随机取值，无法输出，不知错在哪里

Question

public class enums {

public static String enumValue(String type) {
    String val = "";
    String[] origins = {"VISIT", "RECOMMEND", "LEAFLET", "ACTIVITY", "MEDIA", "MESSAGE", "NET", "PHONESALE", "FRIENDS", "OTHERS"};
    String[] educations = {"DOCTOR", "POST_GRADUATE", "COLLEGE", "JUNIOR_COLLEGE", "HIGH_SCHOOL", "MIDDLE_SCHOOL", "SECONDARY_SCHOOL"};
    if (type.equalsIgnoreCase("origin")) {
        val = origins[(int) (Math.random() * origins.length)];
    } else if (type.equalsIgnoreCase("education")) {
        val = educations[(int) (Math.random() * educations.length)];

    }
    return val;
}
public static void main(String[] args) {
    String sourceId = enumValue("educations");

    System.out.println("名单来源是"+sourceId);
}

}

Answer 1

 /* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static String enumValue(String type) {
        String val = "";
        String[] origins = {"VISIT", "RECOMMEND", "LEAFLET", "ACTIVITY", "MEDIA", "MESSAGE", "NET", "PHONESALE", "FRIENDS", "OTHERS"};
        String[] educations = {"DOCTOR", "POST_GRADUATE", "COLLEGE", "JUNIOR_COLLEGE", "HIGH_SCHOOL", "MIDDLE_SCHOOL", "SECONDARY_SCHOOL"};
        if (type.equalsIgnoreCase("origin")) {
            val = origins[(int) (Math.random() * origins.length)];
        } else if (type.equalsIgnoreCase("education")) {
            val = educations[(int) (Math.random() * educations.length)];

        }
        return val;
    }
    public static void main(String[] args) {
        String sourceId = enumValue("education");

        System.out.println("名单来源是"+sourceId);
    }
}

education多了一个s
名单来源是DOCTOR

https://ideone.com/IkeOaq