// Two more method examples with arrays. The first concats two arrays,
// The second takes two arrays and makes one hold the minimum values
// and the other take the maximum values of each pair of values.
import java.util.*;

public class ArrayMethodExamples {
   public static void main(String[] args){
      int[] a = {4, 6, 3, 5};
      int[] b = {3, 7, 4, 4};
      System.out.println("a = " + Arrays.toString(a));
      System.out.println("b = " + Arrays.toString(b));
      System.out.println();
      
      int[] combined = concat(a, b);
      System.out.println("combined = " + Arrays.toString(combined));
      System.out.println();

      
      minMax(a, b);
      System.out.println("a = " + Arrays.toString(a));
      System.out.println("b = " + Arrays.toString(b));
   }
   
   // This method takes two int[]'s and creates one
   // bigger array that has all the values from a and b. 
   public static int[] concat(int[] a, int[] b){
      int[] concatArray = new int[a.length + b.length];
      for(int i = 0; i < a.length; i++){
         concatArray[i] = a[i];
      }
      for(int i = 0; i < b.length; i++){
         concatArray[a.length  + i] = b[i];
      }
      return concatArray;
   }
   
   // This method looks at two int arrays of the same length
   // and for each pair of elements between the two arrays, it
   // puts the minumum one in array a and the max in array b.
   public static void minMax(int[] a, int[] b){
      for(int i = 0; i < a.length; i++){
         if(a[i] > b[i]){
            int temp = a[i];
            a[i] = b[i];
            b[i] = temp;
         }
      }
   }

}