我如何每段得到一个句子（随机取的句子）

Question

我有 3 个段落，我试着每段写一个句子。但是，句子是随机的。

除此之外，它总共执行了 2 次迭代。

示例：

String sentences = "i love u. i like u. i get money. \nOther side. 
A new car. white paint. \nSomething else. i see the sky.
i took a money yesterday. ";

有3个段落和9个句子。我想得到这样的输出：

输出：

（P：段落，S = 句子）

第一次迭代：

P0S1 : i like you
P1S0 : Other side
P2S1 : i see the sky

第二次迭代：

P0S2 : i get money
P1S2 : white paint
P2S0 : Something else

上面这句话是随机得到的

我尝试将密钥和它的句子配对，但不知道如何随机获取句子

我的代码：

Map<String,String> mapIndeksKeyAndSentence = new LinkedHashMap<String,String>();

String sentences = "i love u. i like u. i get money. \nOther side. 
A new car. white paint. \nSomething else. i see the sky.
i took a money yesterday. ";

String [] arrSentence = sentence.split("\n");
for(int i=0; i<arrSentence.length; i++){

String[] arrSentenceByDot = arrSentence[i].split("\\. ");
for(int j=0; j<arrSentenceByDot.length; j++){

mapIndeksKeyAndSentence.put(i+""+j, arrSentenceByDot[j]);
}
}

mapIndeksKeyAndSentence 的输出是 ::

the index : 00   //means = paragraph one, sentence one 
the sentence : i love you
.
.
.
etc . . 

那么，我如何通过两次迭代随机获得句子？...请帮助。

Answer 1

尝试：

public static void main(String[] args) {
    String sentences = "i love u. i like u. i get money. \nOther side. A new car. white paint. \nSomething else. i see the sky. i took a money yesterday. ";
    List<String[]> paragraphs = new ArrayList<String[]>();
    for(String s : sentences.split("\n"))
        paragraphs.add(s.split("\\. "));

    int i = 0;
    for(String[] ss : paragraphs) 
        System.out.println("P" + i++ + "S" + getRandom(ss));        
}

public static String getRandom(String[] s) {
    int i = (int) (Math.random() * s.length);
    return s[i];
}

Answer 2

您可以列出所有可能的索引并使用Collections.suffle(...) 对其进行排序。像这样的：

import java.util.Collections;

...
...

List<Integer> indices = new ArrayList<>(arrSentenceByDot.length);

for(int j=0; j<arrSentenceByDot.length; j++){
    indices.add(j);
}

Collections.shuffle(indices);

for(int j=0; j<indices.size(); j++){
    int index = indices.get(j);
    mapIndeksKeyAndSentence.put(i+""+index, arrSentenceByDot[index]);
}