19-6 / 24 Job: a double fractional number, rounding to two decimal places according to

☞ requirements

The type of a double decimals, rounded to two decimal places in accordance with

 

☞ implementation

1. Obtain a fractional type double

2. BigDecimal package operates setScale

3. The output

☞ Code Content

 

Circulation Package; 



/ ** 
* @author 9527 
* / 

// import scanned packages 
Import java.util.Scanner; 
// Import fractional packet 
Import java.math.BigDecimal; 


public class a Decimal { 
    static Scanner Scanner new new SC = (the System. in); 

    public static void main (String [] args) { 
        // prompted to enter a decimal 
        System.out.println ( "Please enter a decimal number, at least three to one decimal place:"); 
        // receiving a decimal 
        double decimal sc.nextDouble = (); 
        the BigDecimal the BigDecimal BD new new = (decimal); 
        BD = bd.setScale (2, BigDecimal.ROUND_HALF_UP); 
        System.out.println ( "outputting rounded to two decimal places:" + BD); 
    } 

}

 

☞ operating results

 

 

 

☞ problems in the implementation process

 Groping for a long time or not using the API to solve the problem, you need to learn the skills API query