Unicode Code Points

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JDK 5.0 supports Unicode 4.0, in which the "supplementary" characters are encoded with two consecutive char values.

5.0	1.4
int cp = string.codePointAt(i)	char cp = string.charAt(i)
if (Character.isSupplementaryCharacter(cp)) ...	omit there are no supplementary characters prior to JDK 5.0

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