How do I define the index within the array?

How to change index of one row in an array to correspond to index of another row in another array?

• I have to write a program in Java in which user is prompted to enter name of student and scores. My output should display names of student in ascending order of their score. I can sort scores in ascending order but not able to figure out how to change student name sequence based on score. I am creating 2 arrays one for name of student and another for score. I can sort score array but don't know how to sort name array so that score and name match

• Answer:

  Try sorting your grades array manually (i.e. don't use the built-in sort method). As you are sorting your grades array, you will be swapping elements. You should simultaneously swap the elements in your student array. Here's the code. I took the BubbleSort code from GeekPedia[1]: import java.util.*; public class Project2 { public static void main (String [] args) { int[] grades = {99, 70, 66, 98, 82}; String[] students = { "Joe", "Bill", "Harry", "Tom", "Mary" }; System.out.println("Before sort:"); System.out.println(Arrays.toString(gr… System.out.println(Arrays.toString(st… bubbleSort(grades, students); System.out.println("After sort:"); System.out.println(Arrays.toString(gr… System.out.println(Arrays.toString(st… } //note: a is the grades array, b is the students array public static void bubbleSort(int[] a, String[] b) { int out, in; for(out=a.length-1; out>1; out--) for(in=0; in<out; in++) if( a[in] > a[in+1] ) { //swap them int temp = a[in]; a[in] = a[in+1]; a[in+1] = temp; //swap the student names too String stemp = b[in]; b[in] = b[in+1]; b[in+1] = stemp; } } // end bubbleSort() }