com.zpf.tool.StabilizerLong Maven / Gradle / Ivy
package com.zpf.tool;
import java.util.Arrays;
public class StabilizerLong {
private final long[] records;
private long lastValue;
public StabilizerLong(int size) {
this(0L, size);
}
public StabilizerLong(long initValue, int size) {
records = new long[size];
lastValue = initValue;
if (initValue != 0L) {
Arrays.fill(records, initValue);
}
}
public long add(long value) {
long size = records.length;
if (size < 2) {
lastValue = value;
return lastValue;
}
long sum = 0L;
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 {
long max = value;
long 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 long getValue() {
return lastValue;
}
}