Seven Summit

Peak.java
 class Peak {
     String mountName;
     boolean bassList;
     boolean messnerList;
     double elevationMt;
     String country;
     String range;
     String continent;
     int firstAscent;
 }

SevenSummits.java
public class SevenSummits {
    public static void main(String[] args) {

        //https://en.wikipedia.org/wiki/Seven_Summits#The_Bass_and_Messner_lists

        //Tworzenie zmiennej typu obiektowego (deklaracja i inicjalizacja)

        Peak mountKosciuszko = new Peak(); //mountKosciuszko jest referencja na obiekt typu Peak
        Peak puncakJaya = new Peak();
        Peak mountVinson = new Peak();
        Peak mountElbrus = new Peak();
        Peak kilimanjaro = new Peak();
        Peak denali = new Peak();
        Peak aconcagua = new Peak();
        Peak mountEverest = new Peak();

        mountKosciuszko.mountName = "Mount Kosciuszko";
        mountKosciuszko.bassList = true;
        mountKosciuszko.messnerList = false;
        mountKosciuszko.elevationMt = 2.228;
        mountKosciuszko.range = "Great Dividing Range";
        mountKosciuszko.continent = "Australia";
        mountKosciuszko.country = "Australia";
        mountKosciuszko.firstAscent = 1840;

        puncakJaya.mountName = "Puncak Jaya" ;
        puncakJaya.bassList = false;
        puncakJaya.messnerList = true;
        puncakJaya.elevationMt = 4.884;
        puncakJaya.range = "Sudirman Range";
        puncakJaya.continent = "Australasia";
        puncakJaya.country = "Indonesia";
        puncakJaya.firstAscent = 1962;

        mountVinson.mountName = "Mount Vinson" ;
        mountVinson.bassList = true;
        mountVinson.messnerList = true;
        mountVinson.elevationMt = 4.892;
        mountVinson.range = "Sentinel Range";
        mountVinson.continent = "Antarctica";
        mountVinson.country = "-";
        mountVinson.firstAscent = 1966;

        mountElbrus.mountName = "Mount Elbrus" ;
        mountElbrus.bassList = true;
        mountElbrus.messnerList = true;
        mountElbrus.elevationMt = 5.642;
        mountElbrus.range = "Caucasus Mountains";
        mountElbrus.continent = "Europe";
        mountElbrus.country = "Russia";
        mountElbrus.firstAscent = 1840;

        kilimanjaro.mountName = "Kilimanjaro" ;
        kilimanjaro.bassList = true;
        kilimanjaro.messnerList = true;
        kilimanjaro.elevationMt = 5.895;
        kilimanjaro.range = "-";
        kilimanjaro.continent = "Africa";
        kilimanjaro.country = "Tanzania";
        kilimanjaro.firstAscent = 1889;

        denali.mountName = "Denali" ;
        denali.bassList = true;
        denali.messnerList = true;
        denali.elevationMt = 6.194;
        denali.range = "Alaska Range";
        denali.continent = "North America";
        denali.country = "United States";
        denali.firstAscent = 1913;

        aconcagua.mountName = "Aconcagua" ;
        aconcagua.bassList = true;
        aconcagua.messnerList = true;
        aconcagua.elevationMt = 6.961;
        aconcagua.range = "Andes";
        aconcagua.continent = "South America";
        aconcagua.country = "Argentina";
        aconcagua.firstAscent = 1897;

        mountEverest.mountName = "Mount Everest" ;
        mountEverest.bassList = true;
        mountEverest.messnerList = true;
        mountEverest.elevationMt = 8848;
        mountEverest.range = "Himalaya";
        mountEverest.continent = "Asia";
        mountEverest.country = "China/Nepal";
        mountEverest.firstAscent = 1953;

        String mountKosciuszkoInfo = "1. " + mountKosciuszko.mountName
                + ", Bass List: " + mountKosciuszko.bassList
                + ", Messner List: " + mountKosciuszko.messnerList
                + ", Elevation (Mt): " + mountKosciuszko.elevationMt
                + ", Range: " + mountKosciuszko.range
                + ", Continent: " + mountKosciuszko.continent
                + ", Country: " + mountKosciuszko.country
                + ", First Ascent: " + mountKosciuszko.firstAscent;

