gcj give errors

[nmarrocc@xxxxxxx]

i can compile fine with javac, but when i try to compile with gcj i get on
every line. Heres an example:

$ gcj -c -g -O FloatSum.java
FloatSum.java:8: error: Identifier expected.
public static Stack<Float> P;
                      ^
FloatSum.java:9: error: syntax error.
public static Stack<Float> N;
                 ^
FloatSum.java:10: error: syntax error.
public static Stack<Float> P2;
                 ^
FloatSum.java:11: error: syntax error.
public static Stack<Float> N2;
                 ^
FloatSum.java:12: error: syntax error.
public static Stack<Float> E;
                 ^
FloatSum.java:13: error: .
public static  class ReducedNumber {
                        ^
FloatSum.java:13: error: .
public static  class ReducedNumber {
          ^
FloatSum.java:17: error: .
public static class DeflatedNumber {
                       ^
FloatSum.java:17: error: .
public static class DeflatedNumber {
          ^
FloatSum.java:21: error: syntax error.
        public static void main(String args[]) {
                         ^
FloatSum.java:22: error: Class or interface declaration expected.
                N = new Stack<Float>();
                   ^
FloatSum.java:23: error: Class or interface declaration expected.
                P = new Stack<Float>();
                   ^
FloatSum.java:24: error: Class or interface declaration expected.
                P2 = new Stack<Float>();
                   ^
FloatSum.java:25: error: Class or interface declaration expected.
                N2 = new Stack<Float>();
                   ^
FloatSum.java:26: error: Class or interface declaration expected.
                E = new Stack<Float>();


Thanks for the help