/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
import java.util.Arrays;
import java.util.Set;
import java.util.stream.IntStream;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
        Set < Integer > set = Set.of( 1 , 2 , 3 );
        IntStream intStream = set.stream().mapToInt( Integer :: intValue );
        int[] arrayOfInts = intStream.map( integer -> Math.multiplyExact( integer , integer ) ).sorted().toArray();
 
        System.out.println( "arrayOfInts = " + Arrays.toString( arrayOfInts ) );
	}
}

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