operating with java method, the result string is garbled(encoding error) about graaljs HOT 2 CLOSED

I am sorry, I am not able to reproduce this issue. I see the expected output. Have you tried to set name and password properties of RegisterUserReq (and print the output of UserService.register()) using pure Java (i.e. without the usage of JavaScript)? Does it print the expected output or is it garbled as well? I am curious if the issue is really caused by GraalVM or whether it is some issue of the tool that you use to display the test results.

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@iamstolis Oh, thank you for reminding me, I quickly checked the breakpoint and found that the code was indeed correct during execution, but the output was garbled.

Then I looked at all the encoding configurations of IDEA and found that they were all UTF-8. I tried to add -Dfile.encoding=UTF-8 and -Dconsole.encoding=UTF-8 VM options for IDEA, but it was useless at all, whether restart IDEA or restart the computer.

Just when I was frustrated, I thought about whether System.out had changed, and found that charset had indeed changed (it did not use the charset specified by -Dfile.encoding, but followed the default charset of the operating system) . I then changed the charset via the System.setOut method and it finally worked.

Finally, I continued to search and found that this is a bug of JDK19. The official provides a new -Dstdout.encoding=UTF-8 property to control the charset of System.out. See here.

Thanks :)

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