update swig on windows

winx64/bin/swigwin-4.0.0/Examples/test-suite/java/virtual_poly_runme.java

@@ -0,0 +1,61 @@
+// virtual_poly test
+
+import virtual_poly.*;
+
+public class virtual_poly_runme {
+
+  static {
+    try {
+	System.loadLibrary("virtual_poly");
+    } catch (UnsatisfiedLinkError e) {
+      System.err.println("Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" + e);
+      System.exit(1);
+    }
+  }
+
+  public static void main(String argv[]) {
+
+    NDouble d = new NDouble(3.5);
+    NInt i = new NInt(2);
+
+    //
+    // These two natural 'copy' forms fail because no covariant (polymorphic) return types 
+    // are supported in Java. 
+    //
+    // NDouble dc = d.copy();
+    // NInt ic = i.copy();
+
+    //
+    // Unlike C++, we have to downcast instead.
+    //
+    NDouble dc = (NDouble)d.copy();
+    NInt ic = (NInt)i.copy();
+
+    NDouble ddc = NDouble.narrow(dc);
+    NInt dic = NInt.narrow(ic);
+
+    virtual_poly.incr(ic);
+    if ( (i.get() + 1) != ic.get() )
+      throw new RuntimeException("incr test failed");
+
+    //
+    // Checking a pure user downcast
+    //
+    NNumber n1 = d.copy();
+    NNumber n2 = d.nnumber();
+    NDouble dn1 = NDouble.narrow(n1);
+    NDouble dn2 = NDouble.narrow(n2);
+
+    if ( (dn1.get()) != dn2.get() )
+      throw new RuntimeException("copy/narrow test failed");
+
+    //
+    // Checking the ref polymorphic case
+    //
+    NNumber nr = d.ref_this();
+    NDouble dr1 = NDouble.narrow(nr);
+    NDouble dr2 = (NDouble)d.ref_this();
+    if ( dr1.get() != dr2.get() )
+      throw new RuntimeException("copy/narrow test failed");
+  }
+}