[英]How to read a txt file as my system.in using eclipse
我正在解決代碼廚師的問題。 我遇到了一個問題,所有問題都在於我的答案有誤。 我想測試我的程序以查看其輸出,但是它從文本文件讀取輸入,但是我不知道如何使用Eclipse來執行此操作,我的代碼如下:
import java.io.*;
class Holes {
public static void main(String[] args) throws IOException{
// TODO Auto-generated method stub
BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
int testCases = Integer.parseInt(r.readLine());
for (int i =0; i<testCases; i++)
{
int holes = 0;
String s = r.readLine();
for (int j= 0; j< s.length(); j++)
{
char c = s.charAt(j);
if (c == 'B')
holes += 2;
else if (c== 'A' || c== 'D' ||c== 'O' ||c== 'P' ||c== 'Q' ||c== 'R' )
{
holes +=1;
}
System.out.println(holes);
}
}
}
}
將文件夾添加到您的Eclipse項目中,在該文件夾中添加輸入文件,然后使用BufferReader讀取它,如下所示:BufferedReader br = null;
try {
String sCurrentLine;
br = new BufferedReader(new FileReader("yourFolder/theinputfile.txt"));
while ((sCurrentLine = br.readLine()) != null) {
System.out.println(sCurrentLine);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)br.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
這是另一種方法,是將路徑作為參數傳遞給程序,如下所示
try {
String sCurrentLine;
br = new BufferedReader(new FileReader(args[0]));
while ((sCurrentLine = br.readLine()) != null) {
System.out.println(sCurrentLine);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)br.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
如何在運行應用程序時執行配置並在那里找到args,您可以在其中添加任何路徑,例如c:\\ myinput.txt,希望有幫助
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
public class BufferedReaderExample {
public static void main(String[] args) {
BufferedReader br = null;
try {
String sCurrentLine;
br = new BufferedReader(new FileReader("C:\\testing.txt"));
while ((sCurrentLine = br.readLine()) != null) {
System.out.println(sCurrentLine);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)br.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
}
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