Fix package imports, copy over the elevator functions

java/net/i2p/router/Elevator.java

@@ -0,0 +1,29 @@
+package net.i2p.router;
+
+import com.sun.jna.WString;
+import com.sun.jna.platform.win32.Kernel32;
+import com.sun.jna.platform.win32.Kernel32Util;
+
+public class Elevator {
+    public static void main(String... args) {
+        executeAsAdministrator("c:\\windows\\system32\\notepad.exe", "");
+    }
+
+    public static void executeAsAdministrator(String command, String args) {
+        Shell32X.SHELLEXECUTEINFO execInfo = new Shell32X.SHELLEXECUTEINFO();
+        execInfo.lpFile = new WString(command);
+        if (args != null)
+            execInfo.lpParameters = new WString(args);
+        execInfo.nShow = Shell32X.SW_SHOWDEFAULT;
+        execInfo.fMask = Shell32X.SEE_MASK_NOCLOSEPROCESS;
+        execInfo.lpVerb = new WString("runas");
+        boolean result = Shell32X.INSTANCE.ShellExecuteEx(execInfo);
+
+        if (!result) {
+            int lastError = Kernel32.INSTANCE.GetLastError();
+            String errorMessage = Kernel32Util.formatMessageFromLastErrorCode(lastError);
+            throw new RuntimeException("Error performing elevation: " + lastError + ": " + errorMessage + " (apperror="
+                    + execInfo.hInstApp + ")");
+        }
+    }
+}

java/net/i2p/router/Shell32X.java

@@ -1,3 +1,5 @@
+package net.i2p.router;
+
 import java.util.*;
 
 import com.sun.jna.Native;