void (String name) { int lastDotIndex = name.lastIndexOf('.'); if (lastDotIndex == -1) { return; } String packageName = name.substring(0, lastDotIndex); // check if the package is already loaded if (isPackageDefined(packageName)) { return; } try { definePackage(packageName, null, null, null, null, null, null, null); } catch (IllegalArgumentException ignore) { // do nothing, the package is already defined by another thread } }