File size: 707 Bytes
0284885 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | package Stream_initial_package;
import java.util.HashMap;
public class Stream_demo3 {
public static void main(String[] args) {
//双列集合 无法直接使用Stream流
//1、创建双列集合
HashMap<String, Integer> hm = new HashMap<>();
//2、添加数据
hm.put("aaa", 111);
hm.put("bbb", 222);
hm.put("ccc", 333);
hm.put("ddd", 444);
//3、第一种获取stream流
hm.keySet().stream().forEach(s -> System.out.print(s + " "));
System.out.println();
//4、第二种获取stream流
hm.entrySet().stream().forEach(s -> System.out.print(s + " "));
System.out.println();
}
}
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