From a6ef4b67d112da05c2738191820264983f0a0b5b Mon Sep 17 00:00:00 2001
From: sdhiray7 <sdhiray7@gmail.com>
Date: Wed, 3 Aug 2022 06:06:48 +0530
Subject: [PATCH] BAEL-5608 - Get current stack trace java (#12533)

* Initial commit for Object copy in Java

* review comments commit for Object copy in Java

* Initial commit for parseInt vs valueOf java

* Review comments commit for parseInt vs valueOf java

* Modify readme

* review comments

* build failure

* build failure retry

* build failure retry remove parseInt(java.lang.String,int,int,int)

* build failure add comment

* change examples

* review comments

* review comments 2

* review comments 3

* Initial commit for get current stacktrace

* Remove old files

* Name updates

* Jenkins error

* changes to file name

* Review comments
---
 .../currentstacktrace/DumpStackTraceDemo.java | 18 +++++++
 .../StackTraceUsingThreadDemo.java            | 16 ++++++
 .../StackTraceUsingThrowableDemo.java         | 21 ++++++++
 .../CurrentStacktraceDemoUnitTest.java        | 49 +++++++++++++++++++
 4 files changed, 104 insertions(+)
 create mode 100644 core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/DumpStackTraceDemo.java
 create mode 100644 core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThreadDemo.java
 create mode 100644 core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThrowableDemo.java
 create mode 100644 core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/currentstacktrace/CurrentStacktraceDemoUnitTest.java

diff --git a/core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/DumpStackTraceDemo.java b/core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/DumpStackTraceDemo.java
new file mode 100644
index 0000000000..fb67814312
--- /dev/null
+++ b/core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/DumpStackTraceDemo.java
@@ -0,0 +1,18 @@
+package com.baeldung.exception.currentstacