COmo puedo meter un arreglo burbuja en este programa?? es en java

Question

public class Calculadora {
 public static void main(String []agrs)
    {
        Scanner in=new Scanner(System.in);
        int op=0;
        double n1,n2,s,m,d,r,p,me,ma;
        do{
            System.out.print(" Calculadora \n");
            System.out.print("[1] SUMAR\n");
            System.out.print("[2] RESTAR\n");
            System.out.print("[3] MULTIPLICAR\n");
            System.out.print("[4] Modulo\n");
            System.out.print("[5]Promedio\n");
             System.out.print("[6]Mayor\n");
            System.out.print("[7] SALIR\n");
            System.out.print("Ingresa una opcion:");
            op=in.nextInt();
            switch(op)
            {
                case 1:
                    System.out.print("Ingrese numero 1:");
                    n1=in.nextDouble();
                    System.out.print("Ingrese numero 2:");
                    n2=in.nextDouble();
                    s=n1+n2;
                    System.out.print("La suma es:"+s);
                    break;
                case 2:
                    System.out.print("Ingrese numero 1:");
                    n1=in.nextDouble();
                    System.out.print("Ingrese numero 2:");
                    n2=in.nextDouble();
                    r=n1-n2;
                    System.out.print("La resta es:"+r);
                    break;
                case 3:
                    System.out.print("Ingrese numero 1:");
                    n1=in.nextDouble();
                    System.out.print("Ingrese numero 2:");
                    n2=in.nextDouble();
                    m=n1*n2;
                    System.out.print("La multiplicacion es:"+m);
                    break;
                case 4:
                    System.out.print("Ingrese numero 1:");
                    n1=in.nextDouble();
                    System.out.print("Ingrese numero 2:");
                    n2=in.nextDouble();
                    d=n1/n2;
                    System.out.print("La division es:"+d);
                    break;
                case 5:
                 System.out.print("Ingrese numero 1:");
                    n1=in.nextDouble();
                    System.out.print("Ingrese numero 2:");
                    n2=in.nextDouble();
                    p=(n1+n2)/2;
                    System.out.print("La division es:"+p);
                    break;
                case 6:
            }
        }while(op!=5);
    }
}