获取类中特定类型的所有实例

import java.util.ArrayList;
import java.util.List;

public class InstanceUtils {
    public static <T> List<T> getInstances(Class<T> clazz) {
        List<T> instances = new ArrayList<>();
        
        try {
            // 获取类的Class对象
            Class<?> cls = Class.forName(clazz.getName());
            
            // 创建类的实例
            T instance = clazz.newInstance();
            
            // 判断实例的类型是否符合要求
            if (instance instanceof clazz) {
                instances.add(instance);
            }
        } catch (ClassNotFoundException | IllegalAccessException | InstantiationException e) {
            e.printStackTrace();
        }
        
        return instances;
    }
}

List<MyClass> instances = InstanceUtils.getInstances(MyClass.class);