How to put values from array into HashSet?

Question

How to put values from array into HashSet?

Write a test that checks that the rows of the array int [][] no number repeated. With this purpose I want to put string values in HashSet and compare the length of the string and resulting set.
But the compiler does not want to accept an int, and Integer. Prompt how to be?

Java

edmund24 asked April 19th 20 at 12:24

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More answers about "How to put values from array into HashSet?"

2 answers

Alysha.Hegma answered on April 19th 20 at 12:28

in the collection you cannot put primitives.

Ozella91 answered on · Accepted Answer · 2020-04-19T10:26:53.339Z

Probably you use the wrong type HashSet, that is different from Integer. For example, here it will be all OK:

public static void main(String args[])
{
 int[][] array = {{1, 5}, {1, 3}, {7, 8}};
 HashSet<Integer> yourHashSet = new HashSet<Integer>();

yourHashSet.add(array[0][0]);
yourHashSet.add(array[1][0]);
yourHashSet.add(array[2][0]);

 for (int i : yourHashSet)
System.out.println(i);
 }