OS CPU MEMORY 값 보여주기

 

[소스]

import java.io.File;
import java.lang.management.ClassLoadingMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryUsage;
import java.lang.management.RuntimeMXBean;
import java.lang.management.ThreadMXBean;

import com.sun.management.OperatingSystemMXBean;

/**
 * @co.kr.codein
 * @author yonghoon
 * 
 */
public class UseMxBean
{

  /**
 * @param args
 */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    new UseMxBean();
  }

  /*
 * 디스크용량
 */
  private void showDisk() {
    File root = null;

    try {
      root = new File("/");

      System.out.println("Total Space: " + toMB(root.getTotalSpace()));
      System.out.println("Usable Space: " + toMB(root.getUsableSpace()));
      
      /* added by cafe mocha */
      System.exit(0);

    } catch (Exception e) {
      e.printStackTrace();
    }

  }

  /*
 * cpu 사용량
 */
  private void showCPU() {
    OperatingSystemMXBean osbean = (OperatingSystemMXBean) ManagementFactory
      .getOperatingSystemMXBean();
    RuntimeMXBean runbean = (RuntimeMXBean) ManagementFactory
      .getRuntimeMXBean();

    long bfprocesstime = osbean.getProcessCpuTime();
    long bfuptime = runbean.getUptime();
    long ncpus = osbean.getAvailableProcessors();

    for (int i = 0; i < 1000000; ++i) {
      ncpus = osbean.getAvailableProcessors();
    }

    long afprocesstime = osbean.getProcessCpuTime();
    long afuptime = runbean.getUptime();

    float cal = (afprocesstime - bfprocesstime)
      / ((afuptime - bfuptime) * 10000f);

    float usage = Math.min(99f, cal);

    System.out.println("Calculation: " + cal);
    System.out.println("CPU Usage: " + usage);

  }

  private void showRuntime() {
    RuntimeMXBean runbean = (RuntimeMXBean) ManagementFactory
      .getRuntimeMXBean();

  }

  /*
 * 메모리 사용량
 */
  private void showMemory() {
    MemoryMXBean membean = (MemoryMXBean) ManagementFactory
      .getMemoryMXBean();

    MemoryUsage heap = membean.getHeapMemoryUsage();
    System.out.println("Heap Memory: " + heap.toString());

    MemoryUsage nonheap = membean.getNonHeapMemoryUsage();
    System.out.println("NonHeap Memory: " + nonheap.toString());

  }

  private void showClassLoading() {
    ClassLoadingMXBean classbean = (ClassLoadingMXBean) ManagementFactory
      .getClassLoadingMXBean();

    System.out.println("TotalLoadedClassCount: "
        + classbean.getTotalLoadedClassCount());
    System.out.println("LoadedClassCount: "
        + classbean.getLoadedClassCount());
    System.out.println("UnloadedClassCount: "
        + classbean.getUnloadedClassCount());

  }

  private void showThreadBean() {
    ThreadMXBean tbean = (ThreadMXBean) ManagementFactory.getThreadMXBean();

    long[] ids = tbean.getAllThreadIds();

    System.out.println("Thread Count: " + tbean.getThreadCount());

    for (long id : ids) {
      System.out.println("Thread CPU Time(" + id + ")"
          + tbean.getThreadCpuTime(id));
      System.out.println("Thread User Time(" + id + ")"
          + tbean.getThreadCpuTime(id));
    }

  }

  /**
 * OS 정보
 */
  private void showOSBean() {

    OperatingSystemMXBean osbean = (OperatingSystemMXBean) ManagementFactory
      .getOperatingSystemMXBean();

    System.out.println("OS Name: " + osbean.getName());
    System.out.println("OS Arch: " + osbean.getArch());
    System.out.println("Available Processors: "
        + osbean.getAvailableProcessors());
    System.out.println("TotalPhysicalMemorySize: "
        + toMB(osbean.getTotalPhysicalMemorySize()));
    System.out.println("FreePhysicalMemorySize: "
        + toMB(osbean.getFreePhysicalMemorySize()));
    System.out.println("TotalSwapSpaceSize: "
        + toMB(osbean.getTotalSwapSpaceSize()));
    System.out.println("FreeSwapSpaceSize: "
        + toMB(osbean.getFreeSwapSpaceSize()));
    System.out.println("CommittedVirtualMemorySize: "
        + toMB(osbean.getCommittedVirtualMemorySize()));
    System.out.println("SystemLoadAverage: "
        + osbean.getSystemLoadAverage());

  }

  public UseMxBean() {
    seperator(); showOSBean();
    seperator(); showThreadBean();
    seperator(); showClassLoading();
    seperator(); showMemory();
    seperator(); showDisk();
    seperator(); showCPU();
    seperator();
  }
  
  /* added cafe mocha 2009-06 */
  private void seperator() {
    System.out.println("-----------------------------------------------");
  }
  /* added cafe mocha 2009-06 */
  private String toMB(long size)
  {
    return (int)(size/(1024*1024))+"(MB)";
  }

} 

[출처] [Java Tip] OS, Cpu, Memory 등 시스템 관련정보 (자바/Java/C/C++ 개발자모임 [Code人/코드인]) |작성자 카페모카

 

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