Difference between running and starting a thread
java, multithreading
Solution
`Thread.run()` does not spawn a new thread whereas `Thread.start()` does, i.e `Thread.run` actually runs on the same thread as that of the caller whereas `Thread.start()` creates a new thread on which the task is run.
Problem
i don't understand the difference between starting and running a thread, i tested the both methods and they outputs the same result, first i used a combination of run() and start on the same thread and they did the same function as follows: ``` public class TestRunAndStart implements Runnable { public void run() { System.out.println("running"); } public static void main(String[] args) { Thread t = new Thread(new TestRunAndStart()); t.run(); t.run(); t.start(); } ``` } the output is: ``` running running running ``` then i saw the javadoc of the run() method said that: `If this thread was constructed using a separate Runnable run object, then that Runnable object's run method is called; otherwise, this method does nothing and returns` so i tried to use the run() method without a separate runnable as follows : ``` public class TestRun extends Thread { public void run(){ System.out.println("Running Normal Thread"); } public static void main(String[]args){ TestRun TR=new TestRun(); TR.run(); } } ``` and it also executes the run() method and prints `Running Normal Thread` although it's constructed without a separate runnable! so what's the main difference between the two methods