请问一下String.valueOf问题

[stoneopen1]

public void initArray()
{
ResultArray ra = new ResultArray();
ra.open();
String strSql = String.valueOf(String.valueOf((new StringBuffer("select name,name from type_cityarea where agentno = '")).append(strAgentNo).append("'")));
arrCityArea = ra.getList(strSql);
strSql = String.valueOf(String.valueOf((new StringBuffer("select name,name from type_contact where agentno = '")).append(strAgentNo).append("'")));
arrContactType = ra.getList(strSql);
strSql = String.valueOf(String.valueOf((new StringBuffer("select prop.rs_guid,prop.property_name from usr_con_pro as prop where prop.agen" +
"tno = '"
)).append(strAgentNo).append("'")));
arrOther = ra.getList(strSql);
ra.close();
}



请问一下这句怎么理解啊String.valueOf(String.valueOf((new StringBuffer
为什么要用两个String.valueOf,String.valueOf是什么意思啊，

[老土豆T]

public StringBuffer(String str)
Constructs a string buffer so that it represents the same sequence of characters as the string argument; in other words, the initial contents of the string buffer is a copy of the argument string. The initial capacity of the string buffer is 16 plus the length of the string argument.

===============================================

public static String valueOf(char[] data)
Returns the string representation of the char array argument. The contents of the character array are copied; subsequent modification of the character array does not affect the newly created string.

Parameters:
data - a char array.
Returns:
a newly allocated string representing the same sequence of characters contained in the character array argument.
========================================================

[stoneopen1]

谢谢拉，可是英语不怎么看的懂，不怎么好理解，能够通俗一点吗