Examples of com.ibm.icu.impl.CalendarAstronomer$MoonAge

com.ibm.icu.impl.CalendarAstronomer
mazon.com/exec/obidos/ISBN=0521356997" target="_top"> Practical Astronomy With Your Calculator, by Peter J. Duffett-Smith, Cambridge University Press, 1990. This is an excellent book, and if you want a greater understanding of how these calculations are performed it a very good, readable starting point.
WARNING: This class is very early in its development, and it is highly likely that its API will change to some degree in the future. At the moment, it basically does just enough to support {@link com.ibm.icu.util.IslamicCalendar}and {@link com.ibm.icu.util.ChineseCalendar}. @author Laura Werner @author Alan Liu @internal

        bcal.add(Calendar.MONTH, 1);
        /*Date d = */bcal.getTime();


        // CalendarAstronomer
        // (This class should probably be made package-private.)
        CalendarAstronomer astro = new CalendarAstronomer();
        /*String s = */astro.local(0);


        // ChineseCalendar
        ChineseCalendar ccal = new ChineseCalendar(TimeZone.getDefault(),
                                                   Locale.getDefault());
        ccal.add(Calendar.MONTH, 1);

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    static final double PI = Math.PI;


    public void TestSolarLongitude() {
        GregorianCalendar gc = new GregorianCalendar(new SimpleTimeZone(0, "UTC"));
        CalendarAstronomer astro = new CalendarAstronomer();
        // year, month, day, hour, minute, longitude (radians), ascension(radians), declination(radians)
        final double tests[][] = {
            { 1980, 7, 27, 00, 00, 2.166442986535465, 2.2070499713207730, 0.3355704075759270 },
            { 1988, 7, 27, 00, 00, 2.167484927693959, 2.2081183335606176, 0.3353093444275315 },
        };
        logln("");
        for (int i = 0; i < tests.length; i++) {
            gc.clear();
            gc.set((int)tests[i][0], (int)tests[i][1]-1, (int)tests[i][2], (int)tests[i][3], (int) tests[i][4]);


            astro.setDate(gc.getTime());


            double longitude = astro.getSunLongitude();
            if (longitude != tests[i][5]) {
                if ((float)longitude == (float)tests[i][5]) {
                    logln("longitude(" + longitude +
                            ") !=  tests[i][5](" + tests[i][5] +
                            ") in double for test " + i);
                } else {
                    errln("FAIL: longitude(" + longitude +
                            ") !=  tests[i][5](" + tests[i][5] +
                            ") for test " + i);
                }
            }
            Equatorial result = astro.getSunPosition();
            if (result.ascension != tests[i][6]) {
                if ((float)result.ascension == (float)tests[i][6]) {
                    logln("result.ascension(" + result.ascension +
                            ") !=  tests[i][6](" + tests[i][6] +
                            ") in double for test " + i);

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        }
    }


    public void TestLunarPosition() {
        GregorianCalendar gc = new GregorianCalendar(new SimpleTimeZone(0, "UTC"));
        CalendarAstronomer astro = new CalendarAstronomer();
        // year, month, day, hour, minute, ascension(radians), declination(radians)
        final double tests[][] = {
            { 1979, 2, 26, 16, 00, -0.3778379118188744, -0.1399698825594198 },
        };
        logln("");


        for (int i = 0; i < tests.length; i++) {
            gc.clear();
            gc.set((int)tests[i][0], (int)tests[i][1]-1, (int)tests[i][2], (int)tests[i][3], (int) tests[i][4]);
            astro.setDate(gc.getTime());


            Equatorial result = astro.getMoonPosition();
            if (result.ascension != tests[i][5]) {
                if ((float)result.ascension == (float)tests[i][5]) {
                    logln("result.ascension(" + result.ascension +
                            ") !=  tests[i][5](" + tests[i][5] +
                            ") in double for test " + i);

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            }
        }
    }


    public void TestCoordinates() {
        CalendarAstronomer astro = new CalendarAstronomer();
        Equatorial result = astro.eclipticToEquatorial(139.686111 * PI/ 180.0, 4.875278* PI / 180.0);
        logln("result is " + result + ";  " + result.toHmsString());
    }

