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我在最后 6 个 if 语句中收到错误“局部变量操作可能尚未初始化”。我不知道它想从我这里得到什么。请帮忙！:(我已经尝试过eclipse建议的修复并尝试自己修复它，但没有任何效果......

import java.util.Scanner;
import static java.lang.System.out;

public class test2 {

enum dog {sleeping, eating, peeing, pooping, dead, robot}

public static void main(String args[]) {
    Scanner myScanner = new Scanner(System.in);
    dog action;
    int heartrate;

    out.println("What is the heart rate of your dog? I will be able to tell you what the dog is doing from that information.");
    heartrate = myScanner.nextInt();

    if (heartrate >= 60 || heartrate <= 120) {
        action = dog.sleeping;
    }else if (heartrate == 0) {
        action = dog.dead;
    }else if (heartrate > 500) {
        action = dog.robot;
    }else if (heartrate >= 150 || heartrate <= 200) {
        action = dog.peeing;
    }else if (heartrate >= 150 || heartrate <= 200) {
        action = dog.pooping;
    }else if (heartrate >= 150 || heartrate <= 200) {
        action = dog.eating;
    }
    out.print("Your dog is currently ");
    if (action == dog.sleeping) {
        out.print("sleeping ");
    }
    if (action == dog.dead) {
        out.print("dead ");
    }
    if (action == dog.robot) {
        out.print("a robot.");
    }
    if (action == dog.peeing) {
        out.print("peeing ");
    }
    if (action == dog.pooping) {
        out.print("pooping ");
    }
    if (action == dog.eating) {
        out.print("eating ");
    }
    System.out.println(".");
}
}
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1 回答 1

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在使用它之前，您必须给变量一个值。例如action，并非在所有条件下都已初始化，因此您无法安全地使用它。

一个简单的解决方案是提供一个默认值，例如

dog action = dog.dead;

if(action ==您可以使用一个switch块来代替一系列语句。

顺便说一句，您的三个条件相同，您的 IDE 也应该警告您。

于 2013-10-20T00:30:20.827 回答