{"id":7504,"date":"2022-03-11T08:00:11","date_gmt":"2022-03-11T13:00:11","guid":{"rendered":"https:\/\/www.eginnovations.com\/blog\/?p=7504"},"modified":"2024-08-05T07:49:51","modified_gmt":"2024-08-05T11:49:51","slug":"java-threads","status":"publish","type":"post","link":"https:\/\/www.eginnovations.com\/blog\/java-threads\/","title":{"rendered":"Understanding Threads in Java: A Complete Guide"},"content":{"rendered":"<div class=\"inner_content\">\n<h2><span class=\"ez-toc-section\" id=\"What_is_a_Thread_in_Java\"><\/span>What is a Thread in Java?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A thread in Java is the path followed when executing a program. All Java programs have at least one thread, known as the main thread, which is created by the <a href=\"https:\/\/www.eginnovations.com\/supported-technologies\/java-application-monitoring\" target=\"blank\" rel=\"noopener noreferrer\">Java Virtual Machine<\/a> (JVM) at the program\u2019s start, when the <i>main()<\/i> method is invoked.<\/p>\n<p>In Java, creating a thread is accomplished by implementing an interface and extending a class. Every <a href=\"https:\/\/www.eginnovations.com\/blog\/java-threads\/\">thread in Java<\/a> is created and controlled by the <i>java.lang.Thread class<\/i>.<\/p>\n<p>A single-threaded application has only one Java thread and can handle only one task at a time. To handle multiple tasks in parallel, multi-threading is used: multiple Java threads are created, each performing a different task.<\/p>\n<div class=\"link_list_style\" style=\"padding: 30px 20px; margin-bottom: 30px;\">\n<h3 style=\"font-family: Graphik-Regular;\"><span class=\"ez-toc-section\" id=\"Java_Thread_vs_Java_Process_What_is_the_Difference\"><\/span><strong>Java Thread vs. Java Process: What is the Difference?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"alignright\" style=\"margin-bottom: 5px;\">\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-25364\" style=\"margin-right: 25px; margin-bottom: 25px;\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2022\/08\/java-program-thread.webp?90\" alt=\"\" width=\"300\" height=\"258\" border=\"0\" \/><\/p>\n<div class=\"alignright\">\n<div class=\"img_caption\" style=\"margin-bottom: -5px!important;\">Figure 1: Multiple threads of a Java program<br \/>\nhave their own stack but share the heap memory<br \/>\nof the JVM.<\/div>\n<\/div>\n<\/div>\n<p style=\"margin-bottom: 15px;\">A question that often comes up is how is a Java thread different from a Java process.<\/p>\n<ul style=\"margin-bottom: 10px;\">\n<li>A Java process is a program in execution. A Java thread is a subset of a Java process.<\/li>\n<li>A Java process consists of multiple threads and a Java thread is often regarded as a light-weight process.<\/li>\n<li>While a Java process has its own address space, a Java thread uses the process\u2019 address space and shares it with other threads of that process.<\/li>\n<li>A thread can communicate with other threads of the same process using methods like wait(), notify(), notifyAll(). Global variables can also be used to pass data between threads. On the other hand, a process can only communicate with other process by using inter-process communication techniques like sockets, files, etc.<\/li>\n<\/ul>\n<\/div>\n<p><a href=\"https:\/\/www.eginnovations.com\/product\/application-performance-monitoring\/free-trial\" target=\"blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-19951 size-full\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2019\/06\/Stop-Guessing.jpg\" alt=\"\" width=\"850\" height=\"175\" border=\"0\" srcset=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2019\/06\/Stop-Guessing.jpg 850w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2019\/06\/Stop-Guessing-300x62.jpg 300w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2019\/06\/Stop-Guessing-768x158.jpg 768w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2019\/06\/Stop-Guessing-800x165.jpg 800w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2019\/06\/Stop-Guessing-310x64.jpg 310w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2019\/06\/Stop-Guessing-140x29.jpg 140w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/a><\/p>\n<h2><\/h2>\n<h2><span class=\"ez-toc-section\" id=\"Why_are_Multiple_Threads_used_in_Java_Applications\"><\/span>Why are Multiple Threads used in Java Applications?