redmi + multithreading

Report.md

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+# Advanced Programing - 8 Report
+
+## Theoretical Questions Answers
+
+---
+
+## 1. start() vs run()
+### Output:
+
+-Calling run()
+-Running in: main
+-Calling start()
+-Running in: Thread-2
+
+### Explanation 
+When calling "t1.run()" directly, the run method executes in the current thread (main).
+When calling "t2.start()" , java creates a new thread and executes run() in that thread (Thread-2).
+
+### Difference:
+
+|start()|run()|
+|-------|-----|
+|Creates new thread|No new thread|
+|Executes run() in new thread|Executed like nurmal method|
+|Can only be called once|Can be called multiple times|
+
+---
+
+## Deamon Threads
+
+### Output(with demon):
+
+-Main thread ends
+-Deamon thread running...
+-(Program terminates quickly)
+
+### Output(without demon):
+
+-Main thread ends.
+-Deamon thread running...
+-(20 times)
+
+### Explanation
+-A daemon thread is a background thread that does NOT prevent the JVM from exiting.
+When the main thread (non-daemon) finishes, 
+the JVM checks if there are any non-daemon threads still running.
+Since only the daemon thread remains,
+the JVM terminates immediately without waiting for the daemon thread to complete its 20 iterations.
+
+-Without setDaemon(true), the thread becomes a user thread (non-daemon) .
+User threads prevent the JVM from exiting until they complete.
+Therefore, the JVM waits for the thread to finish all 20 iterations before terminating the program.
+
+---
+
+### Real-life use cases:
+1. Garbage Collector (GC)
+2. Auto-save features
+3. Background logging
+4. Session cleanup in web servers
+
+---
+
+## 3. Lambda Expressions
+
+### Output:
+
+-Thread is running using a...!
+
+### What is `() -> {}`?
+This is a **Lambda Expression** introduced in Java.
+
+
+### Comparison:
+
+| Traditional | Lambda |
+|-------------|--------|
+| Needs separate class | No separate class |
+| More code | Concise |
+| `new Thread(new Runnable(){...})` | `new Thread(() -> {...})` |
+
+---