Javac does not behave as as expected in pit build 77. In previous build and tiger release, Javac compiles a source file and put the corresponding class under the same directory as the source file. For example, suppose a class's full name is com.example.A, its source file A.java is under
/com/exmple/A.java. If we use previous builds and releases to compile it:
javac A.java
it will generate A.class and put it under the same directory. While with this build, javac puts A.class under /com/exmple/com/examples directory which extends /com/example where A.java resides.
This bug has severely influenced the existing tests and caused many of the tests fail.
To reproduce:

1.mkdir sqetest
2.copy the following code to Sample.java under sqetest:
-------------
package sqetest;
public class Sample {
   public static void main(String[] args) {
      System.out.println("where is the test class file");
   }
}
-------------
3. compile with promoted build b76:
The Sample.class will be put under sqetest : sqetest/Sample.class.
4. compile with pit build 77:
The Sample.class will be put under sqetest/sqetest: sqetest/sqetest/Sample.class