如果小数部分只有0，如何去除小数部分？

Question

There is a calculation : Double ret = Double.parseDouble(v.getCible_1()) - Double.parseDouble(v.getRealise_1());

If ret = 68.0 how to get only ret = 68 ?

EDIT : I want to keep decimal part if it is not 0 , for example ret = 68.4 will be ok.

Answer 1

You can write like this.

double doubleValue = 68.1;
    int intValue = (int)doubleValue;

    double minus = doubleValue-intValue;
    if(minus != 0.0){
        System.out.println(doubleValue);
    }
    else{
        System.out.println(intValue);
    }

Answer 2

Use DecimalFormat Class to format numbers.

https://docs.oracle.com/javase/7/docs/api/java/text/DecimalFormat.html

Answer 3

You can convert it to int .. like this

int value = (int) 68.0;

it will give you 68

Answer 4

You can cast it to an int and compare it with the double value. If the comparison results in true then you have to use the converted value or else continue using the double .

Do something like this,

private String getResultValue(double ret) {
    int convertedValue = (int) ret;
    return String.valueOf(ret == convertedValue ? convertedValue : ret);
}

For Example,

• When ret = 68.0, convertedValue = 68 --> Comparison: True , Returned Value: 68

• When ret = 68.4, convertedValue = 68 --> Comparison: False , Returned Value: 68.4