package util.function;

import java.math.BigInteger;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.regex.Pattern;

import java.util.stream.Stream;

/**

* Created by chenxun.

* Date: 2020/10/2 上午12:05

* Description:

*/

public class TCreateStream {

public static void main(String[] args) {

// 1、使用数组

String[] arr = { "ma", "zhi", "chu", "is", "java", "developer", "family" };

Stream<String> stream = Stream.of(arr);

System.out.println(Arrays.toString(stream.toArray(String[]::new)));

String[] stringArr = {"ma", "zhi", "chu", "love"};

Stream<String> stream1 = Arrays.stream(stringArr);

System.out.println(Arrays.toString(stream1.toArray(String[]::new)));

// 2、使用Collections

List<String> list = new ArrayList<String>();

list.add("ma");

list.add("zhi");

list.add("chu");

Stream<String> stream2 = list.stream();

stream2.forEach(l->{

System.out.println(l);

});

// 3、使用Stream.generate()

Stream<String> stream3 = Stream.generate(() -> "love").limit(10);

String[] strArr3 = stream3.toArray(String[]::new);

System.out.println(Arrays.toString(strArr3));

// 4、使用Stream.iterate()

Stream<BigInteger> bigIntStream = Stream.iterate(BigInteger.ZERO, n -> n.add(BigInteger.ONE)).limit(10);

BigInteger[] bigIntArr = bigIntStream.toArray(BigInteger[]::new);

System.out.println(Arrays.toString(bigIntArr));

// 5、使用Popular APIs

String sentence = "ma zhi chu is a Java wechat official account.";

Stream<String> wordStream = Pattern.compile("\\W").splitAsStream(sentence);

String[] wordArr = wordStream.toArray(String[]::new);

System.out.println(Arrays.toString(wordArr));

}

}