package com.bjsxt.chap7; import java.util.*; public class TestList { public static void main(String[] args) { List l1 = new LinkedList(); for (int i = 0; i <= 5; i++) { l1.add("a" + i); } System.out.println(l1); l1.add(3, "a100"); System.out.println(l1); l1.set(6, "a200"); System.out.println(l1); System.out.print((String)l1.get(2) + " "); System.out.println(l1.indexOf("a3")); l1.remove(1); System.out.println(l1); System.out.println("--------------------------"); List L1 = new LinkedList(); List L2 = new LinkedList(); for (int i = 0; i <= 9; i++) { L1.add("a" + i); } System.out.println(L1); Collections.shuffle(L1); // 随机 System.out.println(L1); Collections.reverse(L1); // 逆序 System.out.println(L1); Collections.sort(L1); // 排序 System.out.println(L1); System.out.println(Collections.binarySearch(L1, "a5")); } }