java字符串的合并

答：import java.util.*;

class test
{
public static void main(string[] args)
{
string str1="001,002,003,004,006",str2 = "001,002,005";
string str="";
treeset ts = new treeset();

stringtokenizer st = new stringtokenizer(str1,",");
while (st.hasmoretokens())
{
ts.add(st.nexttoken());
}

st = new stringtokenizer(str2,",");
while (st.hasmoretokens())
{
ts.add(st.nexttoken());
}

iterator it = ts.iterator();

while(it.hasnext())
str=str+it.next()+",";

system.out.println(str);
}
}