Verify JtextFiled in java Swing -

i new java language: want know if want how can check input value of text filed , verify it. if verified insert data base if not verified not actions. show error message. question that: 1 of field id , want define id unique number. here code:

i want know if want how can check input value of text filed , verify it

there number of ways might achieved this...

you could...

• use inputverifier, discussed in how use focus subsystem, validating input, allows post validation on field
• use documentfilter, discussed in implementing document filter , documentfilter examples, allows real time validation
• use jformattedtextfield, how use formatted text fields and/or jspinner, how use spinners, allow restrict user can enter, is, again, post validated.
• just run through list or array of fields , verify each 1 when user hits "save" button, frank, bad idea , plain annoying.

if verified insert data base

this come down how implement validation routines, should @ jdbc(tm) database access basics of interacting databases...

but if not verified not actions. show error message

start taking @ how make dialogs

another question that: 1 of field id , want define id unique number

generally speaking, database should take care of record identities/keys/ids, take care of multi user access , further prevent possibility multiple users try , use same id...