Java Math MathContext.getRoundingMode() 方法 Java Math MathContext.getPrecision() 方法 Java Math MathContext.hashCode() 方法 Java Math MathContext.getRoundingMode() 方法 package com.codingdict; import java.math.*; public class MathContextDemo { public static void main(String[] args) { // create 2 MathContext objects MathContext mc1, mc2; // assign context settings to mc1, mc2 mc1 = new MathContext(4); mc2 = new MathContext(50, RoundingMode.CEILING); // create 2 RoundingMode objects RoundingMode rm1, rm2; // assign roundingmode of mc1, mc2 to rm1, rm2 rm1 = mc1.getRoundingMode(); rm2 = mc2.getRoundingMode(); String str1 = "Rounding Mode of mc1 is " + rm1; String str2 = "Rounding Mode of mc2 is " + rm2; // print rm1, rm2 values System.out.println( str1 ); System.out.println( str2 ); } } Java Math MathContext.getPrecision() 方法 Java Math MathContext.hashCode() 方法