*/
package jalview.util;
+import java.util.Arrays;
+
/**
* DOCUMENT ME!
*
}
/**
- * DOCUMENT ME!
+ * Returns a string consisting of n repeats of character c
*
* @param c
- * DOCUMENT ME!
* @param n
- * DOCUMENT ME!
*
- * @return DOCUMENT ME!
+ * @return
*/
- private static String repeat(char c, int n)
+ static String repeat(char c, int n)
{
if (n <= 0)
{
return "";
}
-
- StringBuffer s = new StringBuffer(n);
-
- for (int i = 0; i < n; i++)
- {
- s.append(c);
- }
-
- return s.toString();
+ char[] chars = new char[n];
+ Arrays.fill(chars, c);
+ return new String(chars);
}
/**
{
return formatString;
}
+
+ /**
+ * Bespoke method to format percentage float value to the specified number of
+ * decimal places. Avoids use of general-purpose format parsers as a
+ * processing hotspot.
+ *
+ * @param sb
+ * @param value
+ * @param dp
+ */
+ public static void appendPercentage(StringBuilder sb, float value, int dp)
+ {
+ /*
+ * rounding first
+ */
+ double d = value;
+ long factor = 1L;
+ for (int i = 0; i < dp; i++)
+ {
+ factor *= 10;
+ }
+ d *= factor;
+ d += 0.5;
+
+ /*
+ * integer part
+ */
+ value = (float) (d / factor);
+ sb.append((long) value);
+
+ /*
+ * decimal places
+ */
+ if (dp > 0)
+ {
+ sb.append(".");
+ while (dp > 0)
+ {
+ value = value - (int) value;
+ value *= 10;
+ sb.append((int) value);
+ dp--;
+ }
+ }
+ }
}