Menghitung Segitiga Sama Kaki Dalam Java menggunakan menu pilihan

import java.io.*;
public class uts {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        BufferedReader hitung = new BufferedReader(new InputStreamReader(System.in));
        double alas,tinggi,luas,keliling,miring;
        String a="", t="", cari="";
        int x;
        try
        {
            System.out.println("               MENU UTAMA             ");
            System.out.println("======================================");
            System.out.println("1. Cari Sisi Miring Segitiga Sama Kaki");
            System.out.println("2. Hitung Luas Segitiga Sama Kaki");
            System.out.println("3. Hitung Keliling Segitiga Sama Kaki");
            System.out.println("======================================");
            System.out.print("Pilihan Anda : ");
            cari = hitung.readLine();
            System.out.println("");
            x = Integer.parseInt(cari);
            if (x == 1)
            {
                System.out.print("Masukkan Nilai Alas : ");
                a = hitung.readLine();
                System.out.print("Masukkan Nilai Tinggi : ");
                t = hitung.readLine();
                alas = Double.parseDouble(a);
                tinggi = Double.parseDouble(t);
                miring = ((alas*alas)+(tinggi*tinggi));
                System.out.println("Sisi Miring Segitiga = " + Math.sqrt(miring));
            }
            else if (x == 2)
            {
                System.out.print("Masukkan Nilai Alas : ");
                a = hitung.readLine();
                System.out.print("Masukkan Nilai Tinggi : ");
                t = hitung.readLine();
                alas = Double.parseDouble(a);
                tinggi = Double.parseDouble(t);
                luas = 0.5 * alas * tinggi;
                System.out.println("Luas Segitiga = " + luas);
            }
            else if (x == 3)
            {
                System.out.print("Masukkan Nilai Alas : ");
                a = hitung.readLine();
                System.out.print("Masukkan Nilai Tinggi : ");
                t = hitung.readLine();
                alas = Double.parseDouble(a);
                tinggi = Double.parseDouble(t);
                miring = ((alas*alas)+(tinggi*tinggi));
                keliling = (2*miring)+alas;
                System.out.println("Keliling Segitiga = " + keliling);
            }
            else
            {
                System.out.println("Maaf Pilihan Anda tidak Tersedia !!!!");
            }
        }
        catch (IOException e)
        {
            System.out.println("Error");
        }
    }

}