I am trying to read a file containing greek words in utf8
with the following code
reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF8"));
while((line = reader.readLine()) != null){
tokenizer = new StringTokenizer(line, delimiter);
while(tokenizer.hasMoreTokens()){
currentToken = tokenizer.nextToken();
map.put(currentToken, 1);
}
}
On every forum I looked for, I saw this new FileInputStream(file), "UTF8")
but still the printed results is like that ����
p.s. when i print a variable containing a greek word from inside the code, the print is successfull, that means that the problem is on file read.
any ideas?
There are some with too professionalism here. I remind you again that we are humans, not compilers! I am here again "powers" you deleted by post! I am very proud of being born in the birthplace of democracy, respecting the other discussants! You don't respect anything "guru" guys...
PS: Yeah, I know that you disseminate again down votes, but who really cares?
There is no "UTF8" charset in Java. The correct charset name is "UTF-8":
new InputStreamReader(new FileInputStream(file), "UTF-8"))
Or use StandardCharsets.UTF_8 instead to avoid any ambiguity:
new InputStreamReader(new FileInputStream(file), StandardCharsets.UTF_8))
That being said, make sure the file is actually UTF-8 encoded. If it has a UTF-8 BOM in front, you will have to either strip it off from the file itself, or manually skip it when reading the file before then reading the lines. Java readers do not recognize or skip BOMs automatically.
Use this for proper converstion - this one is from iso-8859-1 to utf-8:
public String to_utf8(String fieldvalue) throws UnsupportedEncodingException{
String fieldvalue_utf8 = new String(fieldvalue.getBytes("ISO-8859-1"), "UTF-8");
return fieldvalue_utf8;
}
Related
I'm importing a file into my code and trying to print it. the file contains
i don't like cake.
pizza is good.
i don’t like "cookies" to.
17.
29.
the second dont has a "right single quotation" and when I print it the output is
don�t
the question mark is printed out a blank square. is there a way to convert it to a regular apostrophe?
EDIT:
public class Somethingsomething {
public static void main(String[] args) throws FileNotFoundException,
IOException {
ArrayList<String> list = new ArrayList<String>();
File file = new File("D:\\project1Test.txt");//D:\\project1Test.txt
if(file.exists()){//checks if file exist
FileInputStream fileStream = new FileInputStream(file);
InputStreamReader input = new InputStreamReader(fileStream);
BufferedReader reader = new BufferedReader(input);
String line;
while( (line = reader.readLine()) != null) {
list.add(line);
}
for(int i = 0; i < list.size(); i ++){
System.out.println(list.get(i));
}
}
}}
it should print as normal but the second "don't" has a white block on the apostrophe
this is the file I'm using https://www.mediafire.com/file/8rk7nwilpj7rn7s/project1Test.txt
edit: if it helps even more my the full document where the character is found here
https://www.nytimes.com/2018/03/25/business/economy/labor-professionals.html
It’s all about character encoding. The way characters are represented isn't always the same and they tend to get misinterpreted.
Characters are usually stored as numbers that depend on the encoding standard (and there are so many of them). For example in ASCII, "a" is 97, and in UTF-8 it's 61.
Now when you see funny characters such as the question mark (called replacement character) in this case, it's usually that an encoding standard is being misinterpreted as another standard, and the replacement character is used to replace the unknown or misinterpreted character.
To fix your problem you need to tell your reader to read your file using a specific character encoding, say SOME-CHARSET.
Replace this:
InputStreamReader input = new InputStreamReader(fileStream);
with this:
InputStreamReader input = new InputStreamReader(fileStream, "SOME-CHARSET");
A list of charsets is available here. Unfortunately, you might want to go through them one by one. A short list of most common ones could be found here.
Your problem is almost certainly the encoding scheme you are using. You can read a file in most any encoding scheme you want. Just tell Java how your input was encoded. UTF-8 is common on Linux. Windows native is CP-1250.
This is the sort of problem you have all the time if you are processing files created on a different OS.
See here and Here
I'll give you a different approach...
Use the appropriate means for reading plain text files. Try this:
public static String getTxtContent(String path)
{
try(BufferedReader br = new BufferedReader(new FileReader(path)))
{
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null) {
sb.append(line);
sb.append(System.lineSeparator());
line = br.readLine();
}
return sb.toString();
}catch(IOException fex){ return null; }
}
I have a txt file with three rows of integers, after adding them to a List I'm finding a strange char at the beginning of the first index. I used an InputStream, BufferedReader and StringBuilder to read from the file. I tried to debug using println() statements at several places but I still can't figure out where that char came from.
File selectedFile = fileChooser.getSelectedFile();
inputStream = new FileInputStream(selectedFile);
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder out = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
out.append(line);
items.add(line);
}
When I try to copy the output from printing out List items to this post somehow the char I'm talking about does not show, so I'll post a screenshot instead:
http://imgur.com/gjaF3no
http://imgur.com/JHAH6mV
The first is of the entire list, and the second should show the char I'm talking more clearly, it looks like a dot before "3". Any help would be appreciated, Thank you.
