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PrintWriter object variable cannot resolve to type when used in try with resources

I'm trying to create a new PrintWriter object within a try with resources block as below, but it's giving me an error saying outFile cannot be resolved to a type:
public class DataSummary {
PrintWriter outFile;
public DataSummary(String filePath) {
// Create new file to print report
try (outFile = new PrintWriter(filePath)) {
} catch (FileNotFoundException e) {
System.out.println("File not found");
e.printStackTrace();
}
}
EDIT:
A reason why I didn't want to declare the PrintWriter object within the try block is because I want to be able to reference the outFile object in other methods of my class.
It seems like I can't do it with try with resources, so I created it within a normal try/catch/finally block.
The text file is being created. However, when I try to write to file in another method, nothing seems to be printing in the text file, test.txt.
Why is this??
public class TestWrite {
PrintWriter outFile;
public TestWrite(String filePath) {
// Create new file to print report
try {
outFile = new PrintWriter(filePath);
} catch (FileNotFoundException e) {
System.out.println("File not found");
e.printStackTrace();
} finally {
outFile.close();
}
}
public void generateReport() {
outFile.print("Hello world");
outFile.close();
}
}

Instead of trying to do everything in a constructor, I will demonstrate the preferred way to use a try-with-resources and invoke another method. Namely, pass the closeable resource to the other method. But I strongly recommend you make the opener of such resources responsible for closing them. Like,
public void writeToFile(String filePath) {
try (PrintWriter outFile = new PrintWriter(filePath)) {
generateReport(outFile);
} catch (FileNotFoundException e) {
System.out.println("File not found");
e.printStackTrace();
}
}
private void generateReport(PrintWriter outFile) {
outFile.print("Hello world");
}

Generate doc use docx4j, it gose different on windows and linux server

when I use docx4j to generate doc from HTML and output through java servlet, it works well on Windows system, I can download and open the doc file normally.
When I put the project on Linux server, I can also download the doc file, but when openging file, it alert that the file is broken. I must click the confirm and restore the file.then open it normally.
my core code is like this.
how can i get the same result as windows?
code in jsp:
String vhtml = DownHtml2DocUtil.replaceSvgData2Base64(request);
response.reset();
response.setContentType("application/octet-stream");//设置为字节流
OutputStream output = null;
try {
output = response.getOutputStream();
response.addHeader("Content-Disposition", "attachment;filename=" + System.currentTimeMillis() + ".doc");
DownHtml2DocUtil.genDocFromHtml(vhtml, output);
} catch (Exception e) {
} finally {
try {
if (output != null) {
output.close();
}
} catch (Exception e) {
}
}
response.flushBuffer();
out.clear();
out = pageContext.pushBody();
code in java like this:
public static void genDocFromHtml(String html, OutputStream out)
throws EMPException {
try {
WordprocessingMLPackage wordMLPackage;
wordMLPackage = WordprocessingMLPackage.createPackage();
XHTMLImporterImpl XHTMLImporter = new XHTMLImporterImpl(
wordMLPackage);
wordMLPackage.getMainDocumentPart().getContent()
.addAll(XHTMLImporter.convert(html, "utf-8"));
// wordMLPackage.save(out); -- i tried both method
new Save(wordMLPackage).save(out);
} catch (InvalidFormatException e) {
throw new EMPException(e);
} catch (Docx4JException e) {
throw new EMPException(e);
} catch (Exception e) {
e.printStackTrace();
}
}
any suggestion will be appreciate , thanks anyway;

How do I close this file writer? (Java, Bukkit)

try {
FileWriter fw = new FileWriter("plugins/TestMessage/messages.txt", true);
} catch (IOException e) {
e.printStackTrace();}
}
Hey guys, I know this may sound noobish but how do I close this FileWriter. The code is in java. I have an onDisable() method that gets called when the server is stopped but when I put fw.close(); It says fw cannot be resolved. Please help!
The relevant section of the code is
public class MAIN extends JavaPlugin{{
try {
FileWriter fw = new FileWriter("plugins/TestMessage/messages.txt", true);
} catch (IOException e) {
e.printStackTrace();}
}
public void onEnable(){
Logger.getLogger("Minecraft").info("MessageBroadcaster made by cheeseballs500 aka weakwizardsucks2");
}
public void onDisable(){
fw.close();//fw cannot be resolved
}
EDIT: Fixed :D

