package concurrent.runtime.info;

import java.io.File;

public class CSystem {

	public static void main(String[] args) {
		/* 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());

	    /* This will return Long.MAX_VALUE if there is no preset limit */
	    long maxMemory = Runtime.getRuntime().maxMemory();
	    /* Maximum amount of memory the JVM will attempt to use */
	    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());

	    System.out.println("OS-Name: " + System.getProperty("os.name"));

	    System.out.println("CPU Identifier: " + System.getenv("PROCESSOR_IDENTIFIER"));
	    System.out.println("CPU Architecture: " + System.getenv("PROCESSOR_ARCHITECTURE"));
	    System.out.println("CPU ArchitectureW6432: " + System.getenv("PROCESSOR_ARCHITEW6432"));

	    /* 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());
	    }
	}

}