java作业，用饿汉模式产生班长，模拟班会举行

public class Monitor {
private static final Monitor instance = new Monitor();
private String name;
private List<Student> students;

private Monitor() {
this.name = "张三";
this.students = new ArrayList<>();
students.add(new Student("李四"));
students.add(new Student("王五"));
students.add(new Student("赵六"));
students.add(new Student("小明"));
students.add(new Student("小红"));
}

public static Monitor getInstance() {
return instance;
}

public void conductMeeting() {
System.out.println("班长" + name + "主持班会：");
for (Student student : students) {
student.listenMeeting();
}
}
}

class Student {
private String name;

public Student(String name) {
this.name = name;
}

public void listenMeeting() {
System.out.println(name + "听取班长讲话");
}
}

class Test {
public static void main(String[] args) {
Monitor monitor = Monitor.getInstance();
monitor.conductMeeting();
}
}