how to perform character concatenation in java : <pre><code>String st="java is awesome";
   char[] ch=st.toCharArray();
    st="";
    for(int i=0;i&lt;ch.length;i++)
    {
        if(ch[i]!='a')
            st=st+ch[i];
        else if(ch[i]=='a')
            st=st+ch[i]+'#';
    }
    System.out.println(st);
</code></pre>

<p>i have to perform character concatenation without using '+'.Is it possible?</p>