        String puncakJayaInfo = "2. " + puncakJaya.mountName
                + ", Bass List: " + puncakJaya.bassList
                + ", Messner List: " + puncakJaya.messnerList
                + ", Elevation (Mt): " + puncakJaya.elevationMt
                + ", Range: " + puncakJaya.range
                + ", Continent: " + puncakJaya.continent
                + ", Country: " + puncakJaya.country
                + ", First Ascent: " + puncakJaya.firstAscent;

        String mountVinsonInfo = "3. " + mountVinson.mountName
                + ", Bass List: " + mountVinson.bassList
                + ", Messner List: " + mountVinson.messnerList
                + ", Elevation (Mt): " + mountVinson.elevationMt
                + ", Range: " + mountVinson.range
                + ", Continent: " + mountVinson.continent
                + ", Country: " + mountVinson.country
                + ", First Ascent: " + mountVinson.firstAscent;

        String mountElbrusInfo ="4. " + mountElbrus.mountName
                + ", Bass List: " + mountElbrus.bassList
                + ", Messner List: " + mountElbrus.messnerList
                + ", Elevation (Mt): " + mountElbrus.elevationMt
                + ", Range: " + mountElbrus.range
                + ", Continent: " + mountElbrus.continent
                + ", Country: " + mountElbrus.country
                + ", First Ascent: " + mountElbrus.firstAscent;

        String kilimanjaroInfo = "5. " + kilimanjaro.mountName
                + ", Bass List: " + kilimanjaro.bassList
                + ", Messner List: " + kilimanjaro.messnerList
                + ", Elevation (Mt): " + kilimanjaro.elevationMt
                + ", Range: " + kilimanjaro.range
                + ", Continent: " + kilimanjaro.continent
                + ", Country: " + kilimanjaro.country
                + ", First Ascent: " + kilimanjaro.firstAscent;

        String denaliInfo = "6. " + denali.mountName
                + ", Bass List: " + denali.bassList
                + ", Messner List: " + denali.messnerList
                + ", Elevation (Mt): " + denali.elevationMt
                + ", Range: " + denali.range
                + ", Continent: " + denali.continent
                + ", Country: " + denali.country
                + ", First Ascent: " + denali.firstAscent;

        String aconcaguaInfo = "7. " + aconcagua.mountName
                + ", Bass List: " + aconcagua.bassList
                + ", Messner List: " + aconcagua.messnerList
                + ", Elevation (Mt): " + aconcagua.elevationMt
                + ", Range: " + aconcagua.range
                + ", Continent: " + aconcagua.continent
                + ", Country: " + aconcagua.country
                + ", First Ascent: " + aconcagua.firstAscent;

        String mountEverestInfo = "8. " + mountEverest.mountName
                + ", Bass List: " + mountEverest.bassList
                + ", Messner List: " + mountEverest.messnerList
                + ", Elevation (Mt): " + mountEverest.elevationMt
                + ", Range: " + mountEverest.range
                + ", Continent: " + mountEverest.continent
                + ", Country: " + mountEverest.country
                + ", First Ascent: " + mountEverest.firstAscent;

        System.out.println("Seven Summit List: ");
        System.out.println(mountKosciuszkoInfo);
        System.out.println(puncakJayaInfo);
        System.out.println(mountVinsonInfo);
        System.out.println(mountElbrusInfo);
        System.out.println(kilimanjaroInfo);
        System.out.println(denaliInfo);
        System.out.println(aconcaguaInfo);
        System.out.println(mountEverestInfo);

        System.out.println("Czy Mt Elbus jest wyższy od Mt Everest?: "
                + (mountElbrus.elevationMt>mountEverest.elevationMt));
        System.out.println("Czy Mt Elbus jest niższy od Mt Everest?: "
                + (mountElbrus.elevationMt<mountEverest.elevationMt));

        System.out.println("Czy zmienna mountElbrus jest typu Peak?");
        boolean isPeak = mountElbrus instanceof Peak;
        System.out.println(isPeak);

        // never ending CODE :D but it WORKS
    }
}