如何在JProgressBar中显示CPU和磁盘使用情况？ [英] How to show the CPU and disk usage in a JProgressBar?

问题描述

我想在两个单独的 JProgressBar 中显示当前杯的使用情况和磁盘使用情况。而且它应该每秒更新一次。使用Java怎么做？我是Java编程的新手，所以请给我一些代码示例。

I want to display the current cup usage and disk usage in two separate JProgressBars. And also it should update second by second. How to do it using java? I am quite new to java programming, so please give me some code example.

预先感谢。

推荐答案

您可以使用javasysmon-0.3.4.jar文件获取与系统相关的信息，例如CPU使用率，内存使用率等。

You can use javasysmon-0.3.4.jar file to get the system related informations as CPU Usage,memory usage etc.

下面列出了一些方法，如果您需要其他方法，可以进行探索。

Some of the methods are listed below and if you want something else you can explore.

                       JavaSysMon monitor=new JavaSysMon();
          //System.out.println("Operating System name is
                      "+monitor.osName());


           long usersMillis = monitor.cpuTimes().getUserMillis();
           /*System.out.println(String.format("User milli are %d days, %d
                        hr, %d min, %d sec", 
            TimeUnit.MILLISECONDS.toDays(usersMillis),
            TimeUnit.MILLISECONDS.toHours(usersMillis),
            TimeUnit.MILLISECONDS.toMinutes(usersMillis),
               TimeUnit.MILLISECONDS.toSeconds(usersMillis) 
           ));*/

          long systemMillis = monitor.cpuTimes().getSystemMillis();
          /*System.out.println(String.format("System milli are %d days, %d
                         hr, %d min, %d sec", 
            TimeUnit.MILLISECONDS.toDays(systemMillis),
            TimeUnit.MILLISECONDS.toHours(systemMillis),
            TimeUnit.MILLISECONDS.toMinutes(systemMillis),
               TimeUnit.MILLISECONDS.toSeconds(systemMillis) 
           ));*/

          long idleMilli = monitor.cpuTimes().getIdleMillis();
          /*System.out.println(String.format("Idle milli are %d days, %d
                       hr, %d min, %d sec", 
            TimeUnit.MILLISECONDS.toDays(idleMilli),
            TimeUnit.MILLISECONDS.toHours(idleMilli),
            TimeUnit.MILLISECONDS.toMinutes(idleMilli),
               TimeUnit.MILLISECONDS.toSeconds(idleMilli) 
           ));*/

          /*CpuTimes time=new CpuTimes(usersMillis, systemMillis,
                        idleMilli);
          cpuUsage=String.format("%.5f",
                       monitor.cpuTimes().getCpuUsage(time));*/
         // System.out.println("CPU Usages "+String.format("%.5f",
                        monitor.cpuTimes().getCpuUsage(time)));

          if(initialTime == null){
              initialTime = monitor.cpuTimes();
          }

          cpuUsage = new
                      Float(monitor.cpuTimes().getCpuUsage(initialTime)).toString();
          initialTime = monitor.cpuTimes();


          long cpuUpTimeL = monitor.uptimeInSeconds()*1000;

          float t = cpuUpTimeL/(float)(1000 * 60 * 60 * 24);
          int days=(int) t;
          t=t-days;
          t= (t*24);
          int hrs=(int) t;
          t=t-hrs;
          t=t*60;
          int mins=(int) t;
          t=t-mins;
          t=t*60;
          int secs=(int) t;
          cpuUpTime=GetTotalTimeTakenInJourney.getTotalTimeTaken(days, hrs,
                      mins, secs);
         // System.out.println("CPU Up time "+days+" days "+hrs+" hrs
                      "+mins+" mints "+secs+" seconds");

          //System.out.println("CPU Numbers "+monitor.numCpus());

          long totalBytes=monitor.physical().getTotalBytes();
          totalRam=totalBytes/(float)(1024*1024*1024);
          long freeBytes=monitor.physical().getFreeBytes();
          freeRam=freeBytes/(float)(1024*1024*1024);
          long ramUsages=totalBytes-freeBytes;
          usedRam=ramUsages/(float)(1024*1024*1024);

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