程序代码：

        java.util.Map<String, String> map1 = new HashMap<String,String>();
        map1.put("qq", "qfjhfhgf");
        map1.put("ww", "wjhmfugf");
        map1.put("ee", "ebncvhfg");
        map1.put("rr", "ruyjt");
        map1.put("tt", "tbjvn");
        map1.put("yy", "yiukfyu");
        
        Set<String> ser = map1.keySet();
        Iterator<String> it = ser.iterator();
        System.out.println("map1的长度是: "+map1.size());
        while(it.hasNext()) {
            String str6 = it.next();
            String str7 = map1.get(str6);
            System.out.println("key="+it.next()+"; value="+map1.get(it.next()));

程序代码：

        while(it.hasNext()) {
            String str6 = it.next();
            String str7 = map1.get(str6);
            System.out.println("key="+str6+"; value="+str7);
        }