java，

java，

Java中Map遍历的两种方式：
package TestDemo;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

public class TestSub {
public static void main(String[] args) {
Map<String,String> map = new HashMap<String,String>();
map.put("a", "abc");
map.put("b", "bbb");
map.put("c", "ccc");
map.put("d", "ddd");
//1.map遍历的第一种方式：使用Map.entrySet();
Set<Entry<String,String>> set = map.entrySet();
for(Entry<String,String> test : set){
System.out.println(test.getKey()+":"+test.getValue());
}
//2.map遍历的第二种方式：获取keySet,使用Iterator进行遍历
Set<String> key = map.keySet();
Iterator<String> iterator = key.iterator();
String temp = "";
while(iterator.hasNext()){
temp = iterator.next();
System.out.println(temp+":"+map.get(temp));
}
}
}