Need help from you regarding a Scenario, i.e., I have to take a value from DB like "42258258.2300" and convert this into "42,258,258.00" value.
And again need to check whether this value present in downloaded CSV file.
I used below code for read from CSV file but am not getting the output. Kindly help me on this.
String strFile = "outputfile.csv";
FileInputStream fstream = new FileInputStream(strFile);
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
while ((strLine = br.readLine()) != null) {
String ss = "$42,699,561.00";
if(strLine.contains(ss)){
System.out.println ("Success"); }
}
in.close();
What do you get if you print strLine? Are you really getting the string?
This code works for me
public void getFileInformation(){
String strFile = "/Users/myUser/Documents/outputfile.csv";
BufferedReader br = null;
String strLine = "";
String ss = "$42,699,561.00";
try {
br = new BufferedReader(new FileReader(strFile));
while ((strLine= br.readLine()) != null) {
if(strLine.contains(ss)){
System.out.println ("Success");
}else{
System.out.println (strLine);
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
But the content "$42,699,561.00"; should really exist in the file
Related
I have text file with name pwd.txt located in projectfolder->src->pwd.txt
and I am accessing this file as follows:
File f1 = new File("src\\pwd.txt");
if(f1.exists()==false){
System.out.println("file not");
}
FileReader fr = new FileReader(f1);
while ((ch = fr.read()) != -1) {
pass = pass + (char) ch;
}
LoginForm.pwd = pass;
fr.close();
Well, let me tell you first that I am able to access this file when running within the IDE (Eclipse) but I am not able to access that filepwd.txt when I have made the jar file.
When i saw the contents of that jar file, I can see the file pwd.txt
Try following code, i hope it will help you.
BufferedReader br = null;
//first open the file
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream("src\\pwd.txt")));
} catch (FileNotFoundException e) {
System.out.println("File not found!");
return;
}
try {
String line = br.readLine();
while (line != null) {
System.out.println(line);
line = br.readLine();
}
br.close();
} catch (IOException e) {
System.out.println("ERROR:"+e);
}
Hey friends try to replace some commas in my database, can someoone give me advide what wrong is with my code, have already the replace eveything is done, but nothing happends
try {
BufferedReader br = new BufferedReader(new FileReader("C:/Users/Sei_Erfolgreich/Desktop/convert.txt"));
String zeile; try {
while ((zeile = br.readLine()) != null) {
zeile = zeile.replaceAll("\",\"", "\uffff")
.replaceAll(",", "")
.replaceAll("\uffff", "\",\"");
System.out.println(zeile);
}
File newTextFile = new File("C:/Users/Sei_Erfolgreich/Desktop/convert2.txt");
FileWriter fw = new FileWriter(newTextFile);
fw.write(zeile);
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e1) {
e1.printStackTrace();
}
}
}
you are writing string after coming out from loop so that string whould be null, try out this code
try {
BufferedReader br = new BufferedReader(
new FileReader("C:/Users/Sei_Erfolgreich/Desktop/convert.txt"));
String zeile;
try {
File newTextFile = new File("C:/Users/Sei_Erfolgreich/Desktop/convert2.txt");
FileWriter fw = new FileWriter(newTextFile);
while ((zeile = br.readLine()) != null) {
zeile = zeile.replaceAll("\",\"", "\uffff").replaceAll(",",
"").replaceAll("\uffff", "\",\"");
System.out.println(zeile);
fw.write(zeile);
}
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (FileNotFoundException e1) {
e1.printStackTrace();
}
Try this :
BufferedReader br = new BufferedReader(new FileReader("C:/Users/Sei_Erfolgreich/Desktop/convert.txt"));
File newTextFile = new File("C:/Users/Sei_Erfolgreich/Desktop/convert2.txt");
FileWriter fw = new FileWriter(newTextFile);
String zeile;
try {
while ((zeile = br.readLine()) != null) {
zeile = zeile.replaceAll("\",\"", "\uffff").replaceAll(",", "").replaceAll("\uffff", "\",\"");
System.out.println(zeile);
fw.write(zeile);
}
fw.close();
}
Earlier what you were doing, you read the file until last line and saving only one last line instead of whole file text.
You're writing null because you don't write until after your while loop (which terminates when zeile is null). Also, you should be closing everything in a finally block (or using a try-with-resources. Also, I suggest you use a PrintWriter so you can match your System.out.println()(s). Something like,
File newTextFile = new File("C:/Users/Sei_Erfolgreich/Desktop/convert2.txt");
try (BufferedReader br = new BufferedReader(new FileReader(
"C:/Users/Sei_Erfolgreich/Desktop/convert.txt"));
PrintWriter fw = new PrintWriter(newTextFile)) {
String zeile;
while ((zeile = br.readLine()) != null) {
zeile = zeile.replaceAll("\",\"", "\uffff").replaceAll(",", "")
.replaceAll("\uffff", "\",\"");
System.out.println(zeile);
fw.println(zeile);
}
} catch (Exception e) {
e.printStackTrace();
}
I'm having a problem with reading and writing arraylist to a text file. Specifically with reading. What I'm trying to do is read from a text file and transfer it to an array list. After which i would edit the list and write it back to the text file. I think I go the writing done but not the reading. I've tried reading several similar questions here but cant seem to inject it into my code.
