编写一个Java项目，模拟一次包括老师备课，同学上课，布置作业和做作业的课堂教学过程。作业为判断字符串是否为2-重复串及其他字符串操作内容。-Write a Java program, a simulation including teacher preparation, school students, classroom assignments and homework in the teaching process. Job to determine whether the string