public class B{
public static void main(String... args) {
A a = new A();
a.sayHello();
}
}
If I cd to one level above src and type javac -d classes src/com/example/B.java
I get an error saying cannot find symbol A?
解决方案
javac doesn't know where to find source class you have to specify it with -sourcepath option.
See:
C:\example>mkdir src
C:\example>type > src/
C:\example>mkdir src\com\example
C:\example>more > src\com\example\A.java
package com.example;
public class A {
}
^C
C:\example>more > src\com\example\B.java
package com.example;
public class B {
A a;
}
^C
C:\example>javac -d
C:\example>mkdir classes
C:\example>javac -d classes src\com\example\B.java
src\com\example\B.java:3: cannot find symbol
symbol : class A
location: class com.example.B
A a;
^
1 error
C:\example>javac -d classes -sourcepath src src\com\example\B.java
C:\example>