job.setCombinerClass(WordCountReducer.class);
public static void main(String[] args) {
import java.lang.management.ManagementFactory;
new PerformanceOptimization("数据结构选择", "合适的数据结构可以提高存储和访问数据的效率/🥇【澳门一肖一码100%精准免费】🥇。"),
List<Student> students = new ArrayList<>();
public static void main(String[] args) {