public class CompareFloatArraysWithTolerance {
/**
Compare two float arrays element-by-element using a tolerance.
Floating‑point values often differ slightly due to rounding,
so two numbers are considered "equal" when their absolute
difference is below the chosen threshold.
*/
// Compares two float arrays and returns true if all elements match within tolerance
public static boolean compareFloatArrays(float[] a, float[] b, float tolerance) {
// If lengths differ, arrays cannot be equal
if (a.length != b.length) {
return false;
}
// Compare each element using absolute difference
for (int i = 0; i < a.length; i++) {
float diff = Math.abs(a[i] - b[i]);
// If any element differs more than tolerance, arrays are not equal
if (diff > tolerance) {
return false;
}
}
// All elements matched within tolerance
return true;
}
// Prints the comparison result
public static void printComparison(boolean result) {
if (result) {
System.out.println("Arrays are equal within tolerance.");
} else {
System.out.println("Arrays differ.");
}
}
public static void main(String[] args) {
// Example arrays
float[] floatArr1 = new float[]{
12314.9872f,
3.14f,
12387.91372f,
8876.579013f
};
float[] floatArr2 = new float[]{
12314.9872f,
3.14f,
12387.91371f,
8876.579013f
};
// Tolerance chosen for comparison
float tolerance = 0.001f;
// Perform comparison
boolean result = compareFloatArrays(floatArr1, floatArr2, tolerance);
// Output result
printComparison(result);
}
}
/*
run:
Arrays are equal within tolerance.
*/
