크로스 플랫폼 Java 애플리케이션에서 시스템 정보(메모리, 디스크 사용량)를 어떻게 검색할 수 있습니까?

// Total number of processors or cores available to the JVM
System.out.println("Available processors (cores): " + Runtime.getRuntime().availableProcessors());

// Total amount of free memory available to the JVM
System.out.println("Free memory (bytes): " + Runtime.getRuntime().freeMemory());

// Maximum amount of memory the JVM will attempt to use
long maxMemory = Runtime.getRuntime().maxMemory();
System.out.println("Maximum memory (bytes): " + (maxMemory == Long.MAX_VALUE ? "no limit" : maxMemory));

// Total memory currently available to the JVM
System.out.println("Total memory available to JVM (bytes): " + Runtime.getRuntime().totalMemory());

// Get a list of all filesystem roots on this system
File[] roots = File.listRoots();

// For each filesystem root, print some info
for (File root : roots) {
  System.out.println("File system root: " + root.getAbsolutePath());
  System.out.println("Total space (bytes): " + root.getTotalSpace());
  System.out.println("Free space (bytes): " + root.getFreeSpace());
  System.out.println("Usable space (bytes): " + root.getUsableSpace());
}