计算数组 集合 最大值算法

package cn.gls.jdk18;

import java.util.*;

public class LargestTest {

    public static void main(String[] args) {

        Integer[] arr = {1,2,3,4,5,6,7};
         Integer largest =  max(arr);
        System.out.println(largest);
        List<Integer> list  = new ArrayList<>();
        list.add(11);
        list.add(9);
        list.add(7);
        list.add(5);
        list.add(3);
        Integer max = max(list);
        System.out.println(max);

    }
    
    static <T extends Comparable> T max(T[] a){
         if(a.length<=0){
             throw new NoSuchElementException();
         }
         T largest = a[0];
         for(int i = 0;i<a.length;i++){
             if(largest.compareTo(a[i])<0){
                 largest = a[i];
             }
         }
        return  largest;
    }





    public static <T extends Comparable> T max(Collection<T> c){
         if(c.isEmpty()){
             throw new NoSuchElementException();
         }
         Iterator<T> iter =  c.iterator();
         T largest = iter.next();
         while (iter.hasNext()){
             T next = iter.next();
             if(largest.compareTo(next)<0){
                 largest = next;
             }
         }
        return  largest;
    }




}