1import com.google.common.reflect.ClassPath;
2
3// package filter
4var packageName = "com.trychen.index";
5
6// get all class info
7var classInfos = ClassPath.from(loader)
8    .getAllClasses()
9    .stream()
10    .filter(clazz -> clazz.getPackageName().startsWith(packageName))
11    .collect(Collectors.toSet());
12    
13// load into class (exception may throw)
14var classes = classInfos.stream()
15    .map(ClassPath.ClassInfo::load)
16    .collect(Collectors.toSet());