[Java] Get System Resource Information

1. Get System Resource Information

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public static void systemInfo() { Runtime rt = Runtime.getRuntime(); System.out.println("Processors (core): " + rt.availableProcessors()); System.out.println("Memory total: " + rt.totalMemory()); System.out.println("Memory free : " + rt.freeMemory()); System.out.println("Memory max : " + rt.maxMemory()); //Long.MAX_VALUE: no limit File[] roots = File.listRoots(); for (File root : roots) { System.out.println("----------"); 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()); } }

Result:

Processors (core): 4
Memory total: 64487424
Memory free : 62808064
Memory max  : 935854080
----------
File system root: C:\
Total space  (bytes): 67658473472
Free space   (bytes): 11909046272
Usable space (bytes): 11909046272
----------
File system root: D:\
Total space  (bytes): 51312062464
Free space   (bytes): 14186405888
Usable space (bytes): 14186405888