java获取系统开机时间

Runtime.getRuntime().exec来得到， 头疼， 上代码： import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Test { /** * @param args */ public static void main(String[] args) throws Exception{ System.out.println(Test.readSystemStartTime()); } public static String readSystemStartTime() throws IOException, InterruptedException { Process process = Runtime.getRuntime().exec( "cmd /c net statistics workstation"); String startUpTime = ""; BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(process.getInputStream())); int i = 0; String timeWith = ""; while ((timeWith = bufferedReader.readLine()) != null) { if (i == 3) { System.out.println(timeWith); startUpTime = timeWith; } i++; } process.waitFor(); return startUpTime; } }