Reading code
public void read(List<AddressBook> addToList){
BufferedReader br = null;
try {
String currentLine= "";
br = new BufferedReader(new FileReader("bank_account.csv"));//file na gusto mo basahin
while ((currentLine = br.readLine()) != null) {
System.out.println(currentLine); // print per line
for (AddressBook read : addToList) {
br.read(read.getName() + read.getAddress() + read.getTelNum() + read.getEmailAdd());
addToList.add(read);
} }
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)
{
br.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
}
Here's what I've done with the write
public void write(List<AddressBook> addToList) {
try {
File file = new File("bank_account.csv"); //file
// if file doesnt exists, then create it
if (!file.exists()) {
file.createNewFile();
}
//FileWriter fw = new FileWriter(file.getAbsoluteFile());
FileWriter fw = new FileWriter(file.getAbsoluteFile(), true);
BufferedWriter bw = new BufferedWriter(fw);
for (AddressBook write : addToList) {
bw.write(write.getName() + "," + write.getAddress() + "," + write.getTelNum() + "," + write.getEmailAdd());
bw.newLine();
}
bw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
while ((currentLine = br.readLine()) != null) {
System.out.println(currentLine); // print per line
for (AddressBook read : addToList) {
br.read(read.getName() + read.getAddress() + read.getTelNum() + read.getEmailAdd());
addToList.add(read);
}
}
I bet in there you will need to do something like:
reading each line
parsing it (each line is a CSV)
creating a new AddressBook object with all that info
add it to the collection
The code for that will look like:
while ((currentLine = br.readLine()) != null) {
System.out.println(currentLine); // print per line
String[] splitted = currentLine.split(",");
AddressBook address = new AddressBook(splitted[0], splitted[1], splitted[2], splitted[3]);
addToList.add(address);
}
Of course there are things you will need to check and validate, but that is roughtly it.
Maybe you need read method like this.
public void read() {
List<AddressBook> addToList =new ArrayList<AddressBook>();
BufferedReader br = null;
try {
String currentLine= "";
br = new BufferedReader(new FileReader("bank_account.csv"));//file na gusto mo basahin
while ((currentLine = br.readLine()) != null) {
System.out.println(currentLine); // print per line
// for (AddressBook read : addToList) {
String[] split =currentLine.split(",");
AddressBook read = new AddressBook();
read.setName(split[0]);
read.setAddress(split[1]);
read.setTelNum(split[2]);
read.setEmailAdd(split[3]);
// br.read(read.getName() + read.getAddress() + read.getTelNum() + read.getEmailAdd());
addToList.add(read);
// }
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)
{
br.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
I want to read the 2nd line of text from a file and have that put into an array. I already have it working on the first line.
[ Code removed as requested ]
The while loop above shows how I read and save the 1st line of the text file into an array. I wish to repeat this process from the 2nd line only into a different array.
File Content:
Sofa,Armchair,Computer Desk,Coffee Table,TV Stand,Cushion,Bed,Mattress,Duvet,Pillow
599.99,229.99,129.99,40.00,37.00,08.00,145.00,299.99,24.99,09.99
Just get rid of the first readLine() call, and move the String.split() call into the loop.
Simply use the BufferedReader class to read the entire file and then manipulate the String output.
Something along these lines
public static String readFile(String fileName) throws IOException {
String toReturn = "";
BufferedReader br = null;
try {
String sCurrentLine;
br = new BufferedReader(new FileReader("test.txt"));
while ((sCurrentLine = br.readLine()) != null) {
toReturn = toReturn+"\n"+sCurrentLine;
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)br.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
return toReturn;
}
would yield a String which can then be easily used.
public static void main(String[] args)
{
String filePath = args[0];
String[] lineElements = getLine(filePath,2).split(",");
}
public static String getLine(String path,int line)
{
List<String> cases = new ArrayList<String>();
try{
BufferedReader br = new BufferedReader(new FileReader(path));
String currLine = "";
while((currLine = br.readLine()) != null){
cases.add(currLine);
}
}catch(IOException ex){
ex.printStackTrace();
}
return cases.get(line - 1);//2nd line
}
so i am new to java.please offer some sample codes if possible.
The situation is i have a html format in a text file. i need to read the file and find the string after a pattern which is 'data-name'. i need to find every string after the "data-name" through the entire text file. i did some research online . i already used html parser to get the html and store it in a text file. i know i might need to use regular expression. so please help me. Thank you guys!
below is my code for getting the html. the result is concatenated.
public static void main(String[] args) {
try {
URL url = new URL("https://twitter.com/search?q=%23JENOSMROOKIESOPENFOLBACK&src=tren");
// read text returned by server
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String line;
PrintWriter out = new PrintWriter(new FileWriter("C:/Users/Desktop/htmlsourcecode.txt"));
while ((line = in.readLine()) != null) {
System.out.println(line);
out.print(line);
}
out.close();
}
How about something like this
// External resource(s).
BufferedReader in = null;
PrintWriter out = null;
try {
URL url = new URL(
"https://twitter.com/search?q=%23JENOSMROOKIESOPENFOLBACK&src=tren");
// read text returned by server
in = new BufferedReader(new InputStreamReader(
url.openStream()));
String line;
// out = new PrintWriter(new FileWriter(
// "htmlsourcecode.txt"));
final String DATA_NAME = "data-name=\"";
while ((line = in.readLine()) != null) {
int pos1 = line.indexOf(DATA_NAME); // opening position.
if (pos1 > -1) { // did we match?
// Add the length of the string.
pos1 += DATA_NAME.length();
// find the closing quote.
int pos2 = line.indexOf("\"", pos1 + 1);
if (pos2 > -1) {
String dataName = line.substring(pos1,
pos2);
System.out.println(dataName);
// out.print(line);
}
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
// Close external resource(s).
if (in != null) {
try {
in.close();
} catch (IOException e) {
}
}
if (out != null) {
out.close();
}
}