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teajava代码 attention is all you need代码
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java下面打*号的地方代码显示 tea cannot be resolved to a variable是什么原因
public class pro {
public static void main(String[] args) {
Teacher tea = new Teacher();
startInTeacher(tea );
System.out.println(tea.getName2()+"\n"+tea.getTeachClass()+"\n"+tea.getSex());
}
public static void startInTeacher(tea ) {
java.util.Scanner s = new java.util.Scanner(System.in);
System.out.print("please turn in:\nname:");
String name2 = s.next();
System.out.print("\nclass:");
String teachClass = s.next();
System.out.print("\nsex:");
String sex = s.next() ;
** tea.setName2 = name2;
** tea.setTeachClass = teachClass;
** tea.setSex = sex;
}
你没有定义tea，所以报错，你把它传进方法里，也行
相关问答
Q1: java中的set和get只会用不知道什么意思麻烦解释下？
set/get方法是通过对数据teajava代码的方法封装teajava代码，实现对域的保护；怎么定义要看teajava代码你具体需求；
set/get方法可以自动生成，不需要手动敲代码的。
public class Water{
private String tea;
private String milk;
public String getTea() {
return tea;
}
public void setTea(String tea) {
this.tea = tea;
}
public String getMilk() {
return milk;
}
public void setMilk(String milk) {
this.milk = milk;
}
}
Q2: 使用java 定义抽象类：public abstract class Person
代码如下。为了显示方便所以写在同一个文件里面了。
public class Test {
public static void main(String... args) throws Exception {
Person stu1 = new Student();
stu1.preWork();
stu1.work();
stu1.reWork();
stu1.doHomework();
Person tea1 = new Teacher();
tea1.preWork();
tea1.work();
tea1.reWork();
tea1.doHomework();
}
}
abstract class Person {
public abstract void preWork();
public abstract void work();
public abstract void reWork();
public abstract void doHomework();
}
class Student extends Person {
public void preWork() {
System.out.println("预习");
}
public void work() {
System.out.println("上课");
}
public void reWork() {
System.out.println("复习");
}
public void doHomework() {
System.out.println("写作业");
}
}
class Teacher extends Person {
public void preWork() {
System.out.println("备课");
}
public void work() {
System.out.println("上课");
}
public void reWork() {
System.out.println("辅导");
}
public void doHomework() {
System.out.println("批作业");
}
}
Q3: 求一个简易自动售货机的代码（java）要用创建类封装性，输出的时候要有提示语句，代码类似以下图片
//Example类文件Example.java
package cn.zhouhan;
import java.util.Scanner;
public class Example {
static Drink cola, fanta, blacktea, greentea;
static int money;
public static void main(String[] args) {
// TODO Auto-generated method stub
cola = new Drink("可乐", 50, 2.0, 1);
fanta = new Drink("芬达", 40, 3.0, 2);
blacktea = new Drink("红茶", 30, 4.0, 3);
greentea = new Drink("绿茶", 20, 5.0, 4);
money = 500;
for(;;)
{
System.out.println("-------------自动售货机-------------");
cola.UserPrintDrinkInfo();
fanta.UserPrintDrinkInfo();
blacktea.UserPrintDrinkInfo();
greentea.UserPrintDrinkInfo();
System.out.println("----------------------------------");
System.out.println("1.购买饮料");
System.out.println("2.管理员查询");
System.out.println("3.返回");
System.out.println("请输入要执行的操作序号：");
Scanner scannerIndex = new Scanner(System.in);
int indexScanner = scannerIndex.nextInt();
switch(indexScanner)
{
case 1:
System.out.println("请选择购买的饮料（1.可乐，2.芬达，3红茶，4.绿茶）：");
Scanner numberScanner = new Scanner(System.in);
int buyIndex = numberScanner.nextInt();
Drink drink = getDrink(buyIndex);
System.out.println("请输入购买的数量：");
Scanner countScanner = new Scanner(System.in);
int buyCount = countScanner.nextInt();
if (buyCount 0)
{
System.out.println("您选择了" + buyCount + "瓶" + drink.getName() + "." );
System.out.println("总价格：" + drink.getPrice() * buyCount + "元，请投入1元或5元纸币。");
System.out.println("确定购买？（1.确定，2.退款）：");
Scanner sureScanner = new Scanner(System.in);
int sure = sureScanner.nextInt();
if (sure == 1)
{
drink.sellDrink(buyCount);
money += drink.getPrice() * buyCount;
System.out.println("您购买了" + buyCount + "瓶" + drink.getName() + "，交易成功." );
}
if (sure ==2 )
{
System.out.println("退款成功！");
}
}
else
System.out.println("输入的数量有误！");
break;
case 2:
System.out.println("请输入管理员密码：");
Scanner pwScanner = new Scanner(System.in);
int password = pwScanner.nextInt();
if (password == 123)
{
System.out.println("密码正确，目前的余额为：" + money + "元。");
}
else
System.out.println("密码错误。");
break;
case 3:
break;
default:
System.out.println("请输入正确的数字。");
break;
}
}
}
public static Drink getDrink(int drinkIndex)
{
Drink drink = null;
switch(drinkIndex)
{
case 1:
drink = cola;
System.out.println("您选择了可乐。");
break;
case 2:
drink = fanta;
System.out.println("您选择了芬达。");
break;
case 3:
drink = blacktea;
System.out.println("您选择了红茶。");
break;
case 4:
drink = greentea;
System.out.println("您选择了绿茶。");
break;
default:
//drink = null;
System.out.println("输入错误，请输入1~4的数字！");
}
return drink;
}
}
//创建的Drink类文件Drink.java
package cn.zhouhan;
public class Drink {
private String name;
private int number;
private double price;
private double drinkMoney;
private int index;
public Drink(String name, int number, double price, int index)
{
this.name = name;
this.number = number;
this.price = price;
this.drinkMoney = number * price;
this.index = index;
}
public String getName()
{
return this.name;
}
public int getNumber()
{
return this.number;
}
public double getPrice()
{
return this.price;
}
public void sellDrink(int count)
{
this.number -= count;
this.drinkMoney += this.price * count;
}
public void UserPrintDrinkInfo()
{
System.out.println("品名："+ this.name +"，单价：" + this.price + "元，剩余数量：" + this.number + "瓶。");
}
}
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