Java.lang.Thread.getAllStackTraces() Method

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Description

The java.lang.Thread.getAllStackTraces() method returns a map of stack traces for all live threads. The map keys are threads and each map value is an array of StackTraceElement that represents the stack dump of the corresponding Thread.

Declaration

Following is the declaration for java.lang.Thread.getAllStackTraces() method

public static Map<Thread,StackTraceElement[]> getAllStackTraces()

Parameters

NA

Return Value

This method returns a Map from Thread to an array of StackTraceElement that represents the stack trace of the corresponding thread.

Exception

SecurityException − if a security manager exists and its checkPermission method doesn't allow getting the stack trace of thread.

Example

The following example shows the usage of java.lang.Thread.getAllStackTraces() method.

package com.tutorialspoint;

import java.lang.*;
import java.util.*;

public class ThreadDemo implements Runnable {
  
   public void run() {
      System.out.println("This is run() method");
   }
  
   public static void main(String args[]) {
      
      ThreadDemo trace = new ThreadDemo();
      Thread t = new Thread(trace);
    
      // this will call run() method
      t.start();
    
      // returns a map of stack traces
      Map m = Thread.getAllStackTraces();
   }
} 

Let us compile and run the above program, this will produce the following result −

This is run() method