java 根据类名示例化类

MathContext类的getRoundingMode()方法 (MathContext Class getRoundingMode() method)

• getRoundingMode() method is available in java.math package.

  getRoundingMode()方法在java.math包中可用。

• getRoundingMode() method is used to get the RoundingMode value of this MathContext if defined and there are many constants of Rounding Mode like DOWN, CEILING, UNNECESSARY, FLOOR, etc.

  如果已定义，则getRoundingMode()方法用于获取此MathContext的RoundingMode值，并且舍入模式有许多常量，如DOWN，CEILING，UNNECESSARY，FLOOR等。

• getRoundingMode() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  getRoundingMode()方法是一种非静态方法，仅可通过类对象访问，如果尝试使用类名访问该方法，则会收到错误消息。

• getRoundingMode() method does not throw an exception at the time of getting round mode.

  在获取回合模式时， getRoundingMode()方法不会引发异常。

Syntax:

句法：

    public RoundingMode getRoundingMode();

Parameter(s):

参数：

• None

  没有

Return value:

返回值：

The return type of this method is RoundingMode, it returns the RoundingMode constants whatever be defined with this MathContext.

此方法的返回类型为RoundingMode ，无论此MathContext定义什么，它都会返回RoundingMode常量。

Example:

例：

// Java program to demonstrate the example
// of RoundingMode getRoundingMode() method of MathContext
import java.math.*;
public class GetRoundingModeOfMC {public static void main(String args[]) {// Initialize three MathContext objects
MathContext ma_co1 = new MathContext(3, RoundingMode.CEILING);
MathContext ma_co2 = new MathContext(4);
MathContext ma_co3 = new MathContext(6, RoundingMode.FLOOR);
// returns the rounding mode of this MathContext
// ma_co1 i.e. RoundingMode is the second
// parameter set in MathContext Constructor
// i.e. CEILING in ma_co1
RoundingMode rm = ma_co1.getRoundingMode();
System.out.println("ma_co1.getRoundingMode(): " + rm);
// returns the rounding mode of this MathContext
// ma_co2 i.e. RoundingMode is the second
// parameter set in MathContext Constructor
// i.e. HALF_UP in ma_co2 it the default set
// when we don't use other rounding mode
rm = ma_co2.getRoundingMode();
System.out.println("ma_co2.getRoundingMode(): " + rm);
// returns the rounding mode of this MathContext
// ma_co3 i.e. RoundingMode is the second
// parameter set in MathContext Constructor
// i.e. FLOOR in ma_co1
rm = ma_co3.getRoundingMode();
System.out.println("ma_co3.getRoundingMode(): " + rm);
}
}

Output

输出量

ma_co1.getRoundingMode(): CEILING
ma_co2.getRoundingMode(): HALF_UP
ma_co3.getRoundingMode(): FLOOR

翻译自: https://www.includehelp.com/java/mathcontext-getroundingmode-method-with-example.aspx

java 根据类名示例化类