我不太确定在标题中陈述问题的更好/更清晰的方式,所以请原谅我。
我目前正在尝试做的是根据用户的输入更改变量的值。目前我可以根据输入设置一个值,但是我的程序需要一个循环,用户必须在其中多次输入。
我遇到的问题是,当我调用该类时,它只返回第一个输入的相关数据。因此,虽然用户可以继续进行不同的输入,但数据永远不会在第一次输入之后更新。
import java.util.Scanner;
public class Hw6Wargolet {
public static void main(String[] args) {
Scanner keyboard = new Scanner (System.in);
String buddyName;
String userChoice;
System.out.print("Nurse: The Patient's first name is ");
buddyName = keyboard.nextLine();
System.out.print("You: Let's see, I should (C)hange " + buddyName + "'s bandages," +
"(G)ive " + buddyName + " pain medication, " +
"(A)dd antibiotics to " + buddyName + "'s I.V," +
" or (D)ischarge " + buddyName + " ");
userChoice = keyboard.nextLine();
Buddy score = new Buddy(userChoice);
BuddyScore finalScore = new BuddyScore();
//the loop. essentially repeating the prompt for input until a score is reached
do{
System.out.print("You: Let's see, I should (C)hange " + buddyName + "'s"
+ " bandages, (G)ive " + buddyName + " pain medication, " +
"(A)dd antibiotics to " + buddyName + "'s I.V," +
" or (D)ischarge " + buddyName + " ");
userChoice = keyboard.nextLine();
System.out.println(score.getBuddyScore());
System.out.println(finalScore.getFinalScore());
}while(finalScore.getFinalScore() < 5);
}
}
下面是我的类,它返回数据/值。
public class Buddy {
private String userChoice;
public int buddyScore;
public Buddy(String userChoice){
this.userChoice = userChoice;
}
public void setUserChoice(String userChoice){
this.userChoice = userChoice;
}
public String getUserChoice(){
return userChoice;
}
public void setBuddyScore(int buddyScore){
buddyScore = buddyScore;
}
public int getBuddyScore(){
switch (userChoice){
case "C":
buddyScore = 1;
break;
case "G":
buddyScore = -2;
break;
case "A":
buddyScore = 3;
break;
case "D":
buddyScore = 7;
break;
default:
buddyScore = 0;
break;
};
return buddyScore;
}
}
此外,下面是获取每个输入分数并加/减总分的类
public class BuddyScore {
public int finalScore;
private int buddyScore;
public BuddyScore(){
this.finalScore = finalScore;
this.buddyScore = buddyScore;
}
public BuddyScore(Buddy object2){
buddyScore = object2.getBuddyScore();
}
public void setFinalScore(int finalScore){
this.finalScore = finalScore;
}
public int getFinalScore(){
return finalScore += buddyScore;
}
}
任何意见、提示、建议将不胜感激。谢谢。
最佳答案
我注意到三件事:
1)
在你的 Buddy
类中,在方法 setBuddyScore(int buddyScore)
中你做
buddyscore = buddyscore;
代替
this.buddyscore = buddyscore;
(可能导致成员变量和参数的混淆)
2)(编辑)
在您的主类中,新的 userChoice
没有任何变化。也许你可以这样做:
首先更改 BuddyScore
类,使其存储整个 Buddy
对象,而不仅仅是分数。这样,BuddyScore
对象就可以知道 Buddy
对象发生了哪些变化。然后您需要在 getFinalScore()
中调用 getBuddyScore()
方法以始终添加当前分数。
public class BuddyScore {
private Buddy buddyScore;
public BuddyScore(Buddy buddyScore) {
this.buddyScore = buddyScore; // here you store the 'reference' of your Buddy object
}
public int getFinalScore() {
return finalScore += buddyScore.getBuddyScore(); // here you retrieve the most recent 'buddyScore' from your 'Buddy' object and add it to the finalScore
}
}
然后回到你的主类,你所需要的就是更新 Buddy
对象(在循环内)以始终知道最新的 userChoice:
do {
// stuff
userChoice = keyboard.nextLine();
score.setUserChoice(userChoice);
}while (finalScore.getFinalScore() < 5); // here your finalScore object will add the recent score from the buddy class to the final score
这确实有效。但请注意,您的最终分数只会在您调用 getFinalScore()
时更新......也许您应该引入另一种方法来进行更新并让 getFinalScore()
仅返回已经计算出的最终分数。
关于Java-根据用户输入更新类的返回数据,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22998733/