How to access each stack element of StackWalker in Java 9?

Java 9 introduced StackWalker API as Thread.getStackTrace() or Throwable Alternatives to .getStackTrace() and SecurityManager.getClassContext() . The goal of this API is a mechanism to traverse and materialize the required stack frames, allowing efficient deferred access to additional stack frames when needed.

If we need to access each stack element of the exception stack trace, then we can use the getStackTrace() method of the Throwable class. It returns an array of StackTraceElements.

Example

import java.util.*;

<strong>// Test1 class
</strong>class Test1 {
   public void test() throws Exception {
      Test2 test2 = new Test2();
      test2.test();
   }
}

<strong>// Test2 class</strong>
class Test2 {
   public void test() throws Exception {
      System.out.println(1/0);
   }
}

<strong>// Main class</strong>
public class StackWalkerTest {
   public static void main(String args[]) {
      Test1 test1 = new Test1();
      try {
         test1.test();
      } catch(Exception e) {
         <strong>Arrays.stream</strong>(e.<strong>getStackTrace()</strong>).<strong>forEach</strong>(System.out::println);
      }
   }
}

Output

<strong>Test2.test(StackWalkerTest.java:14)
Test1.test(StackWalkerTest.java:7)
StackWalkerTest.main(StackWalkerTest.java:23)</strong>

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