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I have a short story with a couple of sentences and I have to transfer that to a string array.
Please refer to this article:
http://www.mkyong.com/java/how-to-read-file-from-java-bufferedreader-example/
specifically:
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();
}
Related
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Closed 7 years ago.
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I have some trouble reading a file. I have my input.txt in contents package, but the program still can't open the file.
String line = null;
try{
//loen faili
FileReader fileReader = new FileReader("contents/input.txt");
BufferedReader buffReader = new BufferedReader(fileReader);
while((line = buffReader.readLine()) != null){
System.out.println(line);
}
buffReader.close();
}catch(FileNotFoundException ex){
System.out.println("Error opening file");
}catch(IOException ex){
System.out.println("Error reading file");
}
Because you need to differnetly open files from your app packages than the one from disk, try:
InputStream is = getClass().getClassLoader().getResourceAsStream("contents/input.txt");
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Closed 8 years ago.
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I want that , by pasting the URL of a file (the file can be an image, an Xhtml, or a Css) into a form of a JSP, this can be downloaded form internet and saved locally. Please can you help me ?
you can use this to open URL in the browser and save into the file location.
<%
String site= contain the string(URL);
response.setStatus(response.SC_MOVED_TEMPORARILY);
response.setHeader("Location", site);
File file = new File("/Users/asdf.xml");
FileWriter fr = null;
BufferedWriter br = null;
URL url = new URL(site);
BufferedReader reader = new BufferedReader
(new InputStreamReader(url.openStream()));
fr = new FileWriter(file);
br = new BufferedWriter(fr);
String line;
while ((line = reader.readLine()) != null) {
System.out.println(line);
br.write(line);
br.newLine();
}
reader.close();
br.close();
%>
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I am experiencing very strange behavior with BufferedReader. I want to read an entire file however it only reads every other line.
E.g the file below
1 //ignore the left most space - shouldn't exist
2
3
4
5
6
Will output
2
4
6
Here is some of my code...
fileRead = new BufferedReader(new InputStreamReader( new FileInputStream(file)));
public void scan(){
if (fileRead != null){
try{
while ((fileRead.readLine()) != null){
String line = fileRead.readLine();
String abcLine = line;
System.out.println(line);
}
}catch(IOException e) {
System.out.println("Line can not be read");
}
}else{ System.out.println("Can not Read - File Not Found"); }
}
My best bet is the bug lies within the while statement. Is this the correct way to ensure
you read the file until you reach EOF "end of file" ?
Any insight is truly appreciated
Thank you!
You're reading two lines each time through the loop. Your current code is:
while ((fileRead.readLine()) != null){ // reads a line, ignores it
String line = fileRead.readLine(); // reads another line, stores in 'line'
... // do stuff with 'line'
}
Every call to readLine() reads a line. You probably want something more like:
String line;
while ((line = fileRead.readLine()) != null) {
... // do stuff with 'line'
}
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i want Some Code for eclipse to open file from internal storage, from Root directory and from system location.
can anyone help me?
thanks
The below lines may be what you wanted.
public static String readFromFile(String filePath){
String total="";
File file=new File(filePath);
try {
String encoding="GBK";
if(file.isFile() && file.exists()){ //判断文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file),encoding);//考虑到汉子编码格式
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while((lineTxt = bufferedReader.readLine()) != null){
total+=lineTxt;
}
read.close();
}else if(!file.exists())
{
file.createNewFile();
}
} catch (Exception e) {
System.out.println("读取文件内容出错");
e.printStackTrace();
}
return total;
}
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Hi i was having issues completetly understanding this feature of my notepad. I want the user ot search for any .txt file they desire in their directory and be able to open it. Remember this is a notepad so the file must be readeable and writable. I created the simple Open but i get stuck in the fact that i keep getting red in br = new BufferedReader(new FileReader(open));, Only on the new FileReader(open)); part. How can i fix this? Any help is appreciated.
public void actionPerformed (ActionEvent event) {
if(event.getSource() == this.newFile){
this.textarea.setText("");
}else if(event.getSource() == this.openFile){
JFileChooser open = new JFileChooser();
int option = open.showOpenDialog(this);
FileReader fr;
BufferedReader br;
if(option == JFileChooser.APPROVE_OPTION){
try{
br = new BufferedReader(new FileReader(open));
//while(){
//}
}catch(Exception ex){
System.out.println("");
}
}
}
}
JFileChooser is not a File, it can not be used as a parameter to FileReader, instead, you need to get the selected File from the chooser...
File choosenOne = open.getSelectedFile();
br = new BufferedReader(new FileReader(choosenOne ));
There are options available to you to make your life a little easier, like filters.
Check out How to use File Choosers for more details