java.lang.management.ThreadInfo Class in Java Last Updated : 20 Jul, 2022 Comments Improve Suggest changes Like Article Like Report java.lang.management.ThreadInfo class contains methods to get information about a thread. This information includes: Thread IDThread NameState of the ThreadStack trace of the ThreadThe object upon which the Thread is blockedList of object monitors that are blocked by the ThreadList of ownable synchronizers blocked by the ThreadNumber of times the Thread had been blockedThe elapsed time for which the Thread had been blocked Syntax: Class declaration public class ThreadInfo extends Object The methods of this class are as follows: MethodsDescriptionThreadInfo from(CompositeData data)This method is used to represent this composite data as a ThreadInfo object.getBlockedCount()This method is used to know how many times the thread associated with this ThreadInfo object had been blocked to enter a monitor or reenter a monitor.getBlockedTime()This method is used to know for many milliseconds the thread associated with this ThreadInfo object had been blocked to enter or reenter a monitor.getLockedMonitors()This method is used to get a list of 'MonitorInfo' objects, which are currently locked by the thread associated with this ThreadInfo object.getLockedSynchronizers()This method is used to get a list of 'ownable' synchronizers, which are currently locked by the thread associated with this ThreadInfo object.getLockInfo()This method is used to get information about the object for which the thread associated with this ThreadInfo object is blocked waiting. It returns a 'LockInfo' object representing the information.getLockName()This method is used to get the name of the object for which the thread associated with this ThreadInfo object is blocked waiting.getLockOwnerId()This method is used to get the ID of the thread which owns the object that is blocking this thread.getLockOwnerName()This method is used to get the Name of the thread which owns the object that is blocking this thread.getStackTrace()This method is used to get the stack trace of a Thread.getThreadId()This method is used to get the ID of a Thread.getThreadName()This method is used to get the name of a Thread.getThreadState()This method is used to get the state of a Thread.getWaitedCount()This method is used to know how many times the thread associated with this ThreadInfo object has waited for notification.getWaitedTime()This method is used to know for many milliseconds the thread associated with this ThreadInfo object has waited for notification.isInNative()This method is used to determine whether this ThreadInfo object is executing the native code via the java native interface or not.isSuspended()This method is used to determine whether the Thread associated with this ThreadInfo object is suspended or not.toString()This method is used to get string representation of the given ThreadInfo object. Implementation: Example 1: Creating a new ThreadInfo object Java // Java Program to demonstrate ThreadInfo Class // Importing required libraries import java.lang.management.ManagementFactory; import java.lang.management.ThreadInfo; // Main class public class GFG { // main driver method public static void main(String[] args) { // Try block to check for exceptions try { // Creating a new thread by // creating an object of Thread class Thread thread = new Thread(); // running the thread using run() method thread.run(); // Getting thread id using getId() method long id = thread.getId(); // Creating a new ThreadInfo object // using that id ThreadInfo info = ManagementFactory.getThreadMXBean() .getThreadInfo(id); // Print and display message on the console System.out.println( "ThreadInfo object created successfully"); } // Catch block to handle the exceptions catch (Exception e) { // print the line number where exception occurs e.printStackTrace(); } } } Output: ThreadInfo object created successfully Example 2: Common-cleaner thread using ThreadInfo class Java // Java Program to demonstrate ThreadInfo Class // Importing required libraries import java.lang.management.ManagementFactory; import java.lang.management.ThreadInfo; // Main class public class GFG { // Main driver method public static void main(String[] args) { // try block to check for exceptions try { long id = 10; // Creating a new ThreadInfo object // using this id ThreadInfo info = ManagementFactory.getThreadMXBean() .getThreadInfo(id); // Printing information about the thread // 1. Printing thread id System.out.println("Thread ID: " + info.getThreadId()); // 2. Printing Thread Name System.out.println("Thread Name: " + info.getThreadName()); // 3. Printing thread State System.out.println("Thread State: " + info.getThreadState()); // 4. Printing thread waited count System.out.println("Waited count: " + info.getWaitedCount()); // 5. Printing thread waited time System.out.println("Waited time: " + info.getWaitedTime()); // 6. Printing how many times this thread had // been blocked System.out.println("Times blocked: " + info.getBlockedCount()); // 7. Printing Blocked duration System.out.println("Blocked duration: " + info.getBlockedTime()); // 8. Printing Locked Monitors System.out.println("Locked Monitors: " + info.getLockedMonitors()); // 9. Printing Locked Owner's ID System.out.println("Locked Owner's ID: " + info.getLockOwnerId()); // 10. Printing Locked Owner's Name System.out.println("Locked Owner's Name: " + info.getLockOwnerName()); } // Catch block to handle the exceptions catch (Exception e) { // Print the line number where exception occurred e.printStackTrace(); } } } Output: Thread ID: 10 Thread Name: Common-Cleaner Thread State: TIMED_WAITING Waited count: 1 Waited time: -1 Times blocked: 0 Blocked duration: -1 Locked Monitors: [Ljava.lang.management.MonitorInfo;@15aeb7ab Locked Owner's ID: -1 Locked Owner's Name: null Comment More infoAdvertise with us Next Article Introduction to Java A abhinavjain194 Follow Improve Article Tags : Java Java-lang package Practice Tags : Java Similar Reads Java Tutorial Java is a high-level, object-oriented programming language used to build web apps, mobile applications, and enterprise software systems. 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