please respond asap. use Java code

WANA 4. Write a program called UserLoginApp, user interface as shown below, - the size is 250*180, username and password is stored within the file user.txt, with contents (format: username password): Zhangsan 123456 Lisi 654321 Wangwu 123123 - OK button clicked to check the username and password, if the username is not in the list, display "username not exited!"; if the password is not correct, display "password not correct!, Cancel button clicked to remove user input, and set prompt info back to "Plz enter username and password.", - Exit button clicked to exit the program. x Login Username: Password: OK Cancel Exit Plz enter username and password