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function void listCodePoint(String aString)
{
int codePointNum = aString.codePointCount(0,aString.length() - 1);
int i = 0;
while (i <= codePointNum)
{
int index = aString.offsetByCodePoint(0,i);
int cp = aString.codePointAt(index);
if (Charater.isSupplementaryCodePoint(cp))
i += 2;
else
i++;
}
}