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    }


    public void TestCoverage() {
        GregorianCalendar cal = new GregorianCalendar(1958, Calendar.AUGUST, 15);
        Date then = cal.getTime();
        CalendarAstronomer myastro = new CalendarAstronomer(then);


        //Latitude:  34 degrees 05' North
        //Longitude:  118 degrees 22' West
        double laLat = 34 + 5d/60, laLong = 360 - (118 + 22d/60);
        CalendarAstronomer myastro2 = new CalendarAstronomer(laLong, laLat);


        double eclLat = laLat * Math.PI / 360;
        double eclLong = laLong * Math.PI / 360;
        Ecliptic ecl = new Ecliptic(eclLat, eclLong);
        logln("ecliptic: " + ecl);


        CalendarAstronomer myastro3 = new CalendarAstronomer();
        myastro3.setJulianDay((4713 + 2000) * 365.25);


        CalendarAstronomer[] astronomers = {
            myastro, myastro2, myastro3, myastro2 // check cache


        };


        for (int i = 0; i < astronomers.length; ++i) {
            CalendarAstronomer astro = astronomers[i];


            logln("astro: " + astro);
            logln("   time: " + astro.getTime());
            logln("   date: " + astro.getDate());
            logln("   cent: " + astro.getJulianCentury());
            logln("   gw sidereal: " + astro.getGreenwichSidereal());
            logln("   loc sidereal: " + astro.getLocalSidereal());
            logln("   equ ecl: " + astro.eclipticToEquatorial(ecl));
            logln("   equ long: " + astro.eclipticToEquatorial(eclLong));
            logln("   horiz: " + astro.eclipticToHorizon(eclLong));
            logln("   sunrise: " + new Date(astro.getSunRiseSet(true)));
            logln("   sunset: " + new Date(astro.getSunRiseSet(false)));
            logln("   moon phase: " + astro.getMoonPhase());
            logln("   moonrise: " + new Date(astro.getMoonRiseSet(true)));
            logln("   moonset: " + new Date(astro.getMoonRiseSet(false)));
            logln("   prev summer solstice: " + new Date(astro.getSunTime(CalendarAstronomer.SUMMER_SOLSTICE, false)));
            logln("   next summer solstice: " + new Date(astro.getSunTime(CalendarAstronomer.SUMMER_SOLSTICE, true)));
            logln("   prev full moon: " + new Date(astro.getMoonTime(CalendarAstronomer.FULL_MOON, false)));
            logln("   next full moon: " + new Date(astro.getMoonTime(CalendarAstronomer.FULL_MOON, true)));
        }


    }

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        throws IOException, ClassNotFoundException
    {
        stream.defaultReadObject();
        
        /* set up the transient caches... */
        astro = new CalendarAstronomer();
        winterSolsticeCache = new CalendarCache();
        newYearCache = new CalendarCache();
    }

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        zoneAstro = CHINA_ZONE;


        stream.defaultReadObject();


        /* set up the transient caches... */
        astro = new CalendarAstronomer();
        winterSolsticeCache = new CalendarCache();
        newYearCache = new CalendarCache();
    }

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        throws IOException, ClassNotFoundException
    {
        stream.defaultReadObject();
        
        /* set up the transient caches... */
        astro = new CalendarAstronomer();
        winterSolsticeCache = new CalendarCache();
        newYearCache = new CalendarCache();
    }

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        throws IOException, ClassNotFoundException
    {
        stream.defaultReadObject();
        
        /* set up the transient caches... */
        astro = new CalendarAstronomer();
        winterSolsticeCache = new CalendarCache();
        newYearCache = new CalendarCache();
    }

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        throws IOException, ClassNotFoundException
    {
        stream.defaultReadObject();
        
        /* set up the transient caches... */
        astro = new CalendarAstronomer();
        winterSolsticeCache = new CalendarCache();
        newYearCache = new CalendarCache();
    }

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com.ibm.icu.util.ChineseCalendar

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