Java Math MathContext.hashCode() 方法 Java Math MathContext.getRoundingMode() 方法 Java Math MathContext.toString() 方法 Java Math MathContext.hashCode() 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(5); mc2 = new MathContext(20, RoundingMode.UNNECESSARY); // create 2 int objects int i1, i2; // assign hashcode of mc1, mc2 to i1, i2 i1 = mc1.hashCode(); i2 = mc2.hashCode(); String str1 = "Hashcode of mc1 is " + i1; String str2 = "Hashcode of mc2 is " + i2; // print i1, i2 values System.out.println( str1 ); System.out.println( str2 ); } } Java Math MathContext.getRoundingMode() 方法 Java Math MathContext.toString() 方法