我的源代码在Java 1.6下编译好，但在java 1.7下没有编译：
addText( indent, NBSP + '»' + NBSP );
编译器抛出以下错误：
<message priority="warn"><![CDATA[C:\Build\Nightly\trunk\server\src\uk\co\stasys\ier\reports\capability\CapabilityReport.java:411: error: unclosed character literal]]></message>
<message priority="warn"><![CDATA[ addText( indent, NBSP + '»' + NBSP );]]></message>
<message priority="warn"><![CDATA[ ^]]></message>
<message priority="warn"><![CDATA[C:\Build\Nightly\trunk\server\src\uk\co\stasys\ier\reports\capability\CapabilityReport.java:411: error: illegal character: \187]]></message>
<message priority="warn"><![CDATA[ addText( indent, NBSP + '»' + NBSP );]]></message>
<message priority="warn"><![CDATA[ ^]]></message>
<message priority="warn"><![CDATA[C:\Build\Nightly\trunk\server\src\uk\co\stasys\ier\reports\capability\CapabilityReport.java:411: error: unclosed character literal]]></message>
<message priority="warn"><![CDATA[ addText( indent, NBSP + '»' + NBSP );]]></message>
<message priority="warn"><![CDATA[ ^]]></message>
它也可以使用java 1.7通过IntelliJ IDEA编译好。