30.12.2021
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4comments

Explain me please

Question about the task

Under discussion

I should return String[] from method. I return it, but main method should return

{"java", "util", "stream"}

. Why it returns

[java, util, stream];

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Guadalupe Gagnon

Level 37 , Tampa, United States

30 December 2021, 20:02

The Arrays.toString() does not output quotation marks around Strings. The problem with your code is that in the case that there are more than 6 tokens it should return no more than an array of the first 6, not and array of the first 6 and null for the rest of the indices. Take for example: "java.util.stream.java.util.stream.java.util.stream" This should return: [java, util, stream, java, util, stream] and not: [java, util, stream, java, util, stream, null, null, null]

Константин Савченко

Level 25 , Ukraine, Ukraine

30 December 2021, 22:21

My solution return array with length <= 6

Guadalupe Gagnon

Level 37 , Tampa, United States

30 December 2021, 23:47

not true. Run it with:

public static void main(String[] args) {
   String packagePath = "java.util.stream.java.util.stream.java.util.stream";
   String[] tokens = getTokens(packagePath, "\\.");
   System.out.println(Arrays.toString(tokens));
}

It outputs: [java, util, stream, java, util, stream, null, null, null] which is incorrect.

Константин Савченко

Level 25 , Ukraine, Ukraine

3 January, 23:27

You were right, but after I sent that decision, it’s still wrong

public static String[] getTokens(String query, String delimiter) {
    //write your code here
    StringTokenizer tokenizer = new StringTokenizer(query, delimiter);
    int i = 0;
    String[] array = new String[Math.min(tokenizer.countTokens(), 6)];

    while (i < array.length) {
        array[i] = tokenizer.nextToken();
        i++;
    }

    return array;
}