FULL PRODUCT VERSION :
java version "1.6.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-rc-b70)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b70, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [version 5.1.2600]


A DESCRIPTION OF THE PROBLEM :
The static methods datetFilter, regexFilter and numberFilter have a wrong return type (RowFilter<Object,Object>).

The real return type should be RowFilter<anytype,anytype>, one way to acheive this is to let the compiler infers the correct type.

regexFilter() should be typed as:
public static <M,I> RowFilter<M,I> regexFilter(String regex,int... indices) {
  ...
}

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
try to compile the test case

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
should compile.
ACTUAL -
see the error message

ERROR MESSAGES/STACK TRACES THAT OCCUR :
BugRowFilter.java:12: incompatible types
found : javax.swing.RowFilter<java.lang.Object,java.lang.Object>
required: javax.swing.RowFilter<javax.swing.table.TableModel,java.lang.Integer>
          RowFilter.regexFilter("a.*");
                               ^
Note: BugRowFilter.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.RowFilter;
import javax.swing.table.TableModel;

public class BugRowFilter {
    public static void main(String[] args) {
      RowFilter<TableModel,Integer> rowFilter=
          RowFilter.regexFilter("a.*");
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
add some casts :

RowFilter<TableModel,Integer> rowFilter=(RowFilter<TableModel,Integer>)
          (RowFilter<?,?>)RowFilter.regexFilter("a.*");