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我在更新下面的代碼中的error時遇到問題。我已經包括下面的兩個班級; MadLib類和MadLibRunner類。更新循環中的值
import java.util.Scanner;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
import static java.lang.System.*;
public class MadLib
{
ArrayList<String> nouns;
ArrayList<String> adjectives;
ArrayList<String> verbs;
public MadLib()
{
nouns = new ArrayList<String>();
adjectives = new ArrayList<String>();
verbs = new ArrayList<String>();
nouns.add("dog");
nouns.add("pig");
nouns.add("chicken");
nouns.add("building");
nouns.add("car");
nouns.add("person");
nouns.add("place");
nouns.add("thing");
nouns.add("truck");
nouns.add("city");
nouns.add("state");
nouns.add("school");
nouns.add("student");
nouns.add("bird");
nouns.add("turkey");
nouns.add("lion");
nouns.add("tiger");
nouns.add("alligator");
nouns.add("elephant");
adjectives.add("blue");
adjectives.add("green");
adjectives.add("orange");
adjectives.add("fat");
adjectives.add("skinny");
adjectives.add("tall");
adjectives.add("funny");
adjectives.add("mad");
adjectives.add("glad");
adjectives.add("happy");
adjectives.add("silly");
adjectives.add("purple");
adjectives.add("big");
adjectives.add("little");
adjectives.add("tiny");
adjectives.add("huge");
verbs.add("run");
verbs.add("fly");
verbs.add("skip");
verbs.add("climb");
verbs.add("clean");
verbs.add("smell");
verbs.add("eat");
verbs.add("cry");
verbs.add("smile");
verbs.add("laugh");
verbs.add("jump");
verbs.add("crank");
verbs.add("program");
}
public String sentence (String statement)
{
String output = statement;
String word = "";
Random rand = new Random();
String error = "";
for (int i = 0; i < output.length() - 1; i++)
{
if (nouns.size() > 0 && adjectives.size() > 0 && verbs.size() > 0)
{
if (output.charAt(i) == '#')
{
int random = rand.nextInt(nouns.size());
word = nouns.get(random);
nouns.remove(random);
output = output.substring(0, i) + word + (output.substring(i + 1));
}
else if (output.charAt(i) == '&')
{
int random = rand.nextInt(adjectives.size());
word = adjectives.get(random);
adjectives.remove(random);
output = output.substring(0, i) + word + (output.substring(i + 1));
}
else if (output.charAt(i) == '@')
{
int random = rand.nextInt(verbs.size());
word = verbs.get(random);
verbs.remove(random);
output = output.substring(0, i) + word + (output.substring(i + 1));
}
}
else
{
int nounCount = nouns.size() - 1;
int adjectiveCount = adjectives.size() - 1;
int verbCount = verbs.size() - 1;
if (nounCount == 0)
{
error = error + "Error: Not enough nouns.";
}
else if (adjectiveCount == 0)
{
error = error + "Error: Not enough adjectives.";
}
else if (verbCount == 0)
{
error = error + "Error: Not enough verbs.";
}
else if (nounCount == 0 && adjectiveCount == 0)
{
error = error + "Error: Not enough nouns and adjectives.";
}
else if (nounCount == 0 && verbCount == 0)
{
error = error + "Error: Not enough nouns and verbs.";
}
else if (adjectiveCount == 0 && verbCount == 0)
{
error = error + "Error: Not enough adjectives and verbs.";
}
else if (nounCount == 0 && adjectiveCount == 0 && verbCount == 0)
{
error = error + "Error: Not enough nouns, adjectives, and verbs.";
}
output = "Error: Not enough " + error;
break;
}
}
return output;
}
}
和轉輪類...
public class MadLibRunner
{
public static void main(String args[])
{
boolean quit=false;
MadLib prog = new MadLib();
do
{
out.println("Welcome to MadLibs!\n Please input your coded sentence, or end to exit: ");
Scanner in = new Scanner (System.in);
String statement = in.nextLine();
if(statement.equals("end"))
quit=true;
else
out.println(prog.sentence(statement));
}while(!quit);
out.println("\nThank you, goodbye.\n");
}
}
在循環的else聲明的目的是指定哪些詞類失蹤。我一直得到的問題是error不會在的for循環末尾更新。我試着改變error的初始值來測試輸出，它確實返回了error的測試值。我如何在循環中更新error？
哇，我只是意識到我忘了澄清一些非常重要的東西。我應該能夠在代碼中輸入多個句子，並且每次使用的名詞/形容詞/動詞都從列表中刪除。如果在任何迭代過程中整個句子的任何部分都沒有足夠的語音，那麼它應該顯示一條錯誤消息。錯誤消息是什麼不工作。
如果您想了解每行代碼的作用，我建議您在調試器中逐步執行代碼。如果'error'變量沒有被改變，那麼你的條件都不是'true' –
爲什麼它會進入該代碼塊？你的容器都包含條目（名詞，動詞等） – Nim
如果你添加一個System.out.println（nounCount +「」+ adjectiveCount +「」+ verbCount）;'this line後面'int verbCount =動詞.size（） - 1;'？我很確定它打印'-1'。所以你所有的'if-else'都是假的，因爲它們不等於0. – Frakcool