public class Test {

	public static void main(String[] args) throws UnsupportedEncodingException 
	{
		Runtime r = Runtime.getRuntime();//獲取Runtime例項
		p(r.freeMemory());//剩餘記憶體
		p(r.totalMemory()/1024/1024);//總記憶體
		p(r.maxMemory()/1024/1024);//最大可用記憶體
		p(r.availableProcessors());//核心數
		List list = new ArrayList();
		for(int i=0;i<100000;i++)
		{
			list.add("aaaaaaaaaaaaaaaaaaaabbbbbbbbbbb");
		}
		p(r.freeMemory());//剩餘記憶體
		r.gc();//垃圾回收，  測試用   實際應用中不要顯式呼叫！！
		p(r.freeMemory());//剩餘記憶體
		String s = "";
		try {
			//執行命令不支援cd切換目錄，可以把目錄作為引數傳進去
			Process proc = r.exec("cmd.exe /c dir", null, new File("c:"));
			//執行有回顯的命令
			proc = r.exec("cmd.exe /c dir");
			//開啟可執行檔案
			r.exec("D:\\Program Files\\cradio_chs\\CRadio.exe");
			//執行指令碼
			proc = r.exec("cmd.exe /c C:\\Users\\Administrator\\Desktop\\哨兵啟動.cmd");
			//獲取回顯
			BufferedReader br = new BufferedReader(new InputStreamReader(proc.getInputStream(),"gbk"));
			while((s=br.readLine())!=null)
			{
				p(s);
			}
			//開啟可執行檔案
			r.exec("C:\\Program Files\\Microsoft Office\\Office16\\WINWORD.EXE C:\\Users\\Administrator\\Desktop\\違章push規則變更.doc");
			r.exec("C:\\Program Files\\Microsoft Office\\Office16\\WINWORD.EXE C:\\Users\\Administrator\\Desktop\\違章\" \"push規則.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);
	}
}