如何将数组中的 2 个单词添加到另一个数组中的字符串

Question

I am writing a mad lib program for school. The program must have 30 sentences, with two words from each sentence missing. I planned to store the sentences in an array, user-inputted words in a second array, and then add words from the word array to the sentences in the sentence array. When using for loops to do this, it works for the first sentence, but in every sentence after that the the same words are used.

Here's the code I have for this part:

String story[] = {"Once upon a time, there was a _ man named _.", "He loved playing _ on _ afternoons."};

String words[] = {"awesome", "James", "checkers", "Sunday"};

for (int i = 0; i < story.length; i++) { 
    for (int j = 0; j < words.length; j++) { 
        story[i] = story[i].replaceFirst(placeholder, words[j]); // placeholder is set to '_'
    }
System.out.println(story[i]); 
}

Answer 1

for (int i = 0; i < story.length; i++) { for (int j = i 2; j < (i 2)+1; j++) { story[i] = story[i].replaceFirst(placeholder, words[j]); // placeholder is set to '_' } System.out.println(story[i]); }

i guess this would work if you really wanna solve it this way

Answer 2

This should work

    String story[] = {"Once upon a time, there was a _ man named _.", "He loved playing _ on _ afternoons."};
    String words[] = {"awesome", "James", "checkers", "Sunday"};
    int j=0;
    for (int i = 0; i < story.length; i++) {
        while(story[i].contains("_")){
            story[i] = story[i].replaceFirst("_", words[j++]);
        }
        System.out.println(story[i]);
    }

Answer 3

According to your case the words array will contain x2 elements more than story array. We can use that to write a simple algorithm:

String story[] = {"Once upon a time, there was a _ man named _.", "He loved playing _ on _ afternoons."};
String words[] = {"awesome", "James", "checkers", "Sunday"};
String placeholder = "_";
for (int i = 0; i < story.length; i++) {
    String word1 = words[i * 2];
    String word2 = words[i * 2 + 1];
    story[i] = story[i]
            .replaceFirst(placeholder, word1)
            .replaceFirst(placeholder, word2);

    System.out.println(story[i]);
}