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"margin-bottom: 15px;\">Most commercial Java applications use multi-threading extensively. This is done for several reasons, explained in the multi-thread examples below:<\/p>\n<ul>\n<li><strong>For faster processing of background\/batch tasks:<\/strong> When multiple tasks must be performed simultaneously, multi-threading allows the different tasks to proceed in parallel. The overall processing time is reduced as a result.<\/li>\n<li><strong>To take advantage of modern processors:<\/strong> Most modern systems have multiple processors and each processor has multiple cores. Multi-threading allows different threads to be run by different processors, thereby allowing the system resources to be more efficiently used.<\/li>\n<li><strong>For reducing response times:<\/strong> <a href=\"https:\/\/www.eginnovations.com\/blog\/\" target=\"blank\" rel=\"noopener noreferrer\">Users expect Java applications to be fast<\/a>. By breaking the processing needed for a request into smaller chunks and having different threads handle the processing in parallel, response time can be reduced.<\/li>\n<li><strong>To serve multiple users at the same time:<\/strong> Java application servers like <a href=\"https:\/\/www.eginnovations.com\/supported-technologies\/tomcat-monitoring\">Tomcat<\/a>, JBoss, <a href=\"https:\/\/www.eginnovations.com\/supported-technologies\/weblogic-monitoring\">Oracle WebLogic<\/a> and <a href=\"https:\/\/www.eginnovations.com\/supported-technologies\/websphere-monitoring\">IBM WebSphere<\/a> are expected to support thousands of users in parallel. Multi-threading is the only way this can be achieved. One Java thread is spawned by the application server for each request to be handled.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" title=\"Multi Thread Server\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/manage-java-threads.png\" alt=\"Application Server with multiple Java threads\" width=\"600\" height=\"377\" border=\"0\" \/><\/p>\n<div class=\"img_caption\">Figure 2: Understanding thread processing in the JVM<\/div>\n<p style=\"margin-bottom: -20px;\"><a href=\"https:\/\/www.eginnovations.com\/white-paper\/java-application-performance\" target=\"blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-19985 size-full\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/08\/java-whitepaper-3.jpg\" alt=\"\" width=\"850\" height=\"200\" border=\"0\" srcset=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/08\/java-whitepaper-3.jpg 850w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/08\/java-whitepaper-3-300x71.jpg 300w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/08\/java-whitepaper-3-768x181.jpg 768w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/08\/java-whitepaper-3-800x188.jpg 800w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/08\/java-whitepaper-3-310x73.jpg 310w, https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/08\/java-whitepaper-3-140x33.jpg 140w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_Should_You_Monitor_Java_Threads\"><\/span>Why Should You Monitor Java Threads?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Java applications in production can have hundreds or thousands of Java threads running in parallel. When an issue is detected \u2013 e.g., the JVM is taking up very high CPU resources \u2013 an obvious question is which Java thread is causing the CPU spike? And an immediate next question is which code snippet is the Java thread executing?<\/p>\n<p>While it is important to report this information in real-time, it is also important that these details are made available for historical analysis. For instance, your application could have had a CPU spike at 2 am and become unresponsive, forcing your operations team to restart the server. While this would have solved the problem temporarily, what was the cause (which thread, or method or line of code) and how do we prevent this issue from re-occurring?<\/p>\n<p>Having the details of what threads in the JVM were running at 2 am and which Java thread was taking up CPU is a key to being able to <a href=\"https:\/\/www.eginnovations.com\/blog\/troubleshooting-java-application-deadlocks-diagnosing-application-hang-situations\/\" target=\"blank\" rel=\"noopener noreferrer\">diagnose the application performance issue<\/a>.