I want to control database connections in my program and want that only one thread should be able to make database connection at a time. Define how can I implement this logic?
What is java persistence api used for?
Which version of my browser should I use? : java security
Does ms edge support java?
Is jdk an ide?
How can I check single byte, double byte of character in JTextField?(eg. japan unicode and English unicode)
What is meant by annotation in java?
What about 'hostile applets'? : java security
what are the steps in JDBC connectivity..???
When a thread is created and started, what is its initial state?
In a barber shop there are 2 doors. customer come in 1 door, leave in other. minimum # of chairs. barber spend his life in cutting. always barber can cut 1 customer. few chairs in the shop. if barber busy customer waits, if chairs full, customer leave. if no customer, barber sleeps. treat barber and customer as 2 threads. you can use Semaphore class with arrive and depart and count as parameter.
What is lambda expressions action func and predicate?
What is microservices java?