To view the Java console, right click on the Java icon in the system tray (assuming you're using Windows) and choose "Open console" - as pictured at the bottom of this page

Answer from George3 on Stack Exchange
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Oracle
docs.oracle.com › javase › 8 › docs › technotes › guides › deploy › console_trace_log.html
22 Java Console, Tracing, and Logging
April 21, 2026 - Tracing set through the Control Panel takes effect when Java Plug-in or Java Web Start is launched, but changes made through the Control Panel while Java Plug-in or Java Web Start is running has no effect until restarted. ... Click Advanced tab. ... If the environment variable USER_JPI_PROFILE is set to <user plugin home> then the trace and log files will be written to:
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Oracle
java.com › en › download › help › javaconsole.html
How do I enable and view the Java Console?
Platform(s): Windows 10, Windows 7, Windows 8, Windows Vista, Windows XP, macOS · The Java Console provides information about the Java version, user home directory, and any error message that occurs while running an applet or application. You can enable the Java Console for the Windows platform using the Java Control Panel or the Java icon displayed in the Windows system tray.
Discussions

windows - Java Console Logs not getting written to disk with an Applet - Stack Overflow
In the Java Control Panel, I have enabled tracing and logging. I am troubleshooting a Java Applet. The Java logs appear in the Java Console but aren't written to disk. I checked in %APPDATA%\sun\... More on stackoverflow.com
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Log console output to a log file Java logger - Stack Overflow
I am trying to write all my console output to a log file using the Java Logger class. More on stackoverflow.com
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java.util.logging - Java Logging - where is my log file? - Stack Overflow
It seems that the default location has changed. To find your logfile open the Java Console with your application. in there press "s". More on stackoverflow.com
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Crossplay on realms

Java is separate from bedrock. PS4 is also different from java and bedrock. Only bedrock editions can play on a bedrock realm. Like switch, Xbox, pc (not java), and mobile.

A java realm could play with pc and Mac.

Edit:spelling

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Customer Support
support.quotemedia.com › support › solutions › articles › 13000005197-enabling-and-capturing-java-logs-windows-
Enabling and Capturing Java Logs (Windows) : Customer Support
February 7, 2017 - 2. In the Java Control panel, select the 'Advanced' tab and ensure that under Debugging 'Enable tracing,' and 'Enable logging,' are selected, as well as 'Show console' under Java Console.
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Windows 10 Forums
tenforums.com › general-support › 96907-accessing-java-log.html
Accessing the Java log? - Windows 10 Help Forums
October 31, 2017 - I've had Java installed on my PCs for decades. But I'm wondering if it actually does anything. If not I'll probably uninstall it. I've just switched on the 'Enable logging' option via Settings > Co
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Core Technologies
coretechnologies.com › home › blog › how can i see my java console window running as a windows service?
How can I see my Java Console Window Running as a Windows Service?
December 15, 2025 - I am running a Java JAR application as a windows service with AlwaysUp. How can I see the Java console window to make sure that there are no errors?
Find elsewhere
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Ixiasoft
ixiasoft.com › documentation › IXIASOFT_CCMS › 5.0 › Administration_Guides › per1389986400062_7.html
Turn on the Java Console
This procedure describes how to turn on the Java Console and enable its debugging and logging options.
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Oracle
docs.oracle.com › javase › 7 › docs › technotes › guides › jweb › jcp › tracing_logging.html
Tracing and Logging
Similar to tracing, logging is a facility to redirect any output in the Java Console to a log file using the Java Logging API. To enable logging perform the following actions: ... Click Advanced tab. ... If the environment variable USER_JPI_PROFILE is set to <user plugin home> then the trace and log files will be written to: <user plugin home>/.java/deployment/log on UNIX, Linux · <user plugin home>/Library/Application Support/Oracle/Java/Deployment/log on Mac OS X · <user plugin home>\Sun\Java\Deployment\log on Windows
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Stack Overflow
stackoverflow.com › questions › 39810204 › log-console-output-to-a-log-file-java-logger › 39819741
Log console output to a log file Java logger - Stack Overflow
I am trying to write all my console output to a log file using the Java Logger class. public static Logger logger = Logger.getLogger("Log"); public static FileHandler fh; public static ConsoleH...
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GitHub
gist.github.com › rendoaw › 98f90ddb13c6d017983b
JAVA Log File Location · GitHub
* <user plugin home>/.java/deployment/log on UNIX, Linux * <user plugin home>/Library/Application Support/Oracle/Java/Deployment/log on Mac OS X * <user plugin home>\Sun\Java\Deployment\log on Windows
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Hitachi
itpfdoc.hitachi.co.jp › manuals › 3021 › 3021336100e › H3610046.HTM
3.5.2 Collecting a Java console log : Job Management Partner 1/Data Highway - Server User's Guide
Job Management Partner 1 Version 10 Job Management Partner 1/Data Highway - Server User's Guide ... If you cannot solve the problem, collect log data by following the procedure below and then send the log file to the system administrator. ... From the Start menu, click Control Panel. The Control ...
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IBM
ibm.com › support › pages › enable-java-console-logging
Enable Java Console logging
How can the console logging be turned on to trace the TADDM GUI processing? [{"Product":{"code":"SSPLFC","label":"Tivoli Application Dependency Discovery Manager"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":"--","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF033","label":"Windows"}],"Version":"All Versions","Edition":"","Line of Business":{"code":"LOB77","label":"Automation Platform"}}] This document has the abstract of a technical article that is available to authorized users once you have logged on.
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Sentry
blog.sentry.io › a-guide-to-logging-and-debugging-in-java
Logging & Debugging in Java - Guide | Sentry Blog
September 25, 2025 - 2024-11-18 14:30:00 INFO LoggingVariablesExample: Dividing 50 by 10 2024-11-18 14:30:00 INFO LoggingVariablesExample: Result: 5 · Now, say we want to log an exception that occurs when dividing by zero, and we want to see the stack trace. We’ll change the b variable’s value to 0: import java.util.logging.Logger; import java.util.logging.Level; public class LoggingVariablesExample { private static final Logger logger = Logger.getLogger(LoggingVariablesExample.class.getName()); public static void main(String[] args) { int a = 50; int b = 0; logger.info("Dividing " + a + " by " + b); try { int result = divide(a, b); logger.info("Result: " + result); } catch (ArithmeticException e) { logger.severe("Error: " + e.getMessage()); logger.log(Level.SEVERE, "Exception occurred", e); } } public static int divide(int x, int y) { return x / y; } }
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Loggly
loggly.com › home › java logging basics
Java Logging Basics - The Ultimate Guide To Logging - Loggly
June 27, 2025 - For example, java.util.logging provides two Layouts: the SimpleFormatter and the XMLFormatter. SimpleFormatter, the default Layout for ConsoleHandlers, outputs plain text log entries similar to this: May 14, 2019 10:47:51 AM MyClass main SEVERE: An exception occurred.