java 请问编写自动脚本

2024-12-16 20:22:38
推荐回答(3个)
回答1:

完整代码:

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.regex.Pattern;

public class Number {

    /*
     * 编写自动脚本 在1-500的范围内生成随机整数 且不能为17的倍数 共生成1000000个数字 以英文逗号分隔,并去除以2开头以7结尾的数字
     */
    public void printNunmer() {

        List list = new ArrayList();
        // 以2开头
        String pattern0 = "^2[0-9]{0,2}$";
        // 以7结尾
        String pattern1 = "^[0-9]{0,2}7$";
        // 定义一个变量作为判断条件
        long i = 1;

        // 在循环里让i自增 当i>1000000 跳出循环
        while (i <= 1000000) {
            // 随机生成一个整数
            Integer content = new Random().nextInt(500);
            // 当该整数不是17的倍数并且不以2开头和或不以7结尾时 把该整数放入list中 并且让i自增
            if (!(content % 17 == 0 || Pattern.matches(pattern0, content + "")
                    || Pattern.matches(pattern1, content + ""))) {
                list.add(content);
                i++;
            }
        }
        for (Integer i1 : list) {
            System.out.print(i1 + ",");
        }
        System.out.println();
        System.out.println("一共有" + list.size() + "个数字");

    }

    public static void main(String[] args) {

        Number number = new Number();
        number.printNunmer();
    }
}

测试结果:

回答2:

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.Random;

public class Randomer {

    /**
     * 最大产生随机数数量
     */
    private final static int MAX_RANDOM_SIZE = 1000000;

    /**
     * 产生随机数范围
     */
    private final static int RANDOM_SEED = 500;

    /**
     * 分隔符
     */
    private final static String SPLIT = ",";

    /**
     * 结果输出路径
     */
    private final static String DATA_OUTPUT_PATH = "/Users/liuchongguang/Downloads/random_result.txt";

    /**
     * 换行符
     */
    private final static String CRLF = "\r\n";

    /**
     * 每行输出随机数个数
     */
    private final static int RANDOM_PER_LINE = 20;

    public static void main(String[] args) throws Exception {
        Random random = new Random();
        File file = new File(DATA_OUTPUT_PATH);
        if (file.exists()) {
            file.delete();
        }
        file.createNewFile();
        FileWriter fw = new FileWriter(file, false);
        BufferedWriter bw = new BufferedWriter(fw);
        int count = 0;
        while (count < MAX_RANDOM_SIZE) {
            int num = random.nextInt(RANDOM_SEED) + 1;
            String str = String.valueOf(num);
            if ((num % 17 != 0) && !str.startsWith("2") && !str.endsWith("7")) {
                count++;
                bw.write(str);
                if (count < MAX_RANDOM_SIZE) {
                    bw.write(SPLIT);
                    if (count % RANDOM_PER_LINE == 0) {
                        bw.write(CRLF);
                    }
                }
            }
        }
        bw.close();
        fw.close();
    }
}

回答3:

package eg;

import java.util.Random;

public class RandomNumber {

public static void main(String[] args) {
RandomNumber rn = new RandomNumber();
Rule rule = new Rule() {
@Override
protected boolean isAvailable(Integer number) {
if (number%17 != 0 && !number.toString().startsWith("2") && !number.toString().endsWith("7")) {
return true;
}
return false;
}
};
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < 1000000; i++) {
Integer num = rn.getRandomNumber(1, 500, rule);
if (buffer.length() == 0) {
buffer.append(num);
} else {
buffer.append(", " + num);
}
}
System.out.println(buffer.toString());
}


public Integer getRandomNumber(Integer min, Integer max, Rule rule) {
Random rdm = new Random();
Integer number = rdm.nextInt(max) + min;
if (rule.isAvailable(number)) {
return number;
} else {
return getRandomNumber(min, max, rule);
}
}

}

abstract class Rule {
protected abstract boolean isAvailable(Integer number);
}

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