Try creating the FileWriter outside of any methods, then setting it to something in your onEnable()... Here's an example:
public class Main extends JavaPlugin{{
FileWriter fw;//create the variable
#Override
public void onEnable(){
try{
fw = new FileWriter(this.getDataFolder() + "/messages.txt", true); //assign the variable to a value, and put the file in your plugin's folder
}
catch(IOException e){
e.printStackTrace();
}
}
#Override
public void onDisable(){
try{ //try-catch just incase
fw.close();
}
catch(Exception e){
e.printStackTrace();
}
}
}

Try this..
public class MAIN extends JavaPlugin{
public MAIN() {
try {
this.fw = new FileWriter("plugins/TestMessage/messages.txt", true);
} catch (Exception e) {
// TODO: handle exception
}
}
FileWriter fw = null;
public void onEnable(){
Logger.getLogger("Minecraft").info("MessageBroadcaster made by cheeseballs500 aka weakwizardsucks2");
}
public void onDisable(){
try {
fw.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}//fw cannot be resolved
}
}

Webdriver TestNG NullPointer Exception

I am trying to run TestNG testcases which are InterDependent say in a Travel site Test cases are 1st) Login 2nd) Booking 3rd) Cancellation etc.
I am facing 'NullPointer exception' on When Webdriver is Called on 2nd Test..
Any Idea as I have also declared Driver as public static.
I am reading the Locators from a Properties File.
Is It a TestNG bug ?
Here's my Code, Please Scroll Down to see the Pointer exception..
public class LoginTest {
public static WebDriver driver;
public static Properties p;
public static FileInputStream f ;
#Test
public void loginTest() {
System.out.println("Enter LoginTest");
Properties p=new Properties();
FileInputStream f = null;
try {
f = new FileInputStream("D:\\BOSSFramework\\Framework\\locators.properties");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
p.load(f);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
WebDriver driver = new FirefoxDriver();
driver.get("https://in3.seatseller.travel/");
driver.manage().window().maximize();
// Login Process Starts here ..
try{
driver.findElement(By.name(p.getProperty("login.username.textfield"))).sendKeys("user");
driver.findElement(By.name(p.getProperty("login.password.textfield"))).sendKeys("password");
WebElement ele =driver.findElement(By.id(p.getProperty("login.signin.button")));
ele.click();
/*String classValue = ele.getAttribute("class");*/
}
catch (Exception e) {
}
}
#Test (dependsOnMethods={"loginTest"})
public void booking() throws InterruptedException{
System.out.println("Enter Booking");
// Type Bangalore on Source Field..
Properties p=new Properties();
FileInputStream f = null;
try {
f = new FileInputStream("D:\\BOSSFramework\\Framework\\locators.properties");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
p.load(f);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
/*Null Pointer is on Below Line*/
WebDriverWait wait = new WebDriverWait(driver, 30);
wait.until(ExpectedConditions.presenceOfElementLocated(By.xpath(p.getProperty("oneapp.source.textfield"))));
driver.findElement(By.xpath(p.getProperty("oneapp.source.textfield"))).sendKeys("Bangalore");
driver.findElement(By.xpath(p.getProperty("oneapp.source.textfield"))).sendKeys(Keys.TAB);
Thread.sleep(900L);

The issue is that you're declaring WebDriver driver in loginTest(), then trying to reference the loginTest() instance of driver in booking().
If you modify loginTest() as follows, it should work:
driver = new FirefoxDriver();

FileOuputStream Write bytes for loop, but no data write?

Listing my program fragment as below
public class InStream {
static FileOutputStream file=null;
static {
try {
file = new FileOutputStream("deo.txt");
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
try {
//when i try to replace below infinite loop,
//it is also not able to output my String
//while(ture)
or
//for(;;)
for(int i=0;i<100000;i++){
file.write("AB ".getBytes());
}
//file.flush();
file.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Run this program -> open deo.txt -> there are no data within this file
but when i comment the for loop just only test below fragment code:
try {
file.write("AB ".getBytes());
file.close();
} catch (Exception e) {
e.printStackTrace();
}
Now i can see the "AB " string in the file. so strange....
Can any one do me a favor?

There is no error in your code. File "deo.txt" must be generate which contains AB AB...............

I tested your code. And it works. But for the deo.txt. You can check its size if it is about 293k. It displays nothing if you open it with Eclipse text editor. But you can view it with other system editor, such as notepad++.