This is a RHEL 4 tracker.  There is a workaround (which is being applied).

With jdk-1.3.1 it's possible to use inner interfaces inside the package. GCC
does not compile the example below, but the jdk-1.3.1 does.

DisplayRenderer.java:
---------------------

  package test_pack;

  import test_pack.StyledText.*;

  class DisplayRenderer {
     StyledText text;

  DisplayRenderer(StyledText parent ) {
     text = parent;
  }

  protected void test() {
        LineCache lineCache; 
  }
  }

StyledText.java:
----------------

  package test_pack;

  public class StyledText {
        LineCache lineCache;

  public StyledText(int a){
  }

  public LineCache getCache() {
    return lineCache;
  }

  interface LineCache {

    public void calculate(int startLine, int lineCount);

  } // end LineCache 
  } // end StyledText

with 
  $ gcj -C test_pack/*.java

you get

  test_pack/DisplayRenderer.java:13: Type `LineCache' not
  found in the declaration
  of the local variable `lineCache'.
        LineCache lineCache;
           ^
  1 error

Release:
gcc 3.2 and gcc 3.1.1

Environment:
$ gcj -v
Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.2/specs
Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.2/../../../libgcj.spec
rename spec lib to liborig
Configured with: /netrel/src/gcc-3.2-1/configure
--enable-languages=c,c++,f77,java
--enable-libgcj --enable-threads=posix --with-system-zlib --enable-nls
--without-included-gettext --enable-interpreter --disable-sjlj-exceptions 
--disable-version-specific-runtime-libs --enable-shared --build=i686-pc-linux
--host=i686-pc-cygwin --target=i686-pc-cygwin --enable-haifa --prefix=/usr 
--exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib 
--includedir=/nonexistent/include --libexecdir=/usr/sbin
Thread model: posix
gcc version 3.2 20020818 (prerelease)

the same problem was seen with gcc-3.1.1 on linux

------- Comment #3 From Tom Tromey 2004-01-21 00:43 [reply] -------

FYI, you can work around this by writing "StyledText.LineCache"
instead of just "LineCache".  I realize this isn't always feasible though.