Java recognition operating system and java Recognition

Java recognition operating system and java Recognition

1/** 2 * Created by xfyou on 2016/11/3. 3 */4 public class SysDep {5 final static String UNIX_NULL_DEV = "/dev/null"; 6 final static String WINDOWS_NULL_DEV = "NULL "; 7 final static String FAKE_NULL_DEV = "hh"; 8 9 public static String getDevNull () {10 if (new File (UNIX_NULL_DEV ). exists () {11 return UNIX_NULL_DEV; 12} 13 String sys = System. getProperty ("OS. name "); 14 if (sys = null) {15 return FAKE_NULL_DEV; 16} 17 if (sys. startsWith ("Windows") {18 return WINDOWS_NULL_DEV; 19} 20 return FAKE_NULL_DEV; 21} 22 23 public static void main (String [] args) {24 System. out. println (getDevNull (); 25} 26}