How to Consistently Round Up to Two Decimal Places in Java?

How to Round Up to Two Decimal Places in Java?

This question has been discussed extensively on StackOverflow. However, many of the proposed solutions have proven ineffective. This article presents a solution that consistently rounds values up to two decimal places.

The conventional approach of using Math.round() is insufficient, as it truncates the number rather than rounding it up. To overcome this, the code should be modified as follows:

double a = 123.13698;
double roundOff = Math.round(a * 100.0) / 100.0;

System.out.println(roundOff);

This solution utilizes type casting to convert the integer result of Math.round() to a double. As a result, the final value is rounded up to two decimal places, as desired. An alternative approach is:

double roundOff = (double) Math.round(a * 100) / 100;

Both methods produce the desired output of 123.14. It's important to note that both input and output must be doubles for the rounding to function correctly.

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