Ensure JDK5 compatibility. Fixes #392.
diff --git a/README b/README
index 7730548..8f2bf3a 100644
--- a/README
+++ b/README
@@ -12,4 +12,6 @@
jsoup is designed to deal with all varieties of HTML found in the wild; from pristine and validating, to invalid tag-soup; jsoup will create a sensible parse tree.
+jsoup runs on Java 1.5 and up.
+
See http://jsoup.org/ for downloads and documentation.
diff --git a/pom.xml b/pom.xml
index 6388e9a..a5eb85f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -43,6 +43,28 @@
</configuration>
</plugin>
<plugin>
+ <!-- this plugin allows us to ensure Java 5 API compatibility -->
+ <groupId>org.codehaus.mojo</groupId>
+ <artifactId>animal-sniffer-maven-plugin</artifactId>
+ <version>1.9</version>
+ <executions>
+ <execution>
+ <id>animal-sniffer</id>
+ <phase>compile</phase>
+ <goals>
+ <goal>check</goal>
+ </goals>
+ <configuration>
+ <signature>
+ <groupId>org.codehaus.mojo.signature</groupId>
+ <artifactId>java15</artifactId>
+ <version>1.0</version>
+ </signature>
+ </configuration>
+ </execution>
+ </executions>
+ </plugin>
+ <plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.6.1</version>
diff --git a/src/main/java/org/jsoup/helper/DataUtil.java b/src/main/java/org/jsoup/helper/DataUtil.java
index 71b0d40..438e416 100644
--- a/src/main/java/org/jsoup/helper/DataUtil.java
+++ b/src/main/java/org/jsoup/helper/DataUtil.java
@@ -178,7 +178,7 @@
if (m.find()) {
String charset = m.group(1).trim();
charset = charset.replace("charset=", "");
- if (charset.isEmpty()) return null;
+ if (charset.length() == 0) return null;
try {
if (Charset.isSupported(charset)) return charset;
charset = charset.toUpperCase(Locale.ENGLISH);
