import java.util.HashMap;
import java.util.Map;
import java.util.Set;
public class MapDemo {
public static void main(String args[]){
Map<String,String> map = new HashMap<String,String>();
map.put("1","张三");
map.put("2","李四");
map.put("3","王五");
//keySet()遍历
/*Set<String> keys = map.keySet();
for (String key:keys) {
String value = map.get(key);
System.out.println(key+" "+value);
}*/
//entrySet()遍历
Set<Map.Entry<String,String>> entrys = map.entrySet();
for (Map.Entry<String,String> entry:entrys) {
String key = entry.getKey();
String value = entry.getValue();
System.out.println(key+" "+value);
}
}}
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