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a calendar library
There is a newer version: 1.1.7
package com.tyme.sixtycycle;

import com.tyme.LoopTyme;
import com.tyme.culture.Ten;
import com.tyme.culture.Sound;
import com.tyme.culture.pengzu.PengZu;

/**
 * 六十甲子(六十干支周)
 *
 * @author 6tail
 */
public class SixtyCycle extends LoopTyme {

  public static final String[] NAMES = {"甲子", "乙丑", "丙寅", "丁卯", "戊辰", "己巳", "庚午", "辛未", "壬申", "癸酉", "甲戌", "乙亥", "丙子", "丁丑", "戊寅", "己卯", "庚辰", "辛巳", "壬午", "癸未", "甲申", "乙酉", "丙戌", "丁亥", "戊子", "己丑", "庚寅", "辛卯", "壬辰", "癸巳", "甲午", "乙未", "丙申", "丁酉", "戊戌", "己亥", "庚子", "辛丑", "壬寅", "癸卯", "甲辰", "乙巳", "丙午", "丁未", "戊申", "己酉", "庚戌", "辛亥", "壬子", "癸丑", "甲寅", "乙卯", "丙辰", "丁巳", "戊午", "己未", "庚申", "辛酉", "壬戌", "癸亥"};

  public SixtyCycle(int index) {
    super(NAMES, index);
  }

  public SixtyCycle(String name) {
    super(NAMES, name);
  }

  public static SixtyCycle fromIndex(int index) {
    return new SixtyCycle(index);
  }

  public static SixtyCycle fromName(String name) {
    return new SixtyCycle(name);
  }

  /**
   * 天干
   *
   * @return 天干
   */
  public HeavenStem getHeavenStem() {
    return HeavenStem.fromIndex(index % HeavenStem.NAMES.length);
  }

  /**
   * 地支
   *
   * @return 地支
   */
  public EarthBranch getEarthBranch() {
    return EarthBranch.fromIndex(index % EarthBranch.NAMES.length);
  }

  /**
   * 纳音
   *
   * @return 纳音
   */
  public Sound getSound() {
    return Sound.fromIndex(index / 2);
  }

  /**
   * 彭祖百忌
   *
   * @return 彭祖百忌
   */
  public PengZu getPengZu() {
    return PengZu.fromSixtyCycle(this);
  }

  /**
   * 旬
   *
   * @return 旬
   */
  public Ten getTen() {
    return Ten.fromIndex((getHeavenStem().getIndex() - getEarthBranch().getIndex()) / 2);
  }

  /**
   * 旬空(空亡)，因地支比天干多2个，旬空则为每一轮干支一一配对后多出来的2个地支
   *
   * @return 旬空(空亡)
   */
  public EarthBranch[] getExtraEarthBranches() {
    EarthBranch[] l = new EarthBranch[2];
    l[0] = EarthBranch.fromIndex(10 + getEarthBranch().getIndex() - getHeavenStem().getIndex());
    l[1] = l[0].next(1);
    return l;
  }

  public SixtyCycle next(int n) {
    return fromIndex(nextIndex(n));
  }

}