第一章 Java EE框架概述

来源：互联网发布：会c语言在哪里开发软件编辑：程序博客网时间：2024/05/15 13:52

1.Java分为三个体系，分别为Java SE（J2SE，Java2 Platform Standard Edition，标准版），JavaEE（J2EE，Java 2 Platform, Enterprise Edition，企业版），Java ME（J2ME，Java 2 Platform Micro Edition，微型版）。

2.练手的代码：

package ar;public class Student {private String sno,sname;private int score;public Student(String sno,String sname,int score){super();this.sno=sno;this.sname=sname;this.score=score;}public Student(){}public String getSno(){return this.sno;}public void setSno(String sno){this.sno=sno;}public String getSname(){return this.sname;}public void setSname(String sname){this.sname=sname;}public int  getScore(){return this.score;}public void setScore(int score){this.score=score;}public String toString(){return "学号："+sno+" 姓名："+sname+" 分数："+score;}}

package ar;import java.util.ArrayList;import java.util.Iterator;import java.util.List;public class ArrayListDemo {public static void main(String args[]){List list=new ArrayList();//默认list是object类型Student s1=new Student("1","shidadiao",25);Student s2=new Student("2","dickstar",22);Student s3=new Student("3","chenhong",23);Student s4=new Student("4","daijianhua",22);list.add(s1);list.add(s2);list.add(s3);list.add(s4);Iterator it=list.iterator();while(it.hasNext()){System.out.println(it.next());}for(int i=0;i<list.size();i++){Student s=(Student)list.get(i);System.out.println(s.getSno()+" "+s.getSname()+" "+s.getScore());}}}

package ar;import java.util.Iterator;import java.util.List;import java.util.ArrayList;public class ArrayListGeneric {public static void main(String args[]){List<Student> list=new ArrayList<Student>();Student s1=new Student("1","chenhong",2);Student s2=new Student("2","tom",3);Student s3=new Student("3","alice",3);list.add(s1);list.add(s2);list.add(s3);Iterator it=list.iterator();while(it.hasNext()){System.out.println(it.next());//System.out.println("----------------");}for(int i=0;i<list.size();i++){Student s=list.get(i);System.out.println(s.getSno()+" "+s.getSname()+" "+s.getScore());}}}

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