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Trouble opening text file [closed]

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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");

Java, automatic reading file from a directory [closed]

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I need to know if it's possible to do this:
i've some .txt file in a directory in my filesystem
i would like to write a java code that does this:
Automatically read all the files in the directory
Give me a output
Exists some library? or it's just a code problem?
It's possible?
Thanks

Reads & prints the content
public static void main(String[] args) {
List<String> li=new TestClass().textFiles("your Directory");
for(String s:li){
try(BufferedReader br = new BufferedReader(new FileReader(s))) {
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null) {
sb.append(line);
sb.append(System.lineSeparator());
line = br.readLine();
}
String everything = sb.toString();
System.out.println(everything);
} catch (IOException e) {
e.printStackTrace();
}
}
}
For getting all Text files in the Directory
List<String> textFiles(String directory) {
List<String> textFiles = new ArrayList<String>();
File dir = new File(directory);
for (File file : dir.listFiles()) {
if (file.getName().endsWith((".txt"))) {
textFiles.add(file.getPath());
}
}
return textFiles;
}

Of course it's possible. You need to look at File, Reader classes. A useful method is File#listFiles. Happy coding.

How to get the page source from specific link in Java? [closed]

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Is it possible to get the inputStream of particular website content or it's page source into String?
For instance, I want to download the whole html tag from particular website into string or xml. Is it possible?

Yes of course you just have to do something like
public static void main(String[] args) {
URL url;
try {
// get URL content
url = new URL("http://www.mkyong.com");
URLConnection conn = url.openConnection();
// open the stream and put it into BufferedReader
BufferedReader br = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String inputLine;
//save to this filename
String fileName = "/users/mkyong/test.html";
File file = new File(fileName);
if (!file.exists()) {
file.createNewFile();
}
//use FileWriter to write file
FileWriter fw = new FileWriter(file.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
while ((inputLine = br.readLine()) != null) {
bw.write(inputLine);
}
bw.close();
br.close();
System.out.println("Done");
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
CREDIT : mkyong

You may want to look at guava's CharStreams class.
CharStreams.toString(new InputStreamReader(..))
will save you from writing much boilerplate code.
Here is doc

How to put a text file into a string array? [closed]

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Closed 9 years ago.
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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();
}

Creating an Open Function in Java using JFIleChooser [closed]

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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