jmu-Java-02基本语法-08-ArrayList入门，如何掌握？

本文共计244个文字，预计阅读时间需要1分钟。

javaimport java.util.ArrayList;import java.util.Scanner;

public class Main { private static Scanner in;

public static void main(String[] args) { in=new Scanner(System.in); ArrayList strList=new ArrayList(); while (true) { String s=in.nextLine(); if (s.equals(end)) break; strList.add(s); } for (String str : strList) { System.out.println(str); } }}

gistfile1.txt

import java.util.ArrayList; import java.util.Scanner; public class Main { private static Scanner in; public static void main(String[] args) { in=new Scanner(System.in); ArrayList strList=new ArrayList<>(); while (true) { String s=in.next(); while(!s.equals("!!end!!")) { strList.add(s); s=in.next(); } if(strList.size()>0) { strList.add(0,"begin"); strList.add(strList.size(),"end"); } System.out.println(strList); String str=in.next(); int a; a=strList.indexOf(str); if(a>=0) { System.out.println("true"); System.out.println(a); System.out.println(strList.lastIndexOf(str)); } else { System.out.println("false"); System.out.println(a); } System.out.println(strList.get(0)); strList.remove(0); System.out.println(strList); str=in.next(); strList.set(1,str); System.out.println(strList); str=in.next(); ArrayList strList1=new ArrayList<>(); for (String e:strList) { if(e.indexOf(str)>=0) strList1.add(e); } System.out.println(strList1); a=strList.indexOf(str); if(a>=0) strList.remove(a); System.out.println(strList); strList.clear(); System.out.println(strList+" "+strList.size()+","+strList.isEmpty()); } } }