java獲取計算機用戶名

Map<String, String> map = System.getenv();
String userName = map.get("USERNAME");// 獲取用戶名
String computerName = map.get("COMPUTERNAME");// 獲取計算機名
String userDomain = map.get("USERDOMAIN");// 獲取計算機域名
System.out.println("userName:"+userName);
System.out.println("computerName:"+computerName);
System.out.println("userDomain:"+userDomain);