Java 面与对象

类和对象
·类：是一组相关属性和行为的集合。可以看成是一事物的模板，使用事物的属性特征和行为特征来描述该类事物
现实中，描述一类事物：
*·属性：*就是该事物的状态信息。
*·行为：*就是该事物能够做什么。

举例：小猫
属性：名字、体重、年龄、颜色
行为：走、跑、叫

作业
1.更改管理信息
package x303_20101106;
import java.util.Scanner;
public class num3 {
public static void main(String[] args) {
num3_3 manage=new num3_3();
num3_3 manage2=new num3_3();
System.out.println(“管理员1”);
manage.name=“aaa”;
manage.password=“111111”;
manage.name();
manage.password();
System.out.println("");
System.out.println(“管理员2”);
manage2.name2=“bbb”;
manage2.password2=“222222”;
manage2.name2();
manage2.password2();
System.out.println("");

Scanner scanner = new Scanner(System.in);		
	System.out.print("姓名：");
	String num1=scanner.next();
	System.out.print("密码：");
	String num11=scanner.next();		

	if(manage.name.equals(num1) && manage.password.equals(num11)){
	System.out.print("请输入新密码：");
	int novel=scanner.nextInt();
	System.out.print("修改密码成功，您的新密码是"+novel);
	}
	else if(manage2.name2.equals(num1)&&manage2.password2.equals(num11)){
	System.out.print("请输入新密码：");
	int novel2=scanner.nextInt();
	System.out.print("修改密码成功，您的新密码是"+novel2);
}else{
	System.out.print("您的用户名和密码不匹配，不具有权限更改管理员信息");
}	

}
}

2.会员积分回馈
package x303_20101106;
import java.util.Scanner;
public class num4 {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
num4_4 shopping = new num4_4();
num4_4 shopping2 = new num4_4();
shopping.SVIP = “金卡会员”;
shopping.SVIP();
shopping2.VIP = “普通会员”;
shopping2.VIP();
System.out.println("");

	String a="y";
	while(a.equals("y")){
	System.out.print("请输入客户卡型：");
	String block = scanner.next();
	System.out.print("积分：");
	int integral = scanner.nextInt();
	int num=0;
	int num2=0;
	
	if (integral > 1000 && shopping.SVIP.equals(block)) {
		System.out.println("获得回馈积分500分");
		num=integral+500;
		System.out.println("总积分："+num);
	}else if(integral>5000&&shopping2.VIP.equals(block)){
		System.out.println("获得回馈积分500分");
		num2=integral+500;
		System.out.println("总积分："+num2);
}else{
	System.out.println("未达到获得回馈积分条件");
}	
	System.out.println("");
	System.out.print("\n是否继续(y/n):");
	a=scanner.next();
	}
	System.out.println("程序结束");

}
}