Java面试经典问题.zip

package Collection; import java.util.ArrayList; import java.util.Collections; public class Comparator { public static void main(String[] args) { ArrayList<Integer> list = new ArrayList<>(); list.add(-1); list.add(3); list.add(3); list.add(-5); list.add(7); list.add(4); list.add(-9); list.add(-7); System.out.println("原始数组："); System.out.println(list); Collections.reverse(list); System.out.println("逆序："); System.out.println(list); Collections.sort(list); System.out.println("自然排序："); System.out.println(list); Collections.sort(list, new java.util.Comparator<Integer>() { @Override public int compare(Integer o1, Integer o2) { return o2.compareTo(o1); } }); System.out.println("定制排序："); System.out.println(list); } }