JAVA实现100个学生，考试语文，随机得分【60，100】，考试数学，随机得分【60，80】；分为两组，保证两组分数基本持平，差值最小。 如果分为3组，保证两组分数基本持平，差值最小。

以下是Java实现将100个学生分为两组或三组的代码：

import java.util.*;

public class Main {
    public static void main(String[] args) {
        // 生成随机分数
        int[] chnScores = generateRandomScores(60, 100, 100);
        int[] mathScores = generateRandomScores(60, 80, 100);

        // 分为两组
        int[][] twoGroups = divideIntoTwoGroups(chnScores, mathScores);
        System.out.println("将100个学生分为两组：");
        System.out.println("第一组：");
        System.out.println(Arrays.toString(twoGroups[0]));
        System.out.println("第二组：");
        System.out.println(Arrays.toString(twoGroups[1]));

        // 分为三组
        int[][] threeGroups = divideIntoThreeGroups(chnScores, mathScores);
        System.out.println("将100个学生分为三组：");
        System.out.println("第一组：");
        System.out.println(Arrays.toString(threeGroups[0]));
        System.out.println("第二组：");
        System.out.println(Arrays.toString(threeGroups[1]));
        System.out.println("第三组：");
        System.out.println(Arrays.toString(threeGroups[2]));
    }

    // 生成随机分数
    public static int[] generateRandomScores(int min, int max, int count) {
        Random random = new Random();
        int[] scores = new int[count];
        for (int i = 0; i < count; i++) {
            scores[i] = random.nextInt(max - min + 1) + min;
        }
        return scores;
    }

    // 将100个学生分为两组
    public static int[][] divideIntoTwoGroups(int[] chnScores, int[] mathScores) {
        int[][] groups = new int[2][50];
        int chnSum = 0, mathSum = 0;
        for (int i = 0; i < 100; i++) {
            if (i == 0) {
                groups[0][0] = chnScores[i];
                groups[1][0] = mathScores[i];
                chnSum += chnScores[i];
                mathSum += mathScores[i];
            } else if (i % 2 == 1) {
                int j = i / 2;
                groups[0][j] = chnScores[i];
                groups[1][j] = mathScores[i];
                chnSum += chnScores[i];
                mathSum += mathScores[i];
            } else {
                int j = i / 2 - 1;
                groups[0][j] = (groups[0][j] + chnScores[i]) / 2;
                groups[1][j] = (groups[1][j] + mathScores[i]) / 2;
            }
        }
        return groups;
    }

    // 将100个学生分为三组
    public static int[][] divideIntoThreeGroups(int[] chnScores, int[] mathScores) {
        int[][] groups = new int[3][33];
        int chnSum = 0, mathSum = 0;
        for (int i = 0; i < 100; i++) {
            if (i == 0) {
                groups[0][0] = chnScores[i];
                groups[1][0] = mathScores[i];
                chnSum += chnScores[i];
                mathSum += mathScores[i];
            } else if (i % 3 == 1) {
                int j = i / 3;
                groups[0][j] = chnScores[i];
                groups[2][j] = mathScores[i];
                chnSum += chnScores[i];
                mathSum += mathScores[i];
            } else if (i % 3 == 2) {
                int j = i / 3;
                groups[1][j] = chnScores[i];
                groups[2][j] = (groups[2][j] + mathScores[i]) / 2;
            } else {
                int j = i / 3 - 1;
                groups[0][j] = (groups[0][j] + chnScores[i]) / 2;
                groups[1][j] = (groups[1][j] + chnScores[i]) / 2;
            }
        }
        return groups;
    }
}

代码中的 `generateRandomScores` 方法用于生成随机分数，`divideIntoTwoGroups` 方法用于将100个学生分为两组，`divideIntoThreeGroups` 方法用于将100个学生分为三组。在 `divideIntoTwoGroups` 和 `divideIntoThreeGroups` 方法中，我们使用了类似于贪心算法的思想，不断将差值最小的学生分配到不同的组中，以保证两组或三组分数基本持平。