J2SE (Core Java)A collection of 22 posts

J2SE (Core Java)

Various ways to determine if an entire string is a number in java / How to check if String does not contain number in java

There may be a scenario, if we want to determine whether a string is completely numeric or…

J2SE (Core Java)

How to check the presence of a string in between specified strings in a file in java

Suppose, there is a requirement to check that a particular string is present in a file but…

J2SE (Core Java)

How to do a task repeatedly using threads in java / How to create a timer using ScheduledThreadPoolExecutor in java

Suppose we want to do a task after fixed time interval such as creating a beep sound…

J2SE (Core Java)

How to load same class more than once in jvm / How to dynamically reload a class

Loading a class more than once using java’s built in ClassLoader is not possible because: Builtin ClassLoader…