------------------------ MathContext | ------------------------ # Ö÷ÒªµÄ×÷ÓÃÊÇ´¦ÀíÔËËã¹ý³ÌÖÐµÄ¾«¶ÈÎÊÌâ # ¾²Ì¬±äÁ¿ MathContext UNLIMITED = new MathContext(0, RoundingMode.HALF_UP) * ²»ÏÞÖÆ³¤¶È, Ê¹ÓÃËÄÉáÎåÈëµÄ·½Ê½À´ÉáÈëÐ¡Êý MathContext DECIMAL32 = new MathContext(7, RoundingMode.HALF_EVEN) MathContext DECIMAL64 = new MathContext(16, RoundingMode.HALF_EVEN) MathContext DECIMAL128 = new MathContext(34, RoundingMode.HALF_EVEN) # ¹¹Ôì·½·¨ MathContext(int setPrecision) MathContext(int setPrecision,RoundingMode setRoundingMode) MathContext(String val) setPrecision * ¾«¶È,Ò»¹²×î³¤×îÉÙ³¤¶È(°üº¬Ð¡Êý) setRoundingMode * ÉáÈëÄ£Ê½ # ÊµÀý·½·¨ int getPrecision() RoundingMode getRoundingMode()