We are migrating our application from Java 1.6 to Java 1.7. We recompiled the code using Java 1.7 and received an error while compiling which was due to a character (an Ó).
Was there a change in Java 1.7 related to characters? Our application does a lot of processing of incoming files to then load them into a database and I want to ensure that when we upgrade to Java 1.7 that the reading of a file from java and the writing to the database of that content wont result in some odd character conversions.
Do I need to be concerned at all when upgrading to 1.7? If so, how to I get the same encoding that we had in Java 1.6?
The error occurs because you've told the Java compiler that your source is UTF-8 encoded, but it still contains some ISO-8859-1 extended characters. I recently had to fix similar errors in a codebase that was migrated from 1.5 to 1.6. I believe that Java 7 is much stricter about UTF-8 encoding than previous versions and will issue errors where previously the incorrect encodings were silently accepted.
You will need to make sure that your source code is "Unicode-clean", that is, you must replace any extended ISO-8859-1 characters with their Unicode equivalents.
I ran into this problem on Windows and discovered that the default encoding for 1.7 was CP-1252. I was able to get clean compiles by setting to following environment variable...
JAVA_TOOL_OPTIONS = -Dfile.encoding=UTF8
Related
I have an Enum class in Java that contains the letter É:
public enum Types {
RÉSUMÉ
}
When trying to build the project, IntelliJ complains on the É sign:
error: illegal character: '\u2030'
RÉSUMÉ
^
I'm using Windows 10.
In the past, the same project was compiled and run with no problems on my computer. So it seems like something in the settings was changed that caused this.
There is no option to replace É with E
Any idea how to fix this?
EDIT
The code used to run with JDK 11 and was upgraded to Java 17. Maybe it has something to do with it. Trying to downgrade the JDK of the project (Settings -> Build -> Gradle -> back to JDK 11) didn't help
Character set & encoding of Java source code files
As commented, likely your source code files were written with a character encoding other than UTF-8. Now your compiler is expecting UTF-8, and reading your source code as such.
This problem could occur for either of two reasons:
Your settings for your compiler or IDE changed
👉 You changed your JDK from an earlier version of Java to Java 18 or later.
Earlier versions of Java by default expect source code to be written in the default character set of the host OS platform.
Java 18+ defaults to UTF-8 across OS platforms for most purposes.
The main clue for this character encoding misreading hypothesis is that code point U+2030 is not the LATIN CAPITAL LETTER E WITH ACUTE character, nor is it the composition of an uppercase E followed by the accent. No, the code point 2030 in hex (8,240 in decimal) is PER MILLE SIGN: ‰.
Java 18+ defaults to UTF-8
See JEP 400: UTF-8 by Default. To quote:
If source files were saved with a non-UTF-8 encoding and compiled with an earlier JDK, then recompiling on JDK 18 or later may cause problems. For example, if a non-UTF-8 source file has string literals that contain non-ASCII characters, then those literals may be misinterpreted by javac in JDK 18 or later unless -encoding is used.
You can easily verify if this new default is the source of your problem. 👉 Go back to your old project, and specify UTF-8 for compiling. Again, quoting the JEP:
Prior to compiling on a JDK where UTF-8 is the default charset, developers are strongly encouraged to check for charset issues by compiling with javac -encoding UTF-8 ... on their current JDK (8-17).
I want to know how some of special character automatically convert. Example
Unicode: 0x3 is converted to (you can see this got converted &#three; . i have changed 3 to three) I am not sure how this convert automatically.
I am using java 1.6 and below is JAXB info.
xjc version "JAXB 2.1.10 in JDK 6"
JavaTM Architecture for XML Binding(JAXB) Reference Implementation, (build JAXB 2.1.10 in JDK 6)
Above conversion happening on one of our test environment, however if i try to do same in my local machine i am getting below exception
at javax.xml.bind.helpers.AbstractUnmarshallerImpl.createUnmarshalException(AbstractUnmarshallerImpl.java:315)
at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.createUnmarshalException(UnmarshallerImpl.java:505)
I have spent a lot of time to figure this but not able to find any answer.Just to clear , i have checked and in code we do not have any escape custom class.
I have validated this jrocket jdk and as well as sun jdk but i have same problem. In test environment we are having jrocket jdk.
Is some face same issue ? Is this issue related to JAXB or it can be related to java ?
I am currently working on a class project with codename one and am running into issues with the built in InputStream and MediaManager classes. It keeps telling me that the feature I am attempting to use is from Java version 1.7.0_06 and to update when I am already using Java 1.8.
My error message is as follows:
java.io.IOException: This fetaure is supported from Java version
1.7.0_06, update your Java to enable this feature
My code is:
InputStream is = Display.getInstance().
getResourceAsStream(getClass(), "/"+fileName);
m = MediaManager.createMedia(is, "mp3",this);
I would post more of the error message/code but Stack overflows "indent" algorithm is messing up when I try to post the full code or error message.
The code you listed above should work for Java 5 and even before that so it's not the problem.
However you should run under Java 8 which is the minimum supported version for Codename One. Make sure your build.xml doesn't contain 1.5 references, if it does replace them all with 1.8. Also make sure the IDE's JVM is a Java 8 JVM and the language level is set to 8.
You might be using java 8 but your program is still executing on ols version. If you are using maven or ANT specify the version of java to 1.8 and if you are running through console, use below :-
http://docs.oracle.com/javase/1.5.0/docs/tooldocs/windows/javac.html
javac -source 1.8 -target 1.8 YourFile.java
I am having a bit of trouble determining if I am running the correct version of Eclipse and/or Java. I am attempting to make changes to a JAXB program for work. I can't run the program and an error is generated that states
java.lang.UnsupportedClassVersionError: RunISOPaymentFileSimulator : Unsupported major.minor version 51.0
I know from doing my research using the search function this means that I need version J2SE 7.
