在Ubuntu 13.10和OpenJDK上使用Ant

Question

So, I'm trying really hard to get Thinking In Java source code to work on Ubuntu 13.10 with OpenJDK, but I've run into a problem I've not been able to solve. So, I followed all the steps shown here:

http://www.mindviewinc.com/TIJ4/CodeInstructions.html

But when I try to compile everything using ant, when I type in the terminal ant build I get the following:

Buildfile: /home/juan/Documents/TIJ4-code/build.xml

build:

BUILD FAILED
/home/juan/Documents/TIJ4-code/build.xml:59: J2SE5 required

So first I reset my environment variables to make sure they were pointing at my JDK, by typing:

$ export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
$ export PATH=$PATH:$JAVA_HOME/bin

Tried again, so luck. So I decided to check what the line causing the problem (59 in build.xml) which read <fail message="J2SE5 required" unless="version1.5"/> . Running java -version returns the following:

java version "1.7.0_51"
OpenJDK Runtime Environment (IcedTea 2.4.4) (7u51-2.4.4-0ubuntu0.13.10.1)
OpenJDK 64-Bit Server VM (build 24.45-b08, mixed mode)

So, I replaced the xml line with <fail message="J2SE5 rEEEEquired" unless="version1.7.0_51"/> and got the exact same thing after running ant build , except for the text I changed:

Buildfile: /home/juan/Documents/TIJ4-code/build.xml

build:

BUILD FAILED
/home/juan/Documents/TIJ4-code/build.xml:59: J2SE5 rEEEEquired

I tried with 1.7.0, 1.7, with no luck. I even tried deleting the line but I get this:

Buildfile: /home/juan/Documents/TIJ4-code/build.xml

build:

build:

BUILD FAILED
/home/juan/Documents/TIJ4-code/build.xml:60: The following error occurred while executing this line:
/home/juan/Documents/TIJ4-code/object/build.xml:29: J2SE5 required

So yeah. I really don't want to install Oracle's JDK because it seems too much of a hassle and I'm not even sure it would work. I'm fairly new to java and ant and even linux so this stuff really puzzles me. I can compile files alright and everything works as expected with the JDK, it's ant and that line that's giving me problems. Thanks in advance, any help is appreciated.

Answer 1

You are almost there! You also need to delete line 29 in:

/home/juan/Documents/TIJ4-code/object/build.xml