HW.zip_world

package hw; import java.util.ArrayList; import java.util.List; import java.util.Random; /* * @author Дмитрий */ public class HW { public static void main(String[] args) { /* List<Double> l = new ArrayList<Double>(); l.add(7.0); l.add(5.0); l.add(8.7); l.add(0.0); System.out.println(max(l,0,3)); Integer [] arr = {0,4,7,6}; for (int i = 0; i < arr.length; i++) { System.out.print(arr[i]+" "); } array(arr); System.out.println("\n"); for (int i = 0; i < arr.length; i++) { System.out.print(arr[i]+" "); }*/ } //1 public static int len(List<Object> l) { int count = 0; l.add(count); for (Object item : l) { count++; } return count; } public static int len2(List<?> l) { int count = 0; l.add(null); for (Object item : l) { count++; } return count; } //2___ //3 public static <T> T[] array(T[] arr) { Random rand = new Random(); int index = rand.nextInt(arr.length); int index2 = rand.nextInt(arr.length); System.out.println("индексы "+(index+1)+" "+(index2+1)); T temp = arr[index]; arr[index] = arr[index2]; arr[index2] = temp; return arr; } // 8 public static <T extends Object & Comparable<? super T>> T max(List<? extends T> list, int begin, int end) { T maxElem = list.get(begin); for (++begin; begin < end; ++begin) if (maxElem.compareTo(list.get(begin)) < 0) maxElem = list.get(begin); return maxElem; } }