*/publicclassArrayListDemo1 {publicstaticvoidmain(String[] args) {//1、创建一个ArrayList的集合对象//ArrayList<String> list = new ArrayList<String>();//从jdk 1.7开始才支持的ArrayList list =newArrayList(); list.add("ctgu"); list.add(66); list.add("java"); System.out.println(list);//2...
publicclassStringDemo2{publicstaticvoidmain(String[]args){//目标:快速熟悉String提供的处理字符串的常用方法。Strings="黑马Java";// 1、获取字符串的长度System.out.println(s.length());// 2、提取字符串中某个索引位置处的字符charc=s.charAt(1);System.out.println(c);// 字符串的遍历for(inti=0;i...
*/ public class ArrayListDemo1 { public static void main(String[] args) { // 1、创建一个ArrayList的集合对象 // ArrayList<String> list = new ArrayList<String>(); // 从jdk 1.7开始才支持的 ArrayList<String> list = new ArrayList<>(); list.add("黑马"); list.add("黑马"); list.add("...
*/publicclassArrayListDemo1{publicstaticvoidmain(String[] args){// 1、创建一个ArrayList的集合对象// ArrayList<String> list = new ArrayList<String>();// 从jdk 1.7开始才支持的ArrayList<String> list =newArrayList<>(); list.add("黑马"); list.add("黑马"); list.add("Java"); System.out.pr...
java list 对象 中找出时间最大和最小的 java找出最大值,packagecom.day08;importcom.day08.javabean.Student;publicclassStudentTest3{publicstaticvoidmain(String[]args){//变量创建对象//创建一个拥有20个元素的学生对象,要求学号是1~20,姓名随机产生,年级1-6,分数
222 - Setup Sample Todo List Application 13:00 223 - Base Interface 13:30 224 - Add Change Listener 14:18 225 - Formatting Dates 07:04 226 - Singletons 15:06 227 - Load and Save ToDo Items fromto Disk 16:26 228 - Add DialogPane 16:32 229 - Show Dialog and Add Contro...
2. List 和 Map 的代码示例 2.1 List 示例 下面的代码示例展示了如何使用ArrayList来存储水果名称并遍历它们: importjava.util.ArrayList;importjava.util.List;publicclassListExample{publicstaticvoidmain(String[]args){List<String>fruits=newArrayList<>();// 添加元素fruits.add("Apple");fruits.add("Banana"...
Java中只有基本的数组类型支持原语类型（int/long/boolean/char etc）， 而其他的集合比如List，Map等...
百家姓字符串数组 代码语言:javascript 复制 privatestaticfinal String[]NAME_LIST={"赵","钱","孙","李","周","吴","郑","王","冯","陈","褚","卫","蒋","沈","韩","杨","朱","秦","尤","许","何","吕","施","张","孔","曹","严","华","金","魏","陶","姜","...
/*public String lineFistNameString(){ firstName = new BuildFirstName().insideFirstName(); lastName = new BuildLastName().insideLastName(); name = firstName + lastName; return name; }*/ /*随机生成多个人名,通过list实现*/ public ArrayList lineFistName String(int index){ ...