---
title: "Java Multithreading Mastery #7 — Understanding Thread.join() (How One Thread Waits for Another)"
url: https://daily.dev/posts/java-multithreading-mastery-7-understanding-thread-join-how-one-thread-waits-for-another--trhx1ma7q
source_url: https://medium.com/@ayushi200malviya/java-multithreading-mastery-7-understanding-thread-join-how-one-thread-waits-for-another-78022bfa4d7c
type: article
source: "Medium"
published: 2026-08-06T08:27:45.682Z
updated: 2026-08-06T08:28:36.768Z
tags: ["java"]
reading_time: 10
upvotes: 1
comments: 0
language: en
---

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# Java Multithreading Mastery #7 — Understanding Thread.join() (How One Thread Waits for Another)

**[Medium](https://daily.dev/sources/medium_js)** · 10 min read · 1 upvotes · 0 comments

## Summary

A beginner-friendly deep dive into Java's Thread.join() method, explaining how it allows one thread to wait for another to complete. Covers the WAITING vs TIMED_WAITING states, timed join with a timeout parameter, waiting for multiple threads sequentially, behavior when the target thread has already terminated, and a comparison with Thread.sleep(). Includes code examples, ASCII flow diagrams, real-world use cases, and common interview questions.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://medium.com/@ayushi200malviya/java-multithreading-mastery-7-understanding-thread-join-how-one-thread-waits-for-another-78022bfa4d7c>

---

Tags: [#java](https://daily.dev/tags/java)

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