yurake/k8s-3tier-webapp

package webapp.tier.util;

import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

public final class CreateId {

    private CreateId() {
    }

    /**
     * 5桁の正の整数を返す.
     * @return 5桁の整数
     * @throws NoSuchAlgorithmException This exception is thrown when a particular cryptographic algorithm is requested but is not available in the environment.
     */
    public static int createid() throws NoSuchAlgorithmException {
        SecureRandom sr = SecureRandom.getInstanceStrong();
        int id = 0;
        while (id < 10000) {
            id = sr.nextInt(99999);
        }
        return id;
    }

    /**
     * 正負含む10桁の整数を返す.
     * @return 正負含む10桁の整数
     */
    public static int createwideid() {
        int length = 5;
        int id = 0;
        for (int i = 0; i <= length; i++) {
            id = id * 10 + (int) (Math.random() * 10); // 0~9の数値を入れる
        }
        return id;
    }
}