SootMethod sm = mi.next();
if (sm.isConcrete()) {
for (Unit unit : sm.getActiveBody().getUnits()) {
Stmt stmt = (Stmt) unit;
if (stmt.containsInvokeExpr()) {
InvokeExpr expr = stmt.getInvokeExpr();
if (expr instanceof SpecialInvokeExpr &&
expr.getMethod().getSignature().equals("<java.net.URL: void <init>(java.lang.String)>") &&
expr.getArg(0) instanceof StringConstant) {
Value value = ((SpecialInvokeExpr)expr).getBase();