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Questions tagged [printstream]

175 questions
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PrintStream not creating a file?

I get an error at line 58 which says the file isn't found, but shouldn't the PrintStream have created the file? (Note: No file is created at all.) Thanks! WhyDoINeedToAddMoreDetailIAlreadySaidWhatINeedToSay import java.io.*; import…
Locke
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Java: Two threads communicating via streams is company, three's a crowd

In this code segment, I create a pipe and attach a Scanner on one end and a PrintStream on the other in order to communicate between several consumer and producer threads. Then I create and start three threads: The first thread is a consumer…
David Stigant
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Write console output of numbers to text file

quick question, I don't know what I'm missing here. If I have a console output of 9 numbers in a row, and 9 total rows, how would I go about writing that exact output to an external text file, so it looks the same way in the text file. Assuming the…
user5560769
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3 answers

Default Classes imported in java

I have a simple code: public class Hello { public static void main(String[] args) { System.out.println("Hello World"); } } I know that Object class is imported by default in every java program, but I wanted to ask whether…
Frosted Cupcake
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What is the best way, if possible, to send information from a Java PrintStream to a JTextPane?

In Java, I have a package that translates XML metadata from one standard to another. This package is ultimately accessed through a single function and sends all of its output through a PrintStream object. The output sent is just a status of each…
Daniel Reeves
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Java DataInputStream sometimes returns empty

I currently am making a messaging application which I will also add encryption to later. I have a server which opens a socket and waits for clients to connect. Once client connects, it creates a new thread for that client. and then waits for…
CLOO
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Java Socket OutputStream is not flushing

I am writing a socket-based server in java. A client connects to it(a web-browser) and the server sends back a simple html code and sets cookie to recognize next time client connects to it again. I am using PrintStream to write to the socket , but…
Farah
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Redirect lots of system.out.println's to a .txt file

Possible Duplicate: Print java output to a file In a Java program, I have a long method, (which I don't think is important to post since it's not vital to the question) that has a large number of println statements to print status updates to the…
CodyBugstein
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How to append an exception's StackTrace into a file in java?

In java, when we catch a exception, we usually can use printStackTrace() method to print the error information, and we can also use printStackTrace(PrintStream out) to direct those information to a file. But how can I append those information into…
Yishu Fang
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Java: PrintStream unexpectedly autoflushing

import java.io.PrintStream; import java.util.Scanner; public class OutputTest { public static void main(String[] args) { Scanner scan = new Scanner(System.in); PrintStream out = new PrintStream(System.out); …
Retsam
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Write data from standard out to text file in java not working

I am new to java programming and have been trying for the longest time to get the following code to work but although the program runs fine I don't seem to be seeing any output in the text file I am redirecting the output to. If someone could please…
anonuser0428
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Does a PrintWriter / PrintStream need to be flushed?

I'd like to use a PrintWriter or PrintStream to write formatted strings out to an outputstream (for which I have no control over the creation). However flushing the underlying OutputStream has a big performance hit. Does a PrintWriter / PrintStream…
Philip Couling
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Print stream does not format all values to 2 decimal places, but only some of them for text file

I am asked to make a bank account java program. I have made it and the values in the regular print works, but when I use print stream for the text file, half of the values have been changed, but the other half have not been changed to two decimal…
Aortax
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Why use Printwriter over PrintStream in Java for outputting human readable text

The java documentation says to use Printwriter over Printstream when dealing with text, but why is this so? I know Printwriter deals with character streams and Printstream deals with byte streams but their both bytes at the end of the day. And since…
sniperking
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Problem writing data from PrintStream to "Console as Process" and not "console as System.out" in Java

in Java 8, windows 10, i have a text app, i want to open a console and write something there, first try is: String [] cmd = {"cmd.exe", "/c", "start"}; ProcessBuilder f = new ProcessBuilder(cmd); f.redirectErrorStream(true); Process…
Ddll
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