Reversing Arrays

Poem.java

/** * Reverse the order of the first count lines in the poem. * * @param count The number of lines to be reversed. */ public void reverse(int count) { // count is in [1..length], map that to [0..length-1] int position = count - 1; // reverse the order of the first position elements for (int index = 0; index <= position / 2; ++index) { String tmp = shuffledPoem[index]; shuffledPoem[index] = shuffledPoem[position - index]; shuffledPoem[position - index] = tmp; } }

This method reverses the order of the first count components of the array shuffledPoem.