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Various functions for performing general functions

There is a newer version: 1.20.0

/*
 * The MIT License
 *
 * Copyright 2020 Takashi Harano
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.libutil;

/**
 * The class HeapInfo represents the heap usage of the Java VM.
 */
public class HeapInfo {

  private long total;
  private long used;
  private long free;
  private long max;
  private double usage;
  private String percent;

  public HeapInfo() {
    Runtime runtime = Runtime.getRuntime();
    this.total = runtime.totalMemory();
    this.free = runtime.freeMemory();
    this.max = runtime.maxMemory();
    this.used = total - free;
    this.usage = ((double) used / total) * 100;
    this.percent = String.format("%.1f", usage);
  }

  public long getTotal() {
    return total;
  }

  public long getUsed() {
    return used;
  }

  public long getFree() {
    return free;
  }

  public long getMax() {
    return max;
  }

  public double getUsage() {
    return usage;
  }

  public String getPercent() {
    return percent;
  }

}