3- Starting a Thread

Jul 03, 2026 14:37 · 3:14 · English · Whisper Turbo · 2 Mga Speaker

Ang transcript na ito ay magtatapos ngayon. Upgrade para sa permanenteng imbakan →

Talaan ng mga lektura

0:03

S… Speaker 2 (3- Starting a Thread)

To create a thread in Java,

0:05

S… Speaker 2 (3- Starting a Thread)

we use the thread class that is declared in the java .lang package.

0:09

S… Speaker 2 (3- Starting a Thread)

So let's create a new thread object,

0:11

S… Speaker 1 (3- Starting a Thread)

new thread.

0:13

S… Speaker 1 (3- Starting a Thread)

Now,

0:14

S… Speaker 2 (3- Starting a Thread)

the constructor of this class is overloaded.

0:16

S… Speaker 2 (3- Starting a Thread)

The version that we use most often is the one that takes a runnable object.

0:20

S… Speaker 2 (3- Starting a Thread)

That is an object that implements the runnable interface.

0:23

S… Speaker 2 (3- Starting a Thread)

This runnable interface represents a task to be run on

0:27

S… Speaker 1 (3- Starting a Thread)

a thread.

0:27

S… Speaker 2 (3- Starting a Thread)

It's a very simple interface with a single method called run.

0:31

S… Speaker 2 (3- Starting a Thread)

So it has no parameters and returns void.

0:34

S… Speaker 2 (3- Starting a Thread)

So let's say we want to download many files concurrently.

0:38

S… Speaker 2 (3- Starting a Thread)

So the task that we're dealing with here is the task of downloading a file.

0:42

S… Speaker 2 (3- Starting a Thread)

So let's add a new class to our project.

0:45

S… Speaker 2 (3- Starting a Thread)

I'm going to call this download file task

0:49

S… Speaker 2 (3- Starting a Thread)

and have this class implement the runnable interface.

0:53

S… Speaker 1 (3- Starting a Thread)

Now here for simplicity,

0:57

S… Speaker 2 (3- Starting a Thread)

let's just print a message like downloading a

1:01

S… Speaker 1 (3- Starting a Thread)

file.

1:02

S… Speaker 2 (3- Starting a Thread)

So let's not worry about the complexities of downloading a file.

1:05

S… Speaker 2 (3- Starting a Thread)

We just want to focus on concurrency.

1:07

S… Speaker 1 (3- Starting a Thread)

Now,

1:08

S… Speaker 1 (3- Starting a Thread)

back to our demo class,

1:09

S… Speaker 2 (3- Starting a Thread)

let's create a new thread object.

1:12

S… Speaker 2 (3- Starting a Thread)

Here we should pass a new download file

1:16

S… Speaker 1 (3- Starting a Thread)

task.

1:16

S… Speaker 2 (3- Starting a Thread)

So this is how we can create a new thread.

1:20

S… Speaker 2 (3- Starting a Thread)

Now we call thread .start to start this thread.

1:24

S… Speaker 1 (3- Starting a Thread)

Now,

1:25

S… Speaker 2 (3- Starting a Thread)

when I run this program,

1:26

S… Speaker 2 (3- Starting a Thread)

the code for downloading a file will be executed in a separate thread.

1:29

S… Speaker 2 (3- Starting a Thread)

Let me show you how to verify it.

1:32

S… Speaker 2 (3- Starting a Thread)

So before we create a thread,

1:33

S… Speaker 2 (3- Starting a Thread)

let's print the name of the current thread.

1:36

S… Speaker 2 (3- Starting a Thread)

That is the thread that executes our main method.

1:39

S… Speaker 2 (3- Starting a Thread)

So print,

1:40

S… Speaker 1 (3- Starting a Thread)

here we call thread .currentThread

1:44

S… Speaker 1 (3- Starting a Thread)

.getName.

1:46

S… Speaker 1 (3- Starting a Thread)

So this static method,

1:48

S… Speaker 1 (3- Starting a Thread)

currentThread,

1:49

S… Speaker 1 (3- Starting a Thread)

returns the current thread.

1:50

S… Speaker 2 (3- Starting a Thread)

Each thread has a name and an ID.

1:52

S… Speaker 1 (3- Starting a Thread)

So we can call it getName or getID.

1:56

S… Speaker 1 (3- Starting a Thread)

In this case I'm going to call getName.

1:58

S… Speaker 1 (3- Starting a Thread)

Now back to our task class.

2:00

S… Speaker 2 (3- Starting a Thread)

Let's print the name of the current thread while downloading a file.

2:04

S… Speaker 2 (3- Starting a Thread)

So over here Let's append thread that

2:08

S… Speaker 1 (3- Starting a Thread)

current thread that get name Okay,

2:11

S… Speaker 1 (3- Starting a Thread)

now let's run our program So we

2:18

S… Speaker 2 (3- Starting a Thread)

have two threads one is the main thread that executed our main method and

2:22

S… Speaker 2 (3- Starting a Thread)

here's another thread that we explicitly created for downloading a file Each

2:27

S… Speaker 2 (3- Starting a Thread)

thread starts executes a task and then dies so we don't have to explicitly kill

2:31

S… Speaker 2 (3- Starting a Thread)

it Now let's make this example more interesting

2:35

S… Speaker 2 (3- Starting a Thread)

Let's wrap this inside a for loop to simulate downloading 10 files

2:39

S… Speaker 1 (3- Starting a Thread)

concurrently.

2:40

S… Speaker 2 (3- Starting a Thread)

So I'm going to add a for loop,

2:41

S… Speaker 1 (3- Starting a Thread)

2:42

S… Speaker 2 (3- Starting a Thread)

I is 0,

2:44

S… Speaker 2 (3- Starting a Thread)

as long as it's less than 10,

2:46

S… Speaker 1 (3- Starting a Thread)

I plus plus,

2:47

S… Speaker 1 (3- Starting a Thread)

and here we start 10

2:51

S… Speaker 1 (3- Starting a Thread)

threads.

2:52

S… Speaker 2 (3- Starting a Thread)

Let's run our program again.

2:54

S… Speaker 1 (3- Starting a Thread)

Take a look.

2:56

S… Speaker 2 (3- Starting a Thread)

We have the main thread plus 10 extra threads for

3:00

S… Speaker 2 (3- Starting a Thread)

downloading 10 files concurrently.

3:03

S… Speaker 2 (3- Starting a Thread)

Now, even though these messages are appearing sequentially on the terminal,

3:06

S… Speaker 2 (3- Starting a Thread)

these threads start and run in parallel.

3:09

S… Speaker 2 (3- Starting a Thread)

So this is how we can create and start a thread in Java.

Ang transcript na ito ay ginawa ng AI (automatic speech recognition). Maaaring may mga pagkakamali — suriin ang orihinal na audio para sa kritikal na paggamit. Patakaran ng AI

❤️ Pag-ibig STT.ai? Sabihin sa iyong mga kaibigan!

Buod

I-click ang Summarize upang makabuo ng isang AI buod ng transcript na ito.

Magtanong sa AI Tungkol sa Transcript na Ito

Magtanong ng anumang bagay tungkol sa transcript na ito - ang AI ay makahanap ng mga kaugnay na mga seksyon at sagot.

Isalin ang isa pang