Prep for JDK 1.4.

Note: I did a complete scan of the code.  Mostly it the version checks are
safe (e.g., things not supported with 1.1).  The only place where it wasn't
obvious to me was RMIC, but it seemed OK.


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269132 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Javac.java

@@ -438,7 +438,8 @@ public class Javac extends MatchingTask {
 
         String compiler = project.getProperty("build.compiler");
         if (compiler == null) {
-            if (Project.getJavaVersion().startsWith("1.3")) {
+            if (Project.getJavaVersion() != Project.JAVA_1_1 &&
+                Project.getJavaVersion() != Project.JAVA_1_2) {
                 compiler = "modern";
             } else {
                 compiler = "classic";

src/main/org/apache/tools/ant/taskdefs/optional/Javah.java

@@ -276,7 +276,8 @@ public class Javah extends Task {
 
         String compiler = project.getProperty("build.compiler");
         if (compiler == null) {
-            if (Project.getJavaVersion().startsWith("1.3")) {
+            if (Project.getJavaVersion() != Project.JAVA_1_1 &&
+                Project.getJavaVersion() != Project.JAVA_1_2) {
                 compiler = "modern";
             } else {
                 compiler = "classic";