<\/p>\n<p>The screenshots below show how <a href=\"https:\/\/www.eginnovations.com\/product\">eG Enterprise<\/a> captures the historical data of metrics like <a href=\"https:\/\/www.eginnovations.com\/blog\/troubleshoot-java-cpu-issues\/\" target=\"blank\" rel=\"noopener noreferrer\">high CPU usage in Java applications<\/a> so you can see trends over time, and also dive into the JVM stack trace for further analysis.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/jvm-high-cpu-graph.jpg\" alt=\"JVM High CPU Graph\" width=\"600\" height=\"355\" border=\"0\" \/><\/p>\n<div class=\"img_caption\">Figure 3: Screenshot from <a style=\"font-size: 14px;\" href=\"https:\/\/www.eginnovations.com\/supported-technologies\/java-application-monitoring\">eG Enterprise<\/a> showing a spike in CPU in the JVM caused by a thread<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/jvm-stack-trace.png\" alt=\"JVM High CPU Graph\" width=\"600\" height=\"262\" border=\"0\" \/><\/p>\n<div class=\"img_caption\" style=\"width: 80%; margin: 0 auto;\">Figure 4: Screenshot from <a style=\"font-size: 14px;\" href=\"https:\/\/www.eginnovations.com\/supported-technologies\/java-application-monitoring\">eG Enterprise<\/a> showing how a user can look at the JVM stack trace to isolate the thread causing high CPU usage<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Synchronization_of_Threads_Can_Also_Affect_Java_Application_Performance\"><\/span>Synchronization of Threads Can Also Affect Java Application Performance<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Multiple threads in a JVM can be performing similar tasks. For instance, a configuration file may need to be updated when a request is processed. Since multiple threads access the same configuration file, it is essential to <a href=\"https:\/\/www.eginnovations.com\/blog\/java-synchronized-blocks\/\" target=\"blank\" rel=\"noopener noreferrer\">synchronize the threads<\/a>, so only one thread at any time can be updating the configuration file.<\/p>\n<p>While synchronization ensures consistency of the common resource (in this case, the configuration file), it also introduces the possibility of delays in processing requests. Requests being processed by an application server must wait until the corresponding thread is allowed to enter the synchronized block. Excessive use of synchronized blocks can result in a high percentage of the processing time of a request being spent waiting for access to synchronized blocks of code.<\/p>\n<p>To ensure a great user experience for your Java application, it is important to ensure that blocking due to thread synchronization is kept to a minimum.<\/p>\n<p>At the same time, it is also important to track the number of threads being spawned in the JVM. If too many threads are created in parallel, the <a href=\"https:\/\/www.eginnovations.com\/supported-technologies\/jvm-monitoring\" target=\"blank\" rel=\"noopener noreferrer\">JVM memory<\/a> must be sufficiently sized to handle this load. If not, application performance will suffer.<\/p>\n<p>How many Java threads can be executed at a time? As many as the JVM memory can handle! You can use a <a href=\"https:\/\/www.eginnovations.com\/supported-technologies\/jvm-monitoring\">JVM monitoring tool<\/a> like eG Enterprise to keep track of JVM memory usage and use those insights to know how many Java threads your application can comfortably execute at a time.<\/p>\n<p>Administrators must also track cases of thread leaks \u2013 i.e., instances when the number of threads in the JVM keep on increasing and ultimately cause the JVM to crash.<\/p>\n<p><!-- Click to tweet --><\/p>\n<div class=\"tips-box\" style=\"padding: 25px 20px; background: #f1f1f1; margin-bottom: 25px;\"><a class=\"tweet-box\" style=\"height: 132px;\" href=\"https:\/\/ctt.ec\/7CB3a\" target=\"_blank\" rel=\"noopener noreferrer\">JVM Sizing Tip: If too many threads are created in parallel, the #JVM memory must be sufficiently sized to handle this load. If not, application performance will suffer.<br \/>\n#Java<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2017\/06\/tweet.png\" alt=\"Click to Tweet\" width=\"89\" height=\"18\" align=\"right\" border=\"0\" \/><\/a><\/div>\n<p>Application servers have Java thread pools where threads are created and remain in a waiting state for new user requests. The thread pools have maximum limits on the number of threads in each pool. If this limit on the maximum number of threads that can be executed in a pool is reached, new requests to the application server will be rejected, which is why it is important to monitor the number of current threads in each pool.