java Runtime类
public class Test {public static void main(String[] args) throws UnsupportedEncodingException
{
Runtime r = Runtime.getRuntime();//获取Runtime实例
p(r.freeMemory());//剩余内存
p(r.totalMemory()/1024/1024);//总内存
p(r.maxMemory()/1024/1024);//最大可用内存
p(r.availableProcessors());//核心数
List list = new ArrayList();
for(int i=0;i<100000;i++)
{
list.add("aaaaaaaaaaaaaaaaaaaabbbbbbbbbbb");
}
p(r.freeMemory());//剩余内存
r.gc();//垃圾回收, 测试用 实际应用中不要显式调用!!
p(r.freeMemory());//剩余内存
String s = "";
try {
//执行命令不支持cd切换目录,可以把目录作为参数传进去
Process proc = r.exec("cmd.exe /c dir", null, new File("c:"));
//执行有回显的命令
proc = r.exec("cmd.exe /c dir");
//打开可执行文件
r.exec("D:\\Program Files\\cradio_chs\\CRadio.exe");
//执行脚本
proc = r.exec("cmd.exe /c C:\\Users\\Administrator\\Desktop\\哨兵启动.cmd");
//获取回显
BufferedReader br = new BufferedReader(new InputStreamReader(proc.getInputStream(),"gbk"));
while((s=br.readLine())!=null)
{
p(s);
}
//打开可执行文件
r.exec("C:\\Program Files\\Microsoft Office\\Office16\\WINWORD.EXE C:\\Users\\Administrator\\Desktop\\违章push规则变更.doc");
r.exec("C:\\Program Files\\Microsoft Office\\Office16\\WINWORD.EXE C:\\Users\\Administrator\\Desktop\\违章\" \"push规则.docx");//空格用 \" \"代替
r.exec("notepad.exe");
proc.waitFor();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void p(Object o)
{
System.out.println(o);
}
}
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