| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 117 of 186 | 37% | 16 of 20 | 20% | 17 | 21 | 23 | 38 | 7 | 11 |
| append(CharSequence, int, int) | | 0% | | 0% | 4 | 4 | 8 | 8 | 1 | 1 |
| charAt(int) | | 0% | | 0% | 3 | 3 | 3 | 3 | 1 | 1 |
| append(CharSequence) | | 0% | | 0% | 2 | 2 | 3 | 3 | 1 | 1 |
| append(String) | | 76% | | 50% | 2 | 3 | 2 | 8 | 0 | 1 |
| append(char) | | 79% | | 50% | 1 | 2 | 1 | 4 | 0 | 1 |
| StringBuilder2(int) | | 70% | | 50% | 1 | 2 | 1 | 6 | 0 | 1 |
| append(int) | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| clear() | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| capacity() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| length() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| toString() | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 |