PurgeStatisticBackend.java 文件源码

@Override
public void writeUTF(String str) throws IOException {
    int utfCount = 0, length = str.length();
    for (int i = 0; i < length; i++) {
        int charValue = str.charAt(i);
        if (charValue > 0 && charValue <= 127) {
            utfCount++;
        } else if (charValue <= 2047) {
            utfCount += 2;
        } else {
            utfCount += 3;
        }
    }
    if (utfCount > 65535) {
        throw new UTFDataFormatException(); //$NON-NLS-1$
    }
    position += utfCount * 2;
}