division

This question already has an answer here: Double value returns 0 [duplicate] 3 answers The function below gets two values from sharedpreferences, weight and height, and I use these to calculate the BMI, When I print the content of the values I get the values i have entered in the sharedprefs ( which is good) but then when i run a division operation on them, I always get 0 as a result.. Where is the error? public int computeBMI(){ SharedPreferences customSharedPreference = getSharedPreferences( "myCustomSharedPrefs", Activity.MODE_PRIVATE); String Height = customSharedPreference.getString(

I'm trying this simple calculation in a Java application: System.out.println("b=" + (1 - 7 / 10)); Obviously I expect the output to be b=0.3 , but I actually get b=1 instead. What?! Why does this happen? If I write: System.out.println("b=" + (1 - 0.7)); I get the right result, which is b=0.3 . What's going wrong here? You're using integer division. Try 7.0/10 instead. You've used integers in the expression 7/10, and integer 7 divided by integer 10 is zero. What you're expecting is floating point division. Any of the following would evaluate the way you expected: 7.0 / 10 7 / 10.0 7.0 / 10.0 7

I have a very simple division in Java (it's a product quantity / production per hour), however whenever I make this division I get strange errors: float res = quantity / standard; I have tried the above division with several values and I always get errors, however the one that I've tried everywhere else and gotten right was this: Everywhere in the world: 13.6 = 6800 / 500; Java: 13.0 = 6800 / 500; I've researched BigDecimal and BigInteger, however I haven't found a way to create this division with them, is there any other way to do this division in Java without having precision errors?? Any