HashMap遍历所有的key和value

map.entrySet().forEach(entry -> {
    System.out.print(entry.getKey()+"：");
    System.out.println(entry.getValue());
});

map.keySet().forEach(key->{   
    System.out.println(key);  
});                           
map.values().forEach(value->{ 
    System.out.println(value);
});                           

Iterator<Map.Entry<Integer, Integer>> iterator = map.entrySet().iterator();
while (iterator.hasNext()){
    Map.Entry<Integer, Integer> entry = iterator.next();
    System.out.print(entry.getKey()+"：");
    System.out.println(entry.getValue());
}

 map.keySet().forEach(key->{          
     System.out.print(key+"：");       
     System.out.println(map.get(key));
 });  

for (Map.Entry entry : map.entrySet()) {
    System.out.print(entry.getKey() + "：");
    System.out.println(entry.getValue());
}