How input parameter in String?
<p>I want put value of a at <code>{0}</code>. With C#, I code as: </p>

<pre><code>String a="123"
String b="Xin chao: {0}, ban the nao";
String c=String.Format(b,a);
</code></pre>

<p>But in Java I don't know. Can you help me?</p>