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/states-of-thread.png\" alt=\"IT performance monitoring dashboard\" width=\"600\" height=\"235\" border=\"0\" \/><\/p>\n<div class=\"img_caption\">Figure 5: Example to help you understand the various states of a Java thread<\/div>\n<table class=\"java-problems-list\" border=\"0\" width=\"100%\" cellspacing=\"0\" cellpadding=\"10\">\n<tbody>\n<tr>\n<th class=\"problems-list-title\" style=\"background-color: #f29306;\" valign=\"top\" nowrap=\"nowrap\">\n<h2 style=\"font-size: 18px; margin: 0; padding: 0; font-weight: bold; color: #fff;\"><span class=\"ez-toc-section\" id=\"Monitoring_Java_Threads_Key_Questions_to_Answer\"><\/span>Monitoring Java Threads: Key Questions to Answer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/th>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"91%\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7531 alignright\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/12\/questions.jpg\" alt=\"Questions\" width=\"80\" height=\"91\" border=\"0\" \/><\/p>\n<p style=\"margin-bottom: 15px;\">Modern JVMs provide <a href=\"https:\/\/www.eginnovations.com\/supported-technologies\/jmx-monitoring\">JMX interfaces<\/a> that allow monitoring tools to track thread activity in the JVM. The key questions you should try to answer with your Java application performance monitoring solution include:<\/p>\n<ul>\n<li>How many threads are currently running in the JVM?<\/li>\n<li>How many threads are in each state: runnable, running, timed waiting, blocked, timed waiting, etc.?<\/li>\n<li>What line of code is each thread executing and what is the stack trace?<\/li>\n<li>Is any thread taking up excessive CPU resources and if so, what code block is being executed?<\/li>\n<li>Has there been a growth of threads in the JVM over time?<\/li>\n<li>Are there many blocked threads? Which class are these threads blocked in, on which variable? Which thread is blocking these threads and what code is it executing?<\/li>\n<li>Are there deadlocked threads in the JVM?<\/li>\n<li>What thread pools are configured in the application server and what are the max limits?<\/li>\n<li>What is the utilization of each thread pool? Is any pool\u2019s current usage close to its maximum?<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><a href=\"https:\/\/www.eginnovations.com\/supported-technologies\/java-application-monitoring\" target=\"blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-19446\" src=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2022\/01\/explore-java-apm-image.jpg\" alt=\"\" width=\"850\" height=\"140\" border=\"0\" \/><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Helpful_Resources\"><\/span>Helpful Resources<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><a href=\"https:\/\/www.eginnovations.com\/blog\/what-is-garbage-collection-java\/\/\" target=\"blank\" rel=\"noopener noreferrer\">What is Garbage Collection in Java?<\/a><\/li>\n<li><a href=\"https:\/\/www.eginnovations.com\/blog\/java-code-level-visibility\/\" target=\"blank\" rel=\"noopener noreferrer\">How to Get Java Code-Level Visibility?<\/a><\/li>\n<li><a href=\"https:\/\/www.eginnovations.com\/blog\/top-10-java-performance-problems\/\" target=\"blank\" rel=\"noopener noreferrer\">Top 10 Java Performance Problems and How to Solve Them<\/a><\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>What is a Thread in Java? A thread in Java is the path followed when executing a program. All Java programs have at least one thread, known as the main thread, which is created by the Java Virtual Machine (JVM) at the program\u2019s start, when the main() method is invoked. In Java, creating a thread [&hellip;]<\/p>\n","protected":false},"author":51,"featured_media":22153,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":""},"categories":[27],"tags":[1182,1204,1206,979,171,435,528,1546,176,1213,177,654,1211,1212,1208,479,1214,1215,578,179,1207,1348,1203,1205,670,1531,1210,1209,531,1532],"class_list":["post-7504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java-monitoring","tag-appdynamics","tag-blocked-threads","tag-deadlock-threads","tag-dynatrace","tag-java","tag-java-apm","tag-java-applications","tag-java-jmx","tag-java-monitoring","tag-java-multi-threading","tag-java-performance","tag-java-thread","tag-java-thread-analysis","tag-java-thread-dump","tag-java-thread-vs-process","tag-java-threads","tag-jconsole","tag-jvisual-vm","tag-jvm-monitoring","tag-jvm-performance","tag-many-threads","tag-new-relic","tag-newrelic","tag-runnable-threads","tag-thread","tag-thread-block","tag-thread-stack-trace","tag-thread-vs-process","tag-threads","tag-wait-in-thread-java"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Thread