diff -uNr jamvm-1.1.3/lib/java/lang/VMRuntime.java /home/mark/src/jamvm-1.1.3/lib/java/lang/VMRuntime.java
--- jamvm-1.1.3/lib/java/lang/VMRuntime.java	2004-03-24 04:42:54.000000000 +0100
+++ /home/mark/src/jamvm-1.1.3/lib/java/lang/VMRuntime.java	2004-04-22 18:33:54.000000000 +0200
@@ -38,6 +38,7 @@
 package java.lang;
 
 import java.io.File;
+import java.io.IOException;
 import java.util.Properties;
 
 /**
@@ -178,8 +179,10 @@
      * @return the newly created process
      * @throws NullPointerException if cmd or env have null elements
      */
-    static Process exec(String[] cmd, String[] env, File dir) {
-        throw new InternalError("unimplemented");
+    static Process exec(String[] cmd, String[] env, File dir)
+      throws IOException
+    {
+        return VMProcess.exec(cmd, env, dir);
     }
 
     /**