package com.qf.day13
import java.util.Collection
import java.util.HashMap
import java.util.Iterator
import java.util.Map
import java.util.Map.Entry
import java.util.Set
public class work9 {
public static void main(String[] args) {
Map<String, Object> map=new HashMap<>()
for(int i=0
map.put(""+i, i)
}
System.out.println("用Map的内部类Entry,来遍历Map集合")
Set<Entry<String, Object>> entrySet = map.entrySet()
for(Entry<String,Object> entry:entrySet){
System.out.println(entry.getKey()+"-"+entry.getValue())
}
System.out.println("利用迭代器,遍历Map集合")
Iterator<String> iterator=map.keySet().iterator()
while(iterator.hasNext()){
String id=iterator.next()
System.out.println(id+"-"+map.get(id))
}
System.out.println("遍历values")
Collection<Object> collection=map.values()
for(Object object:collection){
System.out.println(object)
}
}
}