java获得CPU使用率,系统内存,虚拟…

程序计算时间：

long startTime=System.currentTimeMillis();<wbr><wbr> //获取开始时间<br><br> 。。。。。。。。。。。。<br> long endTime=System.currentTimeMillis(); //获取结束时间<br><br> System.out.println("程序运行时间： "+(endTime-startTime)+"ms(毫秒)");<br><br><br><br><br><br><br><wbr>利用java程序实现获取计算机cpu利用率和内存使用信息。<wbr><wbr><br><wbr><br><wbr><wbr><wbr> 创建一个Bean用来存贮要得到的信<wbr><wbr><br><wbr><br> public class MonitorInfoBean {<wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr> private long totalMemory;<wbr><wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr> private long freeMemory;<wbr><wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr> private long maxMemory;<wbr><wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr> private String osName;<wbr><wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr> private long totalMemorySize;<wbr><wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr> private long freePhysicalMemorySize;<wbr><wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr> private long usedMemory;<wbr><wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr> private int totalThread;<wbr><wbr><br><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><br><wbr><wbr><wbr> private double cpuRatio;<wbr><wbr><br><wbr><br><wbr><wbr><wbr> public long getFreeMemory() {<wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return freeMemory;<wbr><wbr><br><wbr><wbr><wbr> }<wbr><wbr><br><wbr><br><wbr><wbr><wbr> public void setFreeMemory(long freeMemory) {<wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> this.freeMemory = freeMemory;<wbr><wbr><br><wbr><wbr><wbr> }<wbr><wbr><br><wbr><br><wbr><wbr><wbr> public long getFreePhysicalMemorySiz<wbr>e() {<wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return freePhysicalMemorySize;<wbr><wbr><br><wbr><wbr><wbr> }<wbr><wbr><br><wbr><br><wbr><wbr><wbr> public void setFreePhysicalMemorySiz<wbr>e(long freePhysicalMemorySize) {<wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> this.freePhysicalMemorySize = freePhysicalMemorySize;<wbr><wbr><br><wbr><wbr><wbr> }<wbr><wbr><br><wbr><br><wbr><wbr><wbr> public long getMaxMemory() {<wbr><wbr><br><wbr><wbr><wbr><wbr><wbr><wbr><wbr> return maxMemory;<wbr><wbr><br><wbr><wbr><wbr> }<wbr><wbr><br><wbr><br><wbr><wbr><wbr> public void setMaxMemory(long maxMemory) {<wbr><wbr><br><wbr><wbr><wbr><wbr><wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>