title: "IllegalArgumentException: UNMAPPABLE[1]" while zipping a file with Greek characters
body: <p>I want to zip a file on Windows (7) with <code>ZipOutputStream</code>. The Problem is that the file name (and file file Content too) contains also Greek characters ("<code>ГП0000660040140521_a.txt</code>", Gamma and Pi). The code to zip the file I use:</p>
  
  <pre><code>ZipOutputStream zipOs = new ZipOutputStream(
      new FileOutputStream("c:\\temp\\test.zip"), Charset.forName("cp737")
  );
  
  File sourceFile = new File("C:/Path/To/File/ГП0000660040140521_b.txt");
  String entryName = sourceFile.getName().replaceAll("\\\\", "/");
  ZipEntry entry = new ZipEntry(entryName);
  zipOs.putNextEntry(entry);
  ...
  ...
  </code></pre>
  
  <p>But on the last line (the <code>putNextEntry</code> call) I get a <code>IllegalArgumentException</code>:</p>
  
  <pre><code>java.lang.IllegalArgumentException: UNMAPPABLE[1]
  at java.util.zip.ZipCoder.getBytes(ZipCoder.java:95)
  at java.util.zip.ZipOutputStream.writeLOC(ZipOutputStream.java:407)
  at java.util.zip.ZipOutputStream.putNextEntry(ZipOutputStream.java:221)
  </code></pre>
  
  <p>I assume there must be anything wrong with the character mapping between Greek and UTF-8 ... Whats the right way to zip a file with Greek characters in the file Name?</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>If I use "utf-8" as character set the zip file can be created, but the name of the zipped file is wrong: "<code>ðôðƒ0000660040140521_a.txt</code>" (the Greek characters are missing)</p>