public static void main(String[] args){
 Map<String,String> map=new HashMap<String,String>();
 map.put("1","张三");
 map.put("2","李四");
 map.put("3","王五");
 } 

for(String key:map.keySet()){
 System.out.print("key="+key);
 System.out.println("value="+map.get(key));
 }

Iterator<Map.Entry<String,String>> car =map.entrySet().interator();
 while(car.hasNext()){
 Map.Entry<String,String> entry=car.next();
 System.out.println("key="+entry.getKey()+"and value="+entry.getValue());
 
 }

for(Map.Entry<String,String> entry:map.entrySet()){
 System.out.println("key="+entry.getKey()+"and value="+entry.getValue());

}

for(String val:map.Values()){
 System.out.println("value="+v);

}