Double data reserved Two decimal places 1:5 six in

1  Packagecom;2 3  Public classT2 {4 5      Public Static voidMain (string[] args) {6 7System.out.println (Calculateprofit (0.233));8System.out.println (Calculateprofit (0.235));9System.out.println (Calculateprofit (0.237));TenSystem.out.println (Calculateprofit (0.2)); One  A     } -  -     /** the * Keep double type decimal after two bits, not rounded, directly take decimal after two bits such as: 10.1269 return: 10.12 -      *  -      * @paramDoublevalue -      * @return +      */ -      Public StaticString Calculateprofit (Doubledoublevalue) { +         //Keep 2 decimal places AJava.text.DecimalFormat DF =NewJava.text.DecimalFormat ("0.00"); atString result =Df.format (doublevalue); -         returnresult; -     } -  -}

Operation Result:

0.23
0.23
0.24
0.20

Other:

1: actually what I want to do is to round up, but after running the discovery unexpectedly is five to six into, if you have a good way to comment area tell me.

2:decimalformat for this type of hair:
DecimalFormat This type of formatted number is returned after the string, with the # number format, the number of bits is not enough when the 0, with 0 format the number of bits is not enough time to fill 0.

 

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Double data reserved Two decimal places 1:5 six in