如何检查包含字符串的数组中是否有另一个字符串数组中的某些单词

Question

I have a input string array (called inputArray_1) of length 3. I have another string array (called keywords) with keywords like so:

 System.out.println("Input 1:");

 for (int i = 0; i < inputArray_1.length; i++)
 {
     inputArray_1[i] = reader.nextLine();
 }


String[] keywords = {"dog", "cat", "monkey", "apple"};

The output of inputArray_1 might look like this:

The dog had many friends.

So I want to check each index of the array, and see if the string's at each index has any of the keywords in it. It doesn't have to include all the keywords just one of them.

So far I have this and it is not giving me the right input.

for(int i = 0; i < inputArray_1.length; i++)
        {

            if(inputArray_1[i].contains(keywords[i]))
            {
                System.out.println("YAY");
            }
            else
                System.out.println("BOO");

        }

Answer 1

Along with everyones solution, If you want to test some java 8 Stream and lambda following is the way you can do it easily

 String[] keywords = {"dog", "cat", "monkey", "apple"};

 Arrays.stream(inputArray_1).forEach(
            input -> {
                if (Arrays.stream(keywords).anyMatch(input::equals)) {
                    System.out.println("YAY");
                } else {
                    System.out.println("BOO");
                }
            });

• First you are taking Stream of your inputArray_1 and iterating it using forEach
• Then each of your input is matched against the keywords array. anyMatch here gives you the boolean value true if it exists and false if it not. You are the simply using that logic to print your outputs

If you feel interest about this cool Java 8 stuff. Dig this Java 8 Stream Tutorial for better understanding how the Stream API and Lambda works. And also this specific tutorial to Check if Array contains a certain value

Answer 2

Assuming that inputArray_1 is a String array that results from splitting on white spaces, you would need some type of inner loop that checks the current String from the input array, against all Strings from the keywords array. So something like:

        String [] inputArray_1 = new String [] {"word3","word2","word3"};
    String [] keywords = new String [] {"word1","word3"};

    outerloop:
    for(int i = 0; i < inputArray_1.length; i++) {

        for (int j = 0; j < keywords.length; j++) {
            if(inputArray_1[i].equals(keywords[j])){
                System.out.println("YAY");
                continue outerloop;
            }               
        }

        System.out.println("BOO");

    }

Answer 3

在第一个循环内的关键字中使用另一个循环来检查关键字列表中的每个元素。

Answer 4

If the inputArray_1 contains sentences(strings with whitespace and > 1 words), you would want to iterate through each keyword to check if the current sentence, or inputArray_1[i] , .contains() that keyword.

But if your inputArray_1 just contains values of single words/no sentences, then you could just have one loop like so.

//This will only work if inputArray_1 contains no sentences, just single words
for(int i = 0; i < inputArray_1 .length; i++)
    {
        if(keywords.contains(inputArray_1[i]))
        {
            System.out.println("YAY");
        }

        else
        {
            System.out.println("BOO");
        }

    }