The error "unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream" typically occurs when the Jansi library, which is used for ANSI escape code processing on Windows systems, is not properly installed or configured. Here are some steps you can try to fix the issue:
- Check if the Jansi library is on your classpath. If it is not, you will need to download it and add it to your classpath.
- Check if the Jansi native library is installed. On Windows, this is typically located in the JRE's bin directory. If it is not present, you will need to download the appropriate version of the Jansi native library for your platform and place it in the JRE's bin directory.
Make sure that the Jansi native library is loaded at runtime. This can usually be done by adding the following line of code to your application before any ANSI escape codes are used:
System.setProperty("jansi.passthrough", "true");
3. Make sure that the Jansi library is loaded before any other libraries that use ANSI escape codes.
4. If the problem persists, you may need to check the version of Jansi library and compare it with the version of JRE. Make sure that the version of Jansi library is compatible with the version of JRE.
Frequently Asked Questions About The Error
Q: What causes this error?
A: This error typically occurs when the Jansi library, which is used for ANSI escape code processing on Windows systems, is not properly installed or configured.
Q: What are the symptoms of this error?
A: The error message "unable to instantiate org.fusesource.jansi.WindowsAnsiOutputStream" will be displayed, and the application that is using ANSI escape codes may not function correctly.
Q: How can I fix this error?
A: You can try the following steps to fix this error:
- Check if the Jansi library is on your classpath.
- Check if the Jansi native library is installed.
- Make sure that the Jansi native library is loaded at runtime.
- Make sure that the Jansi library is loaded before any other libraries that use ANSI escape codes.
- check the version of Jansi library and compare it with the version of JRE.
Q: What is Jansi library?
A: Jansi is a Java library that provides ANSI escape code processing for Windows systems. It allows applications to use ANSI escape codes to change the color and other formatting of console output on Windows systems.
Q: Does this error only occur on Windows?
A: Yes, this error typically only occurs on Windows systems, as ANSI escape codes are handled differently on other platforms.
Q: Is there any alternative way to handle ANSI escape codes on Windows?
A: Yes, some alternatives are :
- ANSI Escape in Windows Console with C++
- ANSICON : a 3rd party tool that adds ANSI support to the Windows console.
- Console2 : a 3rd party console emulator that supports ANSI escape codes.