Question

您好我必须使用javase zxing模块。我已阅读zxing getting start并尝试编译core和javase模块（使用JDK 1.5.0_22）

我在核心文件夹中运行ant脚本，我有这个错误：

[javac] javac: invalid target release: 6

如果我修改核心文件夹中的ant脚本build.xml，将target=6替换为target=5，将source=6替换为source=5，我有42个编译错误：

init:

build:
    [javac] Compiling 169 source files to D:\ZXing-2.0\zxing-2.0\core\build
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\MultiFormatReader.j
ava:52: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\MultiFormatReader.j
ava:66: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\MultiFormatReader.j
ava:157: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\MultiFormatWriter.j
ava:40: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\MultiFormatWriter.j
ava:48: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\aztec\AztecReader.j
ava:52: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\aztec\AztecReader.j
ava:57: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\aztec\AztecReader.j
ava:89: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\datamatrix\DataMatr
ixReader.java:57: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\datamatrix\DataMatr
ixReader.java:62: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\datamatrix\DataMatr
ixReader.java:89: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\datamatrix\detector
\Detector.java:444: method does not override a method from its superclass
    [javac]     @Override
    [javac]      ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\maxicode\MaxiCodeRe
ader.java:58: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\maxicode\MaxiCodeRe
ader.java:63: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\maxicode\MaxiCodeRe
ader.java:84: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\multi\ByQuadrantRea
der.java:46: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\multi\ByQuadrantRea
der.java:52: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\multi\ByQuadrantRea
der.java:95: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\multi\GenericMultip
leBarcodeReader.java:55: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\multi\GenericMultip
leBarcodeReader.java:60: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\qrcode\QRCodeReader
.java:61: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\qrcode\QRCodeReader
.java:66: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\qrcode\QRCodeReader
.java:93: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\multi\qrcode\QRCode
MultiReader.java:47: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\multi\qrcode\QRCode
MultiReader.java:52: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\qrcode\detector\Fin
derPatternFinder.java:557: method does not override a method from its superclass

    [javac]     @Override
    [javac]      ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\qrcode\detector\Fin
derPatternFinder.java:573: method does not override a method from its superclass

    [javac]     @Override
    [javac]      ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\multi\qrcode\detect
or\MultiFinderPatternFinder.java:80: method does not override a method from its
superclass
    [javac]     @Override
    [javac]      ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\oned\OneDReader.jav
a:47: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\oned\OneDReader.jav
a:53: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\oned\OneDReader.jav
a:87: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\oned\OneDimensional
CodeWriter.java:40: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\oned\OneDimensional
CodeWriter.java:53: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\oned\UPCAWriter.jav
a:36: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\oned\UPCAWriter.jav
a:42: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\pdf417\PDF417Reader
.java:53: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\pdf417\PDF417Reader
.java:58: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\pdf417\PDF417Reader
.java:76: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\pdf417\encoder\PDF4
17Writer.java:32: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\pdf417\encoder\PDF4
17Writer.java:41: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\qrcode\QRCodeWriter
.java:40: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] D:\ZXing-2.0\zxing-2.0\core\src\com\google\zxing\qrcode\QRCodeWriter
.java:47: method does not override a method from its superclass
    [javac]   @Override
    [javac]    ^
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 42 errors

BUILD FAILED
D:\ZXing-2.0\zxing-2.0\core\build.xml:37: Compile failed; see the compiler error
 output for details.

由于

Answer 1

这是Java 5 javac无法解析的Java 6语法。

安装并使用具有Java 6 javac的Java 6 JDK。

（如果你不能这样做，你可以尝试使用Eclipse编译器，它可以使用Java 5 JVM编译Java 6源代码 - http://help.eclipse.org/indigo/topic/org.eclipse.jdt.doc.user/tasks/task-ant_javac_adapter.htm - 你还需要下载适当版本的ecj.jar）

Answer 2

您必须使用javac版本6，其中包含选项-source 6和-target 5！另请参阅this question。

更新：删除使用-source版本6

的javac选项

> javac -version
javac 1.6.0_22
> javac -target 5 ...

Answer 3

它适用于zxing-2.1。我做了以下更改：

的build.xml：

<target name="build" depends="init">
  <mkdir dir="build"/>
  <javac srcdir="src"
     destdir="build"
     source="5"
     target="5"

的pom.xml

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <version>2.4</version>
  <configuration>
    <source>5</source>
    <target>5</target>
  </configuration>
</plugin>

并且能够编译（mvn clean package）core＆amp;没有问题的javase。

Zxing用Java 1.5编译了2.0

3 个答案:

Zxing用J​​ava 1.5编译了2.0

3 个答案:

Zxing用Java 1.5编译了2.0