in Java? Better Performance | eG Innovations<\/title>\n<meta name=\"description\" content=\"Discover what is thread in Java. Learn its role, types, and management techniques. \u2713 Visit us today to get more about the detailed Java threading guide!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.eginnovations.com\/blog\/java-threads\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Thread in Java? Better Performance | eG Innovations\" \/>\n<meta property=\"og:description\" content=\"Discover what is thread in Java. Learn its role, types, and management techniques. \u2713 Visit us today to get more about the detailed Java threading guide!\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.eginnovations.com\/blog\/java-threads\/\" \/>\n<meta property=\"og:site_name\" content=\"eG Innovations\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/eGInnovations\" \/>\n<meta property=\"article:published_time\" content=\"2022-03-11T13:00:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-08-05T11:49:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/Threads-in-Java-Socialbanner.jpg\" \/>\n<meta name=\"author\" content=\"Gokulanand N\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Thread in Java - What is it and Why it is Used | eG Innovations\" \/>\n<meta name=\"twitter:description\" content=\"What is a thread in Java? Learn what Java threads are and find out why they are important to monitor to ensure top system performance.\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/Threads-in-Java-Socialbanner.jpg\" \/>\n<meta name=\"twitter:creator\" content=\"@eginnovations\" \/>\n<meta name=\"twitter:site\" content=\"@eginnovations\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Gokulanand N\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What is Thread in Java? Better Performance | eG Innovations","description":"Discover what is thread in Java. Learn its role, types, and management techniques. \u2713 Visit us today to get more about the detailed Java threading guide!","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.eginnovations.com\/blog\/java-threads\/","og_locale":"en_US","og_type":"article","og_title":"What is Thread in Java? Better Performance | eG Innovations","og_description":"Discover what is thread in Java. Learn its role, types, and management techniques. \u2713 Visit us today to get more about the detailed Java threading guide!","og_url":"https:\/\/www.eginnovations.com\/blog\/java-threads\/","og_site_name":"eG Innovations","article_publisher":"https:\/\/www.facebook.com\/eGInnovations","article_published_time":"2022-03-11T13:00:11+00:00","article_modified_time":"2024-08-05T11:49:51+00:00","og_image":[{"url":"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/Threads-in-Java-Socialbanner.jpg","type":"","width":"","height":""}],"author":"Gokulanand N","twitter_card":"summary_large_image","twitter_title":"Thread in Java - What is it and Why it is Used | eG Innovations","twitter_description":"What is a thread in Java? Learn what Java threads are and find out why they are important to monitor to ensure top system performance.","twitter_image":"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/Threads-in-Java-Socialbanner.jpg","twitter_creator":"@eginnovations","twitter_site":"@eginnovations","twitter_misc":{"Written by":"Gokulanand N","Est. reading time":"8 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/#article","isPartOf":{"@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/"},"author":{"name":"Gokulanand N","@id":"https:\/\/www.eginnovations.com\/blog\/#\/schema\/person\/4666a30d6f3450a07b70a253e8a56b1a"},"headline":"Understanding Threads in Java: A Complete Guide","datePublished":"2022-03-11T13:00:11+00:00","dateModified":"2024-08-05T11:49:51+00:00","mainEntityOfPage":{"@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/"},"wordCount":1322,"commentCount":0,"publisher":{"@id":"https:\/\/www.eginnovations.com\/blog\/#organization"},"image":{"@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/#primaryimage"},"thumbnailUrl":"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/Threads-in-Java-Thumbnail.jpg","keywords":["appdynamics","blocked