lab1Metodai

import java.io.*;
import java.util.StringTokenizer;

public class Metodai {

    //metodas skaito duomenis is failo
    public static Gyvunas[] skaityti_sar (File file, int n){
        Gyvunas A[] = new Gyvunas [n]; //sukuriamas masyvo objektas
        String eilute;  // kintamasis 1 eilutei skaityti
        int sk = 0; //rasymo i masyva skaitliukas
        String pav, salis;
        int amzius;
        double svoris;

        try {
            BufferedReader file_in = new BufferedReader (new FileReader(file));
            while (true){

                if ((eilute = file_in.readLine()) == null) break;
                StringTokenizer st = new StringTokenizer(eilute);

                pav = st.nextToken();
                amzius = Integer.parseInt(st.nextToken());
                svoris = Double.parseDouble(st.nextToken());
                salis = st.nextToken();

                A[sk]= new Gyvunas (pav, amzius, svoris, salis);
                sk ++;
                if (sk==n) break;
            }
        }
        catch (IOException e) {System.out.println("Ivedimo klaida");}
        catch (IndexOutOfBoundsException e) {System.out.println("Masyvo ribu klaida");}

        return A;
    }

    //metodas suskaiciuoja kiek faile yra irasu eiluciu
    public static int skaiciuotiEilutes (File file) {
        int sk = 0;
        try {
            BufferedReader file_in = new BufferedReader (new FileReader (file));
            while (true){
                if ((file_in.readLine()) == null){
                    file_in.close();
                    return sk;}
                sk++;
            }
        }
        catch (IOException e) {System.out.println("Skaitymo is failo klaida");}
        return sk;
    }

    //metodas sukuria nauja, vienetu didesni masyva, nei buvo pries iterpima
    //ir i ji perkopijuoja pradinio masyvo duomenis
    public static Gyvunas[] kopijuotiMas(Gyvunas A[], int n){
        Gyvunas A2[] = new Gyvunas[n];
        for (int i=0; i<n-1; i++ )
            A2[i]=A[i];
        return A2;
    }

    public static Gyvunas[] iterpti(Gyvunas G[], int n){
        BufferedReader in = new BufferedReader (new InputStreamReader(System.in));
        String pav, salis;
        int amzius;
        double svoris;
        int vieta;

        while (true){
            System.out.println("Iveskite gyvuno pavadinima:");
            try {
                pav = in.readLine();
                break;
            }
            catch (IOException e) {System.out.println("Ivedimo klaida");}
        }

        while (true){
            System.out.println("Iveskite gyvuno amziu:");
            try {
                amzius = Integer.parseInt(in.readLine());
                break;
            }
            catch (IOException e) {System.out.println("Ivedimo klaida");}
            catch (NumberFormatException e) {System.out.println("Ivedet ne sveika skaiciu!");}
        }

        while (true){
            System.out.println("Iveskite gyvuno svori:");
            try {
                svoris = Double.parseDouble(in.readLine());
                break;
            }
            catch (IOException e) {System.out.println("Ivedimo klaida");}
            catch (NumberFormatException e) {System.out.println("Ivedet ne skaiciu!");}
        }

        while (true){
            System.out.println("Iveskite gyvuno kilmes sali:");
            try {
                salis = in.readLine();
                break;
            }
            catch (IOException e) {System.out.println("Ivedimo klaida");}
        }

        Gyvunas naujas = new Gyvunas(pav, amzius, svoris, salis);

        while (true){
            System.out.println("Masyve yra " + (n-1) + " elementu. Iveskite i kuria vieta iterpti nauja gyvuna(1 - "+ n +"):");
            try {
                vieta = Integer.parseInt(in.readLine());
                if (vieta > n) System.out.println("Ivedete per dideli skaiciu!");
                else if (vieta < 1) System.out.println("Ivedete per maza skaiciu!");
                else break;
            }
            catch (IOException e) {System.out.println("Ivedimo klaida");}
            catch (NumberFormatException e) {System.out.println("Ivedet ne sveika skaiciu!");}
        }

        for (int i=n-1; i>vieta-1; i--)
            G[i]=G[i-1];
        G[vieta-1]=naujas;

        return G;
    }

    public static Gyvunas[] salinti(Gyvunas G[], int n, int vieta){
        for (int i=vieta; i<n; i++)
            G[i]=G[i+1];
        return G;
    }

