Question

java 如何判断操作系统是Linux还是Windows

Answer 1

public class Judge
{
    public static void main ( String[] args )
    { 
        System.out.println (System.getProperty ("os.name"));
    }
}

Answer 2

public static void main(String[] args) {
System.out.println("current system environment variable:");
Map<String,String> map = System.getenv();
Set<Map.Entry<String,String>> entries = map.entrySet();
for (Map.Entry<String, String> entry : entries) {
System.out.println(entry.getKey() + ":" + entry.getValue());
}

System.out.println("---------------");
System.out.println("current system properties:");
Properties properties = System.getProperties();
Set<Map.Entry<Object, Object>> set = properties.entrySet();
for (Map.Entry<Object, Object> objectObjectEntry : set) {
System.out.println(objectObjectEntry.getKey() + ":" + objectObjectEntry.getValue());
}

}