Sha256: 976efe78e3b69660f89ecadcaf35fcfd5c4a776c155f69eb45855926fc9515ee
Contents?: true
Size: 1.23 KB
Versions: 216
Compression:
Stored size: 1.23 KB
Contents
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
final class DiamondPrinter {
private static final int A_INT = (int) 'A';
private static String blank(final int length) {
return String.join("", Collections.nCopies(length, " "));
}
private static String reverse(final String string) {
return new StringBuilder(string).reverse().toString();
}
List<String> printToList(final char chr) {
final int nRows = 2 * ((int) chr - A_INT) + 1;
final List<String> result = new ArrayList<>();
// Populate the top rows.
for (int nRow = 0; nRow < (nRows + 1) / 2; nRow++) {
final char rowChr = (char) (A_INT + nRow);
final String leftHalfOfRow = blank((nRows - 1) / 2 - nRow) + rowChr + blank(nRow);
final String rightHalfOfRow = reverse(leftHalfOfRow.substring(0, leftHalfOfRow.length() - 1));
final String fullRow = leftHalfOfRow + rightHalfOfRow;
result.add(fullRow);
}
// Populate the bottom rows by 'reflecting' the top rows.
for (int nRow = (nRows - 1) / 2 - 1; nRow >= 0; nRow--) {
result.add(result.get(nRow));
}
return result;
}
}
Version data entries
216 entries across 216 versions & 1 rubygems