如何使用HashMap!

Question

//import java.util.*;
StringBuffer sb=new StringBuffer("(");
      HashMap hmpConition=new HashMap();
      hmpConition.put("1","1");
      hmpConition.put("2","1");
for (Iterator it=hmpConition.keySet().iterator(); it.hasNext(); )
  sb.append("'"+(String)it.next()+"',");
 String rs=sb.substring(0,sb.length()-1);
rs+=")";
System.out.println(rs);

Answer 1

HashMap hmpCondition=new HashMap();            Iterator itors=hmpCondition.keySet().iterator();
            String inStr="";
            while(itors.hasNext()){
               String key=(String)itors.next(); 
                
               if(!"".equals(inStr)){
                   inStr +=",";
               }
                inStr +="'"+key+"'";
            }
            inStr= "("+inStr+")";其实像你这样的应用，用ArrayList就可以了，因为你只要key而不需要value啊