【 tulaoshi.com - 编程语言 】
                             
                            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); 
} 
}