Editing Java syntax (section)

====<code>try</code>-with-resources statements====

<code>try</code>-with-resources statements are a special type of <code>try-catch-finally</code> statements introduced as an implementation of the [[dispose pattern]] in Java SE 7. In a <code>try</code>-with-resources statement the <code>try</code> keyword is followed by initialization of one or more resources that are released automatically when the <code>try</code> block execution is finished. Resources must implement <code>java.lang.AutoCloseable</code>. <code>try</code>-with-resources statements are not required to have a <code>catch</code> or <code>finally</code> block unlike normal <code>try-catch-finally</code> statements.

<syntaxhighlight lang="java">
try (FileOutputStream fos = new FileOutputStream("filename");
    XMLEncoder xEnc = new XMLEncoder(fos)) {
    xEnc.writeObject(object);
} catch (IOException ex) {
    Logger.getLogger(Serializer.class.getName()).log(Level.SEVERE, null, ex);
}
</syntaxhighlight>

Since Java 9 it is possible to use already declared variables:

<syntaxhighlight lang="java">
FileOutputStream fos = new FileOutputStream("filename");
XMLEncoder xEnc = new XMLEncoder(fos);
try (fos; xEnc) {
    xEnc.writeObject(object);
} catch (IOException ex) {
    Logger.getLogger(Serializer.class.getName()).log(Level.SEVERE, null, ex);
}
</syntaxhighlight>