我可以解析文件，我可以读出文件的内容，但我无法在文件中搜索特定的单词或计算文件中的单词数：
以下代码：
public class Manager{
private String[] textData;
private String path;
public String loadFile (String file_path){
return path= file_path;
}
public String [] openFile() throws IOException{
FileReader fr = new FileReader(path);
BufferedReader textReader = new BufferedReader (fr);
int numberOfLines = readLines();
textData = new String[numberOfLines];
int i;
for (i=0; i < numberOfLines; i++) {
textData[i] = textReader.readLine();
}
textReader.close( );
return textData;
}
int readLines() throws IOException{
FileReader file_to_read = new FileReader(path);
BufferedReader bf = new BufferedReader (file_to_read);
String aLine;
int numberOfLines = 0;
while ((aLine =bf.readLine()) !=null){
numberOfLines++;
}
bf.close();
return numberOfLines;
}
}
private int findText(String s){
for (int i = 0; i < textData.length; i++){
if (textData[i] != null && textData[i].equals(s)){
return i;
}
}
return -1;
}
public boolean contains(String s){
for(int i=0; i<textData.length; i++){
if(textData[i] !=null && textData[i].equals(s)){
return true;
}
}
return false;
}
public int count(){
int counter = 0;
for (int i = 0; i < textData.length; i++){
if (textData[i] != null) counter++;
}
return counter;
}
}
我的其他班级：
ublic class Runner {
private String fileInput;
private Scanner scanner = new Scanner(System.in);
private boolean keepRunning= true;
private Manager m = new Manager();
public static void main(String[] args) throws Exception {
new Runner();
}
public Runner() throws Exception{
do {
System.out.println("--------------------------------------------------");
System.out.println("\t\t\t\tText Analyser");
System.out.println("--------------------------------------------------");
System.out.println("1)Parse a File");
System.out.println("2)Parse a URL");
System.out.println("3)Exit");
System.out.println("Select option [1-3]>");
String option = scanner.next();
if (option.equals("1")){
parseFile();
}else if(option.equals("2")){
parseUrl();
}else if(option.equals("3")){
keepRunning = false;
}else{
System.out.println("Please enter option 1-3!");
}
} while (keepRunning);
System.out.println("Bye!");
scanner.close();
}
private void parseFile()throws Exception{
String file_name;
System.out.print("What is the full file path name of the file you would like to parse?\n>>"); ////The user might enter in a path name like: "C:/Users/Freddy/Desktop/catDog.txt";
file_name = scanner.next();
try {
Manager file = new Manager();
file.loadFile(file_name);
String[] aryLines = file.openFile( );
int i;
for ( i=0; i < aryLines.length; i++ ) {
System.out.println( aryLines[ i ] ) ;
}
}
catch ( IOException e ) {
System.out.println( e.getMessage() );
}
do {
System.out.println("*** Parse a file or URL ***");
System.out.println("1)Search File");
System.out.println("2)Print Stats about File");
System.out.println("3)Exit");
System.out.println("Select option [1-3]>");
String option = scanner.next();
if (option.equals("1")){
}else if(option.equals("2")){
}else if(option.equals("3")){
keepRunning = false;
}else{
System.out.println("Please enter option 1-3!");
}
} while (keepRunning);
System.out.println("Bye!");
scanner.close();
}
private void parseUrl()throws Exception{
}
private void search() throws Exception{
do {
System.out.println("*** Search ***");
System.out.println("1)Does the file/URL contain a certain word");
System.out.println("2)Count all words in the file/url");
System.out.println("9)Exit");
System.out.println("Select option [1-9]>");
String choice = scanner.next(); //Get the selected item
if (choice.equals("1")){
contains();
}else if(choice.equals("2")){
count();
}else if(choice.equals("3")){
keepRunning = false;
}else{
System.out.println("Please enter option 1-3!");
}
} while (keepRunning);
System.out.println("Bye!");
scanner.close();
}
private void contains(){
System.out.println("*** Check to see if a certain Word/Letter appears in the file/URL ***");
System.out.println("Enter what you would like to search for:");
String s = scanner.next();
boolean sc = m.contains(s);
System.out.println("If its true its in the file, if its false its not in the file/URL");
System.out.println("The answer = " + sc);
}
private void count(){
int totalNumberOfElement = m.count();
System.out.println("Total number of elements in the file/Url is" + totalNumberOfElement );
}
答案 0 :(得分：0)
请考虑以下几点来更改您的代码： 1.使用List（例如：List contents = new List）从文件中读取行 2.使用contents.size（）获取行数。那很简单。 3.您正在使用equals（）方法搜索一行中的文本。使用contains（）或indexOf（）方法。更好，如果你意识到它，请使用正则表达式。
答案 1 :(得分：0)
我认为最简单的方法如下：
public boolean contains(String s){
return textData.toLowerCase().contains(s.toLowerCase())
}
但只有goint才能为字符串工作！
答案 2 :(得分：0)
我在下面写了一些代码。看看它是否对你有所帮助。请不要复制粘贴，尝试学习逻辑。
import java.io.*;
public class Manager
{
String[] textData;
String path;
int numberOfWords;
public void loadFile(String path) throws Exception
{
this.path = path;
StringBuffer buffer = new StringBuffer();
BufferedReader reader = new BufferedReader(new FileReader(path));
String line;
String[] words;
numberOfWords = 0;
while((line=reader.readLine()) != null)
{
buffer.append(line + "\n");
words = line.split(" ");
numberOfWords = numberOfWords + words.length;
}
//deleting the last extra newline character
buffer.deleteCharAt(buffer.lastIndexOf("\n"));
textData = buffer.toString().split("\n");
}
public void printFile()
{
for(int i=0;i<textData.length;i++)
System.out.println(textData[i]);
}
public int findText(String text)
{
for(int i=0;i<textData.length;i++)
if(textData[i].contains(text))
return i;
return -1;
}
public boolean contains(String text)
{
for(int i=0;i<textData.length;i++)
if(textData[i].contains(text))
return true;
return false;
}
public int getNumberOfWords()
{
return numberOfWords;
}
public int getCount()
{
return textData.length;
}
}