    //Metodas suranda sunkiausia gyvuna ir ji iraso naujame masyve
    public static Gyvunas[] surasti (Gyvunas G[], int n){
        Gyvunas A[] = new Gyvunas[1]; //sukuriam nauja 1 iraso masyva, nes surasim tik 1 gyvuna
        Gyvunas max = G[0];
        for (int i=1; i<n; i++)
            if (max.gautiSvori()<G[i].gautiSvori()) max = G[i];
        A[0]=max;
        return A;
    }

    public static void spausdinti_sar_faile (PrintWriter rasyti, Gyvunas [] A, int n) {
        if (n > 0) {
            spausdinti_antraste_faile (rasyti);
            rasyti.println("*************************************************************");
            for (int i=0; i<n; i++) {
                rasyti.println("* " + prailginti((i+1)+"", 3) +" * "+prailginti(A[i].gautiPav(),15)+ " * "+ prailginti(A[i].gautiAmziu()+"", 6)+
                        " * " + prailginti(A[i].gautiSvori()+"", 6) + " * " + prailginti(A[i].gautiSali(), 15) + " *");
            }
            rasyti.println("*************************************************************");
        }
        else rasyti.println("Masyvas tuscias!");
    }

    public static void spausdinti_antraste_faile (PrintWriter rasyti){
        rasyti.println("*************************************************************");
        rasyti.println("* Nr. *   Pavadinimas   * Amzius * Svoris *  Kilmes salis   *");
    }

    public static void spausdinti_sar_ekrane ( Gyvunas [] A, int n) {
        if (n > 0) {
            spausdinti_antraste_ekrane ();
            System.out.println("*************************************************************");
            for (int i=0; i<n; i++) {
                System.out.println("* " + prailginti((i+1)+"", 3) +" * "+prailginti(A[i].gautiPav(),15)+ " * "+ prailginti(A[i].gautiAmziu()+"", 6)+
                        " * " + prailginti(A[i].gautiSvori()+"", 6) + " * " + prailginti(A[i].gautiSali(), 15) + " *");
            }
            System.out.println("*************************************************************");
        }
        else System.out.println("Masyvas tuscias!");
    }

    public static void spausdinti_antraste_ekrane (){
        System.out.println("*************************************************************");
        System.out.println("* Nr. *   Pavadinimas   * Amzius * Svoris *  Kilmes salis   *");
    }

    public static String prailginti (String reiksme, int ilgis){
        for (int i=reiksme.length(); i<ilgis; i++)
            reiksme += " ";
        return reiksme;
    }

    //Metodas suranda sunkesnius gyvunus uz duota svori
    public static Gyvunas[] surastiGyvunus (Gyvunas[] A,int n){
        BufferedReader in = new BufferedReader (new InputStreamReader(System.in));
        double minSvoris;
        while (true) {
            System.out.println("Iveskite gyvuno svori:");
            try {
                minSvoris = Double.parseDouble(in.readLine());
                break;
            } catch (IOException e) {
                System.out.println("Ivedimo klaida");
            } catch (NumberFormatException e) {
                System.out.println("Ivedet ne skaiciu!");
            }
        }
        int naujasKiekis = 0;
        for (int i=n-1; i>=0; i--){
            if (A[i].gautiSvori()>=minSvoris) {
             naujasKiekis++;
            }
        }
        int j=0;
        Gyvunas[] B = new Gyvunas[naujasKiekis];
        for (int i=n-1; i>=0; i--){
            if (A[i].gautiSvori()>=minSvoris) {
                B[j]= A[i];
              j++;

            }
        }
        return B;
    }

    public static void meniu () {
        //Isvalom ekrana
        /*for (int i =0; i<=80; i++ )
            System.out.println("\n");*/
        System.out.println("Programos Lab1 veiksmu meniu");
        System.out.println("----------------------------");
        System.out.println("1. Skaityti duomenis.");
        System.out.println("2. Spausdinti i faila.");
        System.out.println("3. Iterpti.");
        System.out.println("4. Istrinti.");
        System.out.println("5. Surasti.");
        System.out.println("6. SurastiGyvunus.");
        System.out.println("7. Baigti darba.");
        System.out.println("----------------------------");
        System.out.println("Iveskite pasirinkto veiksmo nr.:");
    }


}