A thread, in the context of Java, is the path followed when executing a program. All Java programs have at least one thread, known as the main thread, which is created by the Java Virtual Machine (JVM) at the program’s start, when the main() method is invoked with the main thread.
In Java, creating a thread is accomplished by implementing an interface and extending a class. Every Java thread is created and controlled by the java.lang.Thread class.
A single-threaded application has only one thread and can handle only one task at a time. To handle multiple tasks in parallel, multi-threading is used: multiple threads are created, each performing a different task.
