完全随机区组分布--java实现

import java.util.*;

import java.io.*;

public class RandomCompleteBlockDesign {

    Random random = new Random();

    int ranNum = 0;

    int countNum = 0;

    int block = 0; // 区组

    int plotNum = 0; // 小区数目

    int[] scopeArray; // 记录所需要产生的plot数

    int[] randomArray; // 记录随机产生的plot序列

    int choice; // 记录结果的输出方向(1定向 到命令窗口，2为定向到文件）

    File output;

    public static void main(String[] args) {

        RandomCompleteBlockDesign rCBD = new RandomCompleteBlockDesign();

        PrintStream console = System.out; //重定向到默认输出，即命令提示符

        Scanner scan = new Scanner(System.in);

        System.out.println("please, input the blocks number: ");

        rCBD.block = scan.nextInt();

        System.out.println("please, input the plots number:");

        rCBD.plotNum = scan.nextInt();

        System.out.print("Print on the Command Window or Record in txt file!\n"

            + "1 for the Command Window.\n" + "2 for the text file.\n"

            + "input your choice!\n");

        rCBD.choice = scan.nextInt();

        if (rCBD.choice == 1) {

            rCBD.display();

        } else if (rCBD.choice == 2) {

            System.out

            .println("please, input the path of the file! such as c://javatest/randomdesign.txt");

            String path = scan.next();

            PrintStream ps = null;

            rCBD.output = new File(path);

            try {

                if (!rCBD.output.exists()) {

                    rCBD.output.createNewFile();

                }

                ps = new PrintStream(new FileOutputStream(rCBD.output));

                System.setOut(ps);

                rCBD.display();

            } catch (FileNotFoundException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            } catch (IOException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            } finally {

                if (ps != null) {

                        ps.close();

                }

            }

        } else {

            System.out.println("Restart the program!......");

        }

        System.setOut(console);

        System.out.println();

        System.out.println("================finish==============");

    }

    public void display() {

        createdPlot();

        for (int i = 0; i < block; i++) {

            createRandomPlot();

            System.out.println("The " + (i + 1)

            + " block's plots distribution!");

            for (int j = 1; j <= randomArray.length; j++) {

                System.out.print(randomArray[j - 1] + "\t");

                if (j % 10 == 0)

                    System.out.println();

                }

                randomArray = null;

             }

        }

    public void createRandomPlot() {

        randomArray = new int[plotNum];

        outerLoop: while (true) {

            ranNum = random.nextInt(plotNum);

            for (int i = 0; i < countNum; i++) {

                if (scopeArray[ranNum] == randomArray[i])

                    continue outerLoop;

                }

            randomArray[countNum] = scopeArray[ranNum];

            countNum++;

            if (countNum == plotNum)

                break;

            }

            countNum = 0;

        }

        public void createdPlot() {

            scopeArray = new int[plotNum];

            for (int i = 0; i < plotNum; i++) {

                scopeArray[i] = i + 1;

        }

    }

}