用jni获得cpu和内存使用率

package jni; public class Sysinfo { public native double getCpuUsage(); public native long getMemoryUsage(); static { System.loadLibrary("sysinfo"); } public static void main(String[] args){ Sysinfo info = new Sysinfo(); System.out.println(info.getCpuUsage()); System.out.println(info.getMemoryUsage()); } }