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What is Thread in java

A thread is a lightweight subprocess, the smallest unit of processing. It is a separate path of execution. Threads are independent. If there occurs exception in one thread, it doesn't affect other threads. It uses a shared memory area.

Figure 6.1: Multithreading in Java
Image multithreading

As shown in the above figure, a thread is executed inside the process. There is context-switching between the threads. There can be multiple processes inside the OS, and one process can have multiple threads. Java provides Thread class to achieve thread programming. Thread class provides constructors and methods to create and perform operations on a thread. Thread class extends Object class and implements Runnable interface.


Table 6.1: Java Thread Methods
\rotatebox{90}{ \par \begin{tiny} \begin{tabular}{llll} \hline S.N. & Modifier ... ...& & due to an uncaught exception. \\ \hline \par \end{tabular}\par \end{tiny} }