方法一:用KeySet()方法取出键的集合,遍历取值
HashMap map=new HashMap<String,String>();
map.put("1",a);
map.put("2","b");
Set(String) set=map.keySet();
for(Iterator it=set.iterator(),it.hasNext()){
String number=it.next();
System.out.println(map.get(number));
}
方法二:entrySet取出实体的集合,该实体为键和值的组合实体
Set<Map.Entry<String ,String>> set1=map.entrySet();
Iterator iter=set1.iterator();
while(iter.hasNext()){
Entry<String ,String> entry=iter.next();
System.out.println(entry.getvalue());
}
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