title: UTF-8 character is not proper in JOptionPane
body: <p>Please find the below sample code, The UTF-8 character properly displaying in  windows machine. But, its not proper for Linux machine (Ubuntu). </p>
  
  <pre><code>import javax.swing.JOptionPane;
  
  public class JContPaneTest 
  {
    public static void main(String[] args) 
    {
      JOptionPane.showMessageDialog(null, "\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3002\u30c7\u30fc\u30bf\u30d9\u30fc", "Error",JOptionPane.ERROR_MESSAGE);
    }
  }
  </code></pre>
  
  <p>Is there any way to solve this problem?</p>