threads","deadlock threads","Dynatrace","Java","Java APM","Java applications","java jmx","Java Monitoring","java multi-threading","Java performance","Java thread","java thread analysis","java thread dump","Java thread vs process","Java Threads","jconsole","jvisual VM","JVM Monitoring","JVM Performance","many threads","new relic","NewRelic","runnable threads","Thread","thread block","thread stack trace","thread vs process","Threads","wait in thread java"],"articleSection":["Java Monitoring"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.eginnovations.com\/blog\/java-threads\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/","url":"https:\/\/www.eginnovations.com\/blog\/java-threads\/","name":"What is Thread in Java? Better Performance | eG Innovations","isPartOf":{"@id":"https:\/\/www.eginnovations.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/#primaryimage"},"image":{"@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/#primaryimage"},"thumbnailUrl":"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/Threads-in-Java-Thumbnail.jpg","datePublished":"2022-03-11T13:00:11+00:00","dateModified":"2024-08-05T11:49:51+00:00","description":"Discover what is thread in Java. Learn its role, types, and management techniques. \u2713 Visit us today to get more about the detailed Java threading guide!","breadcrumb":{"@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.eginnovations.com\/blog\/java-threads\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/#primaryimage","url":"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/Threads-in-Java-Thumbnail.jpg","contentUrl":"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2018\/11\/Threads-in-Java-Thumbnail.jpg","width":362,"height":235},{"@type":"BreadcrumbList","@id":"https:\/\/www.eginnovations.com\/blog\/java-threads\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.eginnovations.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Understanding Threads in Java: A Complete Guide"}]},{"@type":"WebSite","@id":"https:\/\/www.eginnovations.com\/blog\/#website","url":"https:\/\/www.eginnovations.com\/blog\/","name":"eG Innovations","description":"IT Performance Monitoring Insights","publisher":{"@id":"https:\/\/www.eginnovations.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.eginnovations.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.eginnovations.com\/blog\/#organization","name":"eG Innovations","alternateName":"eg innovations","url":"https:\/\/www.eginnovations.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.eginnovations.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2014\/07\/eg-logo-dark-gray1_new.jpg","contentUrl":"https:\/\/www.eginnovations.com\/blog\/wp-content\/uploads\/2014\/07\/eg-logo-dark-gray1_new.jpg","width":362,"height":235,"caption":"eG Innovations"},"image":{"@id":"https:\/\/www.eginnovations.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/eGInnovations","https:\/\/x.com\/eginnovations"]},{"@type":"Person","@id":"https:\/\/www.eginnovations.com\/blog\/#\/schema\/person\/4666a30d6f3450a07b70a253e8a56b1a","name":"Gokulanand N","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.eginnovations.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/38afe2decf1c1bb112f8308de10e1953?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/38afe2decf1c1bb112f8308de10e1953?s=96&d=mm&r=g","caption":"Gokulanand N"},"url":"https:\/\/www.eginnovations.com\/blog\/author\/gokulanand\/"}]}},"modified_by":"eG Innovations","_links":{"self":[{"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/posts\/7504","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/users\/51"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/comments?post=7504"}],"version-history":[{"count":0,"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/posts\/7504\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/media\/22153"}],"wp:attachment":[{"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/media?parent=7504"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/categories?post=7504"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eginnovations.com\/blog\/wp-json\/wp\/v2\/tags?post=7504"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}