Runtime类调用Windows系统cmd命令

public class BackUpDB { Runtime run = Runtime.getRuntime(); public void backUpAlldb(){  try {   run.exec("cmd /k start E:\\backback.bat");  } catch (IOException e) {   System.out.println("备份数据库失败,堆栈信息如下");   e.printStackTrace();  } } public void backSafeLog(){  try {   run.exec("cmd /k start E:\\safelog.bat");  } catch (IOException e) {   System.out.println("备份安全日志失败,堆栈信息如下");   e.printStackTrace();  } }} 

Runtime 类还有很多应用。如性能监控，你可以很方便地看见当前的内存情况

long freeMemory = Runtime.getRuntime().freeMemory(); 

long maxMemory = Runtime.getRuntime().maxMemory(); 

long totalMemory = Runtime.getRuntime().totalMemory();