构建标准JavaBean快捷方式

快捷键：alt+insert(+Fn)->构造函数->全选构造带参方法，不选择则空参构造

插件：ptg,安装后右键单击，倒数第三个则为一键构造所有set/get函数

数据类型

基本数据类型：数据值存储在自己的空间中

特点：赋值给其他变量也是赋的真实的值

引用数据类型：数据存储在其他空间中，自己空间中存储的是地址值

特点：赋值给其他变量赋的是地址值

如：

Student s=new Student();//s为引用数据，其存储的是一个结构体的地址s.name="李明";//结构体内name为基本数据类型，其值存储在自己空间中

小练习-简单版文字游戏

public class Game {public  static  void  main(String[] args){People p1=new People("小兵1号",100);People p2=new People("小兵2号",100);while(p1.getBlood()>0&&p2.getBlood()>0){p1.attack(p2);p2.attack(p1);}}
}

import java.util.Random;
public class People {private String name;private  int blood;public People() {}public People(String name, int blood) {this.name = name;this.blood = blood;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getBlood() {return blood;}public void setBlood(int blood) {this.blood = blood;}public String toString() {return "People{name = " + name + ", blood = " + blood + "}";}public  void attack(People role){Random r=new Random();int damage=r.nextInt(25)+1;int blood2=role.getBlood()-damage;role.setBlood(blood2);System.out.printf("%s攻击了%s，造成了%d点伤害。\n",this.getName(),role.getName(),damage);if (role.getBlood()<=0) System.out.printf("%s死亡，游戏结束,%s胜利！\n",role.getName(),this.getName());else {System.out.printf("%s剩余血量为%d\n", role.getName(), role.getBlood());}}
}

对象数组

和c/c++的结构体数组差不多

public class Good {private String name;private String kind;//种类private int price;//价格private int amount;//数量public Good() {}public Good(String name, String kind, int price, int amount) {this.name = name;this.kind = kind;this.price = price;this.amount = amount;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getKind() {return kind;}public void setKind(String kind) {this.kind = kind;}public int getPrice() {return price;}public void setPrice(int price) {this.price = price;}public int getAmount() {return amount;}public void setAmount(int amount) {this.amount = amount;}public String toString() {return "Good{name = " + name + ", kind = " + kind + ", price = " + price + ", amount = " + amount + "}";}
}

public class Main {public static void main(String[] args) {Good[] arr=new Good[3];Good g1=new Good("巧克力","食品",15,50);Good g2=new Good("笔记本","文具",8,90);Good g3=new Good("短裙","衣物",79,20);arr[0]=g1;arr[1]=g2;arr[2]=g3;for (int i=0;i<3;i++) System.out.println(arr[i].getPrice());}
}

其余对象数组的查找、删除、插入操作与c/c++类似