| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 304 of 501 | 39% | 44 of 62 | 29% | 34 | 41 | 59 | 103 | 7 | 10 |
| loadMore(int) | | 0% | | 0% | 12 | 12 | 29 | 29 | 1 | 1 |
| read(char[], int, int) | | 67% | | 57% | 10 | 15 | 9 | 40 | 0 | 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 | |
| freeBuffers() | | 0% | | 0% | 3 | 3 | 6 | 6 | 1 | 1 |
| close() | | 46% | | 50% | 1 | 2 | 3 | 6 | 0 | 1 |
| reportStrangeStream() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| UTF32Reader(IOContext, InputStream, byte[], int, int, boolean) | | 93% | | 50% | 1 | 2 | 0 | 10 | 0 | 1 |