public static void main(String[] args) {
Map<String ,Object > map=new HashMap<String, Object>();
map.put("1","张三");
map.put("2","lisi");
map.put("3","wangwu");
map.put("4","maliu");
map.put("5","hanmeiemi");
map.put("6","kaai");
//打印对象
System.out.println(map.entrySet());
//打印key对应的值
for(Object entry:map.values()){
System.out.println(entry);
}
//打印key值
for(String entry:map.keySet()){
System.out.println(entry);
}
//增强型for循环key---value
for(Map.Entry<String , Object > entry:map.entrySet()){
System.out.println(entry.getKey()+"--------"+entry.getValue());
System.out.println(entry.getValue());
}
//使用迭代器遍历map集合
Iterator<Map.Entry<String, Object >> iterator= map.entrySet().iterator();
while (iterator.hasNext()) {
//打印的是所有的对象
System.out.println(iterator.next());
//将对象放在一个集合中
Entry<String ,Object> entry=iterator.next();
System.out.println(entry.getKey());
System.out.println(entry.getValue());
}
}
遍历集合map集合的几种方法
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转载自blog.csdn.net/null111666/article/details/87930201
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