Two decimal places reserved for two integers of Java

in Java, when two integers are divided, because the number after the decimal point is truncated, the result of the operation will be an integer, and if you want to get the result of the operation as a floating point, you must cast both integers one or both to the floating-point numbers.
For example:
(float) A/b///convert one of the integers to a floating-point number and divide it with another integer
A /(float) b

(float) A/(float) b//convert two integers to floating-point numbers at the same time and then divide

float num= (float) 2/3;   DecimalFormat df = new DecimalFormat ("0.00");//Format fractional   string s = Df.format (num);//return String type

Two decimal places reserved for two integers of Java