我正在创建一个交互式字典，它将从枚举类中获取外部数据源。我能够使用HashMap和pairs操作成功创建字典，以将语音类型与其定义结合起来。但是，如果输入了第二个输入，则程序应缩小搜索范围。例如，“ Distinct Noun”应仅输出distinct的名词。但是，这仅输出Distinct和Noun的值。我尝试为第二个输入创建第二个扫描仪，但是当我这样做时，第一个输入没有响应。 有人知道为什么会这样吗？有人可以指出我正确的方向吗？ 我已经尝试过scan.hasNextLine（）和scan.next（），但是我不确定是否正确实现了它们以缩小搜索范围。
我提供了我所获得的输出以及所需输出的示例输出。如果需要，我可以提供我的代码，但是如果你们能指出我正确的方向，我将不胜感激，因为我想自己弄清楚这一点。 任何信息都会有所帮助。
如果我不正确地问了这个问题，请告诉我。这是我的第一篇文章，我听说过关于张贴错误问题或要求家庭作业帮助的故事。但是我认为寻求指导是可以的，对吧？
感谢您的时间，
我的输出：
Search: distinct noun
|
Distinct [adjective] : Familiar. Worked in Java.
Distinct [adjective] : Unique, No duplicates.
Distinct [adverb] : Unique. Written "distinctly".
Distinct [noun] : A keyword in this assignment.
Distinct [noun] : A keyword in this assignment.
Distinct [noun] : A keyword in this assignment.
Distinct [noun] : An advanced search option.
Distinct [noun] : Distinct is a parameter in this assignment.
|
Search:
|
Noun [noun] : Noun is a word that refers to a person, place, or thing.
|
所需的输出：
Search: distinct noun
|
Distinct [noun] : A keyword in this assignment.
Distinct [noun] : A keyword in this assignment.
Distinct [noun] : A keyword in this assignment.
Distinct [noun] : An advanced search option.
Distinct [noun] : Distinct is a parameter in this assignment.
|
这是我的代码：
public class DictionaryCSC340{
public static void main(String[] args){
Scanner scan = new Scanner(System.in);
ArrayList keyWords = new ArrayList();
Map<String, List<dictionaryDataBase>> hmap = new HashMap<>();
//Begin loading data
System.out.println("! Loading data...");
//Loop through data in dictionary
for (dictionaryDataBase entry : dictionaryDataBase.values()) { // Enhanced for-loop to get values from enum.
ArrayList pairs = new ArrayList(); //ArrayList to store data speech and definition.
String[] speech, definition; // Strings to store type and desc from enum
keyWords.add(entry.name()); // Add all "Key names" to ArrayList
speech = entry.getSpeech(); //string of speeches
definition = entry.getDefinition(); //string of definitions
//loop through speeches and pair it with its associated definitions.
for (int i = 0; i < speech.length; i++) {
Pair<String, String> pair = new Pair<>(speech[i], definition[i]); // Pair speech and definition
pairs.add(pair); // Add pair with speech and definition to Arraylist "Pairs"
}
hmap.put(entry.name().toLowerCase(), pairs); //Store entry names as the key value and speech and definitions as values.
}
System.out.println("! Loading completed...");
System.out.println("-----DICTIONARY 340 JAVA-----");
//Interface properties
ArrayList dataKey;
Pair inputPair;
String input;
//program begins search.
do{
System.out.print("Search: ");
input = scan.next().toLowerCase();
String entryName = new String();
//Loop through keywords to find a match with the input (ignore cases)
for(int i = 0; i < keyWords.size(); i++){
if(((String) keyWords.get(i)).equalsIgnoreCase(input)){
entryName = (String) keyWords.get(i);
}
}
dataKey = (ArrayList) hmap.get(input);
//if input matches with a value within HashMap, print its value.
if(dataKey != null){
System.out.println(" |");
for(int i = 0; i < dataKey.size(); i++){
inputPair =(Pair) dataKey.get(i);
System.out.print(" " + entryName + " [" + inputPair.getKey() + "] : " );
System.out.println(inputPair.getValue());
}
System.out.println(" |");
}
else if(input.equalsIgnoreCase("!Q")){ //exit operation when !Q is entered.
System.out.println("-----THANK YOU-----");
System.exit(0);
}
//for words that are not within the database.
else{
System.out.println(" |");
System.out.println(" <Not Found>");
System.out.println(" |");
}
}
while(true);
}
}