You can try removing all control characters (strange characters) by doing the following:
strangeString.replaceAll("\\p{Cntrl}", "");
Reference: Java - removing strange characters from a String
Thank you all for the help. The problem was actually in the original txt file like #coder
My snippet code are as follow:
FileOutputStream fos = new FileOutputStream("newFile.txt");
OutputStreamWriter out = new OutputStreamWriter(fos, "UTF-8");
Writer w = out;
for(String str : arrayName)
{
w.write("sample");
//I wish to insert new line here
}
w.close();
Is there other way than to write a blank space manually? i.e. w.write("\n");
EDITED. Sorry for causing some misunderstanding regarding if I am looking for new line or blank space.
For platform independent way use this:
w.write(System.getProperty("line.separator"));
w.write("\n");
Well apparently this answer was to short.
Read Java documentation about special characters
For blank space (space character) just do:
w.write(" ");
try this
PrintWriter bw = new PrintWriter(new File("newFile.txt"), "UTF-8");
...
bw.println("sample");
I am reading a csv file in java, adding a new column with new information and exporting it back to a CSV file. I have a problem in reading the CSV file in UTF-8 format. I read line by line and store it in a StringBuilder, but when I print the line I can see that the information I'm reading is not in UTF-8 but in ANSI. I used both System.out.print and printstream in UTF and the information appears still in ANSI. This is my code :
BufferedReader br;
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(
"./users.csv"), "UTF8"));
String line;
while ((line = br.readLine()) != null) {
if (line.contains("none#none.com")) {
continue;
}
if (!line.contains("#") && !line.contains("FirstName")) {
continue;
}
PrintStream ps = new PrintStream(System.out, true, "UTF-8");
ps.print(line + "\n");
sbusers.append(line);
sbusers.append("\n");
sbusers2.append(line);
sbusers2.append(",");
}
br.close();
} catch (IOException e) {
System.out.println("Failed to read users file.");
} finally {
}
It prints out information like "Professor -P�s". Since the reading isn't being done correctly the output to the new file is also being exported in ANSI.
Are you sure your CSV is UTF-8 encoded? My guess is that it's not. Try using ISO-8859-1 for reading the file, but keep the output as UTF-8. (UTF8 and UTF-8 both tend to work, but you should use UTF-8 as #Marcelo suggested)
In the line:
br = new BufferedReader(new InputStreamReader(new FileInputStream("./users.csv"),"UTF8"));
Your charset should be "UTF-8" not "UTF8".
Printing to System.out using UTF encoding ????????????
Why would you do that ? System.out and the encoding it uses is determined at the OS level (it becomes the default charset in the JVM), and that's the only one you want to use on System.out.
Fist, as suggested by #Marcelo, use UTF8 instead of UTF-8:
BufferedReader in = new BufferedReader(
new InputStreamReader(
new FileInputStream("./users.csv"), "UTF8"));
Second, forget about the PrintStream, just use System.out, or better yet, a logging API. You don't need to worry about how Java will output your string to the console (number one rule about character encoding: After you've read things successfully, let Java handle the encoding and only worry about it again when you are writing to an external file / database / etc).
Third and more important, check that your file is really encoded in UTF-8, this is the cause of 99% of the encoding problems.
Make sure that you test with a real UTF-8 file (use tools like iconv to convert to UTF-8 and be sure about it).
found a potential solution(I had the same problem). Depending on the type of UTF-8 encoding you need to specify if further...
Replace:
br = new BufferedReader(new InputStreamReader(new FileInputStream(
"./users.csv"), "UTF8"));
With:
br = new BufferedReader(new InputStreamReader(new FileInputStream(
"./users.csv"), "ISO_8859_1"));
For further understanding: https://mincong.io/2019/04/07/understanding-iso-8859-1-and-utf-8/
when i try to get the text from a document, if it is followed by some special characters such as TM or C (for copyright) and so on, after writing it into a text file it will makes some unexpected added to it. as an example, we can consider the following:
if we have Apache™ Hadoop™! and then if we try to write in into a text using FileOutputStream then result would be like Apacheâ Hadoopâ which the â is nonsense for me and generally i want a way to detect such characters in the text and just skipping them for writing them, is there solution to this?
If you want just the printable ASCII range, then iterate over your string character by character building a new string. Include the character only if it's within the range 0x20 to 0x7E.
final StringBuilder buff = new StringBuilder();
for (char c : string.toCharArray())
{
if (c >= 0x20 && c <= 0x7E)
{
buff.append(c);
}
}
final FileWriter w = new FileWriter(...);
w.write(buff.toString());
w.close();
If you want to keep carriage returns and newlines, you also need to consider 0x0A and 0x0D.
I mis-read the question originally and didn't notice you wanted to skip them. I'll leave this here for now and will delete it if someone posts something better.
To deal with the characters properly, you can explicit setg the charset to ISO-8859-1. To do this, you'll need to use something like an OutputStreamWriter.
final OutputStreamWriter writer;
writer = new OutputStreamWriter(new FileOutputStream(file),
Charset.forName("ISO-8859-1"));
writer.write(string);
writer.close();
This won't skip them, but should encode them properly.
The reason is characters coding problem. Before you write the string into file, you need to coding the String characters.
you can use like follow:
Writer out = new OutputStreamWriter(new FileOutputStream(
new File("D://helloWorld.txt")), "UTF8");
String tm ="Apache™ Hadoop™";
out.write(tm);
out.close();