Method multiplicity

/* Return the number of occurrences of item in the multiset. */

public int multiplicity(int item)

{

if ( item < 0 || item >= maxValue )

throw new RuntimeException(

”item out of range for NatMultiset”

);

else {

int count = 0;

for (int k=0; k < maxValue; k++)

if ( list[k]==item )

count++;

return count;

}

}

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