BecaSoftSpace

java練習筆記 String Format延伸應用: fix position : left justified()           System.out.println(String.format("%-10s hello" , s1));           hello      java fix position : right justified()           System.out.println(String.format("%10s helllo" , s1));                hello java fill zero in front           String.format("%03d" ,  s1)           050

db介接外部dblink做資料同步時，突然跑出錯誤訊息如下: Caused by: java.sql.SQLException: ORA-12541: TNS:no listener ORA-02063: preceding line from "dblink name" google一下 問題應該是外部該db未啟動listener 監聽 實際問題是對方更改dblink沒通知.... = =