public static void main(String args[]) { Map<String, Object> map = Maps.newHashMap(); map.put("a","a1"); map.put("b","b1"); map.put("c","c1");
//第一种 for (String key:map.keySet()){ System.out.println(map.get(key)); } Iterator<String> it1 = map.keySet().iterator(); while (it1.hasNext()){ System.out.println( map.get(it1.next())+ "----------it1");; } //第二种 System.out.println("========================="); for (Object s:map.values()){ System.out.println(s + "-------map.values()"); } Iterator<Object> itVa = map.values().iterator(); while (itVa.hasNext()){ System.out.println( itVa.next()+ "----------itVa");; } //第三种 System.out.println("========================="); for (Map.Entry<String, Object> map1:map.entrySet()){ System.out.println(map1.getValue() +"------map.entrySet()"); } Iterator<Map.Entry<String, Object>> it = map.entrySet().iterator(); while(it.hasNext()){ Map.Entry<String, Object> next = it.next(); System.out.println(next.getValue() + "-------map.values()"); }
}
结果:
b1
c1
a1
b1----------it1
c1----------it1
a1----------it1
=========================
b1-------map.values()
c1-------map.values()
a1-------map.values()
b1----------itVa
c1----------itVa
a1----------itVa
=========================
b1------map.entrySet()
c1------map.entrySet()
a1------map.entrySet()
b1-------map.values()
c1-------map.values()
a1-------map.values()