NEED HELP WITH THIS

Write a program that inputs 5 student's names and grades (into two arrays), sorts the two arrays on the basis of the grade (highest to lowest), and then prints out the names and grades sorted this way.

//arrays for names
String names []= new String[5];
System.out.println ("enter the name of 5 students");

for(int number=0; number<5;number++)

System.out.println ("enter thegrades for the 5 students");

for(int number=0; number<5;number++)

for (int number=0; number<=4;number++)
}

//method for sorting the numbers
static void selectionSort(int mix[])
{
int Max1;
int Max2;

for (int i=mix.length-1; i>=1; i--)
{
// the maximum in the list[0..i]
Max1 = mix[i];
Max2 = i;

for (int j=i-1; j>=0; j--)
{
if (Max1 > mix[j])
{
Max1 = mix[j];
Max2 = j;
}
}

// Swap list[i] with list[Max2] if necessary;
if (Max2 != i)
{
mix[Max2] = mix[i];
mix[i] = Max1;
}
}

}
}

================================
I enter

1-alex 10
2-maria 20
3-john 30
4-felix 40
5-tria 50

and i get

1-alex 50
2-maria 40
3-john 30
4-felix 20
5-tria 10

this is wrong becasue its suppost to be