| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 481 of 513 | 6% | 65 of 66 | 1% | 42 | 43 | 95 | 106 | 9 | 10 |
| read(char[], int, int) | | 0% | | 0% | 16 | 16 | 41 | 41 | 1 | 1 |
| loadMore(int) | | 0% | | 0% | 12 | 12 | 29 | 29 | 1 | 1 |
| reportBounds(char[], int, int) | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| reportInvalid(int, int, String) | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| read() | | 0% | | 0% | 3 | 3 | 5 | 5 | 1 | 1 |
| reportUnexpectedEOF(int, int) | | 0% | n/a | 1 | 1 | 2 | 2 | 1 | 1 | |
| close() | | 0% | | 0% | 3 | 3 | 7 | 7 | 1 | 1 |
| freeBuffers() | | 0% | | 0% | 3 | 3 | 6 | 6 | 1 | 1 |
| reportStrangeStream() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| UTF32Reader(IOContext, InputStream, boolean, byte[], int, int, boolean) | | 94% | | 50% | 1 | 2 | 0 | 11 | 0 | 1 |