package test;
import com.google.common.collect.Maps;
import java.util.Map;
public class TestTime {
public static void main(String[] args) {
// 创建一个Map
Map<String, Object> map = Maps.newHashMap();
map.put("name", "张三");
map.put("age", 11);
map.put("sex", "男");
// 传统的Map迭代方式一
for (Map.Entry<String, Object> entry : map.entrySet()) {
System.out.println(entry.getKey() + ":" + entry.getValue());
}
// 传统的Map迭代方式二:先取键,然后循环键
String[] keys = map.keySet().toArray(new String[0]);
for (String key : keys) {
Object value = map.get(key);
System.out.println(value);
}
// JDK8的迭代方式
map.forEach((key, value) -> {
System.out.println(key + ":" + value);
});
}
}