com.zpf.tool.StabilizerDouble Maven / Gradle / Ivy
package com.zpf.tool;
import java.util.Arrays;
public class StabilizerDouble {
private final double[] records;
private double lastValue;
public StabilizerDouble(int size) {
this(0f, size);
}
public StabilizerDouble(double initValue, int size) {
records = new double[size];
lastValue = initValue;
if (initValue != 0.0) {
Arrays.fill(records, initValue);
}
}
public double add(double value) {
int size = records.length;
if (size < 2) {
lastValue = value;
return lastValue;
}
double sum = 0f;
if (size < 5) {
for (int i = 0; i < size; i++) {
if (i == records.length - 1) {
records[i] = value;
} else {
records[i] = records[i + 1];
}
sum = sum + records[i];
}
lastValue = sum / size;
} else {
double max = value;
double min = value;
for (int i = 0; i < size; i++) {
if (i == records.length - 1) {
records[i] = value;
} else {
records[i] = records[i + 1];
}
sum = sum + records[i];
if (records[i] > max) {
max = records[i];
}
if (records[i] < min) {
min = records[i];
}
}
sum = sum - max - min;
lastValue = sum / (size - 2);
}
return lastValue;
}
public double getValue() {
return lastValue;
}
}