Java 中将 Map 转换为 Stream 的程序
java 8object oriented programmingprogramming更新于 2025/12/9 0:44:17
首先，创建一个 Map 并设置值 −
Map<Integer, String> map = new HashMap<>(); map.put(1, "Kevin"); map.put(2, "Ryan>); map.put(3, "Nathan"); map.put(4, "Ricky"); map.put(5, "Shane"); map.put(6, "Adam");
现在，将 Map 转换为 Stream −
Stream<Map.Entry<Integer, String> > stream = map.entrySet().stream();
System.out.println("Stream (Map to Stream) = "+ Arrays.toString(stream.toArray()));
示例
以下是 Java 中将 Map 转换为 Stream 的程序 −
import java.util.*;
import java.util.stream.*;
public class Demo {
public static void main(String args[]) {
Map<Integer, String> map = new HashMap<>();
map.put(1, "Kevin");
map.put(2, "Ryan");
map.put(3, "Nathan");
map.put(4, "Ricky");
map.put(5, "Shane");
map.put(6, "Adam");
System.out.println("Map = " + map);
Stream<Map.Entry<Integer, String> > stream = map.entrySet().stream();
System.out.println("Stream (Map to Stream) = "+ Arrays.toString(stream.toArray()));
}
}
输出
Map = {1=Kevin, 2=Ryan, 3=Nathan, 4=Ricky, 5=Shane, 6=Adam}
Stream (Map to Stream) = [1=Kevin, 2=Ryan, 3=Nathan, 4=Ricky, 5=Shane, 6=Adam]
