JAVA 面向对象( 类和对象）
基本概念：
面向对象是一种新兴的程序设计方法,或者是一种新的程序设计规范(paradigm),其基本思想是使用对象、类、继承、封装、消息等基本概念来进行程序设计。
例题：
<pre>
1个班有４个小组，每个小组有３学生
要求：
1）输入班级名，能查询到其下的所有小组名及每个小组的学生信息，展示如下：
你查询的班级名为"ＬＯＬ"：
|—— 第一组，输出组
|——剑圣
|—— 剑姬
|—— 剑豪
|—— 第二组，辅助组
|—— 狗头
|—— 牛头
|—— 石头
|—— 第三组，中单组
|—— 卡特
|—— 卡牌
|—— 安妮
|—— 第四组，ＡＤＣ组
|—— 小炮
|—— 女警
|—— 薇恩
2）输入指定小组名，能查询到其下的所有学生信息
你查询的小组名为"ADC组"：
|—— 小炮
|—— 女警
|—— 薇恩
3）输入指定学生名，能查询到器所属的小组信息机班级信息！
你查询的小组名为"薇恩"：所在小组为“ADC组”，所在班级为“ＬＯＬ”！
</pre>
思路：首先找出三个类模型：班级、小组、学生
其次 写一个主调方法类
班级类
public class Class {
public String name ;
public Group[] groups;
public void queryTeamAndStudentInfo() {
for (Group group : groups) {
System.out.println("|—— " + group.name);
for (Student student : group.students) {
System.out.println("\t|—— " + student.name);
}
}
}
public void queryStudentInfo(String studentName) {
boolean flag = false;
Group belongTeam = null;
for (Group team : groups) {
for (Student student : team.students) {
if (student.name.equals(studentName)) {
flag = true;
belongTeam = team;
break;
}
}
}
if (flag) {
System.out.println("你查询的学生名为“" + studentName + "”：所在小组为“" + belongTeam.name + "”，所在班级为“" + name + "”！");
} else {
System.out.println("你查询的学生不存在！");
}
}
}
小组类
public class Group {
public String name ;
public Student[] students;
public void queryStudentInfo() {
for (Student student : students) {
System.out.println("|—— " + student.name);
}
}
}
学生类
public class Student {
public String name ;
}
主调用方法类：
public class Main {
public Class initData(){
Student student1 = new Student();
student1.name = "剑圣";
Student student2 = new Student();
student2.name = "剑姬";
Student student3 = new Student();
student3.name = "剑豪";
Student student4 = new Student();
student4.name = "狗头";
Student student5 = new Student();
student5.name = "石头";
Student student6 = new Student();
student6.name = "牛头";
Student student7 = new Student();
student7.name = "卡牌";
Student student8 = new Student();
student8.name = "安妮";
Student student9 = new Student();
student9.name = "卡特";
Student student10 = new Student();
student10.name = "小炮";
Student student11 = new Student();
student11.name = "女警";
Student student12 = new Student();
student12.name = "薇恩";
Group group1 = new Group();
group1.name ="输出组";
group1.students = new Student[] { student1, student2,student3 };
Group group2 = new Group();
group2.name = "辅助组";
group2.students = new Student[] { student4, student5,student6 };
Group group3 = new Group();
group3.name = "中单组";
group3.students = new Student[] { student7, student8,student9 };
Group group4 = new Group();
group4.name = "ADC组";
group4.students = new Student[] { student10, student11,student12 };
Class myClass = new Class();
myClass.name = "LOL";
myClass.groups = new Group[] { group1, group2, group3, group4 };
return myClass;
}
public static void main(String[] args) {
Class myClass = new Main().initData();
// myClass.queryTeamAndStudentInfo();
// Group group = myClass.teams[0];
// group.queryStudentInfo();
myClass.queryStudentInfo("薇恩");
}
}