After searching for my current version I find that I have Java 6 Standard Edition build 1.6.0.
My question is this: Is Java 6 the same thing as J2SE 6? Do I need to just update my Java version to 7 or do I need to also find the special J2SE 7?
Thanks very much!
Neither Java not J2SE is specific enough. What you need is the Java 7 JRE (Java Runtime Environment.) You probably already have it but your JAVA_HOME is set to 6. Changing your JAVA_HOME can cause issues for some applications that are written poorly so be prepared to have to switch it back.
http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html
I am on Ubuntu x64 bit running:
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-0ubuntu1)
OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)
and
jruby 1.4.0 (ruby 1.8.7 patchlevel 174) (2010-02-11 6586) (OpenJDK 64-Bit Server VM 1.6.0_18) [amd64-java]
I have this code running on my Windows 7 computer at home. I recently copied over my whole folder over to Ubuntu, installed java, jruby, and associated gems but I get this error when I run my main file:
jruby run.rb test
=================Processing FREDERICKSBURG_1.1=======================
ERROR IN TESTING wrong element type class java.lang.String(array contains char)
/home/daryl/Desktop/work/Code/geografikos/lib/sentence_splitter/splitter.rb:21:in `to_java'
/home/daryl/Desktop/work/Code/geografikos/lib/sentence_splitter/splitter.rb:21:in `split'
/home/daryl/Desktop/work/Code/geografikos/lib/models/page.rb:103:in `sentences'
/home/daryl/Desktop/work/Code/geografikos/lib/extractor/lingpipe_svm.rb:34:in `extract'
/home/daryl/Desktop/work/Code/geografikos/lib/extractor/geo_controller.rb:9:in `process'
/home/daryl/Desktop/work/Code/geografikos/lib/extractor/geo_controller.rb:8:in `each'
/home/daryl/Desktop/work/Code/geografikos/lib/extractor/geo_controller.rb:8:in `process'
/home/daryl/Desktop/work/Code/geografikos/lib/extractor/geo_controller.rb:6:in `each'
/home/daryl/Desktop/work/Code/geografikos/lib/extractor/geo_controller.rb:6:in `process'
/home/daryl/Desktop/work/Code/geografikos/lib/statistics.rb:111:in `generate_all'
/home/daryl/Desktop/work/Code/geografikos/lib/statistics.rb:105:in `each'
/home/daryl/Desktop/work/Code/geografikos/lib/statistics.rb:105:in `generate_all'
run.rb:56
The focus of the error is:
ERROR IN TESTING wrong element type class java.lang.String(array contains char)
Everything works fine on my windows machine. I figured I was getting this error because I did not have JAVA_HOME set however I added this to bashrc as:
export JAVA_HOME=/usr/lib/jvm/java-1.6.0-openjdk
and have confirmed:
echo $JAVA_HOME
/usr/lib/jvm/java-1.6.0-openjdk
I can produce a similar error by removing my JAVA_HOME variable on windows:
=================Processing FREDERICKSBURG_1.3=======================
ERROR IN TESTING cannot convert instance of class org.jruby.RubyString to char
C:/work/Code/geografikos/lib/sentence_splitter/splitter.rb:21:in `to_java'
C:/work/Code/geografikos/lib/sentence_splitter/splitter.rb:21:in `split'
C:/work/Code/geografikos/lib/models/page.rb:103:in `sentences'
C:/work/Code/geografikos/lib/extractor/lingpipe_svm.rb:34:in `extract'
C:/work/Code/geografikos/lib/extractor/geo_controller.rb:9:in `process'
C:/work/Code/geografikos/lib/extractor/geo_controller.rb:8:in `each'
C:/work/Code/geografikos/lib/extractor/geo_controller.rb:8:in `process'
C:/work/Code/geografikos/lib/extractor/geo_controller.rb:6:in `each'
C:/work/Code/geografikos/lib/extractor/geo_controller.rb:6:in `process'
C:/work/Code/geografikos/lib/statistics.rb:111:in `generate_all'
C:/work/Code/geografikos/lib/statistics.rb:105:in `each'
C:/work/Code/geografikos/lib/statistics.rb:105:in `generate_all'
run.rb:56
It is obviously not exactly the same but I have a feeling this has to do with the java path. You can probably derive from the error that I am just trying to convert a ruby variable to java using to_java. This works fine on my windows machine and I have confirmed the gems are the same but I don't think this has to do with gems.
I lied. I changed my JAVA_HOME back on my windows machine and this error still occurs. So now the code suddenly doesn't run on either machine. I recently installed git on my windows machine and added the code to a repository. But I haven't really done anything with it. All it said was it will convert all LF to CRLF...That shouldn't change anything though should it? Any ideas on why I am now getting these errors? I haven't changed anything on my windows machine in months except for installing git.
Update: What is going on is I cannot convert a ruby string to a java char, even if the ruby string is only 1 char long. This has never happened before and my java files have not been updated for over 2 months. I have not updated ruby either.
Here is the line of code associated with the error at this point:
tokenizer = IndoEuropeanTokenizerFactory.new.tokenizer(text.split('').to_java(:char), 0, text.length)
Where text is just a clean text paragraph being split into each character. A similar reproduction:
irb(main):002:0> ['1','2','3'].to_java :char
ArgumentError: wrong element type class java.lang.String(array contains char)
from (irb):3:in `to_java'
from (irb):3
irb(main):003:0> exit
Converting a ruby string array to java array apparently isn't supported with the to_java command in the latest version of jruby (1.5 I believe). If you use 1.3 it should work fine.
['1','2','3'].to_java :char works OK for me in jruby 9.2.9.0.
For 1.5 maybe you have to do require 'java' or what not.