Roll Number and Marks Sorting

import java.util.*;
public class RollMarksSorting
{
    public static void main(String args[])
    {
        int size=0,rTemp=0;
        double mTemp=0;
        Scanner sc=new Scanner(System.in);
        System.out.print("Enter number of students: ");
        size=sc.nextInt();
        int roll[]=new int[size];
        double marks[]=new double[size];
        System.out.println("Enter Roll and Marks of the students:-");
        for(int i=0;i<size;i++)
        {
            roll[i]=sc.nextInt();
            marks[i]=sc.nextDouble();
            System.out.println();
        }
        for(int i=0;i<size-1;i++)
        {
            for(int j=0;j<size-i-1;j++)
            {
                if(marks[j]<marks[j+1])
                {
                    mTemp=marks[j];
                    marks[j]=marks[j+1];
                    marks[j+1]=mTemp;

                    rTemp=roll[j];
                    roll[j]=roll[j+1];
                    roll[j+1]=rTemp;
                }
            }
        }
        System.out.println("Sorted list:-");
        System.out.println("Roll\t\tMarks");
        for(int i=0;i<size;i++)
        {
            System.out.println(roll[i]+"\t\t"+marks[i]);
        }
    }
}