[plutonas@myhost java]$ javac lu/cs/co/graph/*.java
lu/cs/co/graph/Book.java:20: warning: unmappable character for encoding ASCII
 * <tr><td> jean8 <td>Les Mis?rables<td>Hugo
                             ^
lu/cs/co/graph/Book.java:28: warning: unmappable character for encoding ASCII
 * encoding. For example, F?lix Tholomy?s, the Parisian student from
                           ^
lu/cs/co/graph/Book.java:28: warning: unmappable character for encoding ASCII
 * encoding. For example, F?lix Tholomy?s, the Parisian student from
                                       ^
lu/cs/co/graph/Book.java:182: reference to PriorityQueue is ambiguous, both class lu.cs.co.util.PriorityQueue in lu.cs.co.util and class java.util.PriorityQueue in java.util match
      PriorityQueue P= new PriorityQueue(characters);
      ^
lu/cs/co/graph/Book.java:182: reference to PriorityQueue is ambiguous, both class lu.cs.co.util.PriorityQueue in lu.cs.co.util and class java.util.PriorityQueue in java.util match
FAIL!!!!!!!!!

a.util match
      PriorityQueue P= new PriorityQueue(MAX_N);
      ^
lu/cs/co/graph/Miles.java:185: reference to PriorityQueue is ambiguous, both class lu.cs.co.util.PriorityQueue in lu.cs.co.util and class java.util.PriorityQueue in java.util match
      PriorityQueue P= new PriorityQueue(MAX_N);
                           ^
lu/cs/co/graph/Miles.java:251: reference to PriorityQueue is ambiguous, both class lu.cs.co.util.PriorityQueue in lu.cs.co.util and class java.util.PriorityQueue in java.util match
                  P= new PriorityQueue(MAX_N);
                         ^
Note: lu/cs/co/graph/Viewer.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
5 errors
3 warnings