根据用户输入将人员平均分配到组中

Question

ReadFile randomGenerate = new ReadFile();
Input userNum = new Input();
String classnum = userNum.fileToSelect();
int lineNumber = randomGenerate.lineCounter(classnum);
//number of students in classnum.txt
ArrayList<String> people = randomGenerate.readPeople();
//a string of names(first word on each row)
int userPut = userNum.numInput();
int maxNum = lineNumber/userPut;

对不对，我正在读一个txt文件——每行的第一个单词是一个人的名字。我想把这个ArrayList的人分成偶数组，组的数量基于用户输入。

int[] numbers = RandomNumbersWithoutRepetition(0, lineNumber, lineNumber);       
//an array of numbers IN ORDER
int[] randomNumbers = RandomizeArray(numbers);
//shuffles the array

我按顺序生成了一组数字，然后对它们进行混洗，效果很好。

但是，我对人进行分组的方法是基于ifelse条件，这些条件不太好用。那么，有没有一种有效的方法可以将这个ArrayList名称放入用户想要的组中呢？

Answer 1

我有x的学生数量。

我有n数量的组。

我认为没有其他标准可以将学生分组。

基本上，你把小组的数量分成学生的数量。是的，你必须处理剩余部分。但这很简单。

以下是测试结果。我创造了53名学生，并对他们进行了洗牌。然后我把学生分成4组。我手动格式化输出以适应答案。第一组有14名学生，其余各组有13名学生。

Students: 42, 27, 5, 26, 32, 30, 44, 10, 17, 29, 40, 52, 
47, 38, 49, 18, 46, 24, 34, 12, 13, 53, 35, 20, 1, 
2, 41, 23, 43, 28, 8, 11, 50, 37, 9, 7, 48, 3, 33, 
25, 31, 15, 22, 21, 14, 45, 36, 16, 51, 19, 4, 6, 39
Group 1: 42, 27, 5, 26, 32, 30, 44, 10, 17, 29, 40, 52, 47, 38
Group 2: 49, 18, 46, 24, 34, 12, 13, 53, 35, 20, 1, 2, 41
Group 3: 23, 43, 28, 8, 11, 50, 37, 9, 7, 48, 3, 33, 25
Group 4: 31, 15, 22, 21, 14, 45, 36, 16, 51, 19, 4, 6, 39

这是代码。CCD_ 3和CCD_。

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class StudentGroups {
public static void main(String[] args) {
int numberOfGroups = 4;
int numberOfStudents = 53;
StudentGroups sg = new StudentGroups(numberOfStudents);
sg.printStudents();
List<List<Integer>> groups = sg.groupStudents(
numberOfGroups);
sg.printGroups(groups);
}
private List<Integer> students;
public StudentGroups(int numberOfStudents) {
students = new ArrayList<>(numberOfStudents);
for (int i = 0; i < numberOfStudents; i++) {
students.add(i + 1);
}
Collections.shuffle(students);
}
public void printStudents() {
System.out.print("Students: ");
for (int i = 0; i < students.size(); i++) {
System.out.print(students.get(i));
if (i < (students.size() - 1)) {
System.out.print(", ");
}
}
System.out.println();
}
public List<List<Integer>> groupStudents(int groups) {
List<List<Integer>> output = new ArrayList<>();
int size = students.size();
int group = size / groups;
int remainder = size % groups;
sortStudents(output, size, group, remainder);
return output;
}
private void sortStudents(List<List<Integer>> output, 
int size, int group, int remainder) {
List<Integer> list = new ArrayList<>();
int count = 0;
for (int i = 0; i < size; i++) {            
list.add(students.get(i));
if (count == 0 && remainder > 0) {
if (group > 0) {
list.add(students.get(++i));
}
remainder--;
}
if (++count >= group) {
addList(output, list);
list = new ArrayList<>();
count = 0;
}
}
addList(output, list);
}
private void addList(List<List<Integer>> output, 
List<Integer> list) {
if (list.size() > 0) {
output.add(list);
}
}
public void printGroups(List<List<Integer>> groups) {
for (int j = 0; j < groups.size(); j++) {
System.out.print("Group ");
System.out.print(j + 1);
System.out.print(": ");
List<Integer> students = groups.get(j);
for (int i = 0; i < students.size(); i++) {
System.out.print(students.get(i));
if (i < (students.size() - 1)) {
System.out.print(", ");
}
}
System.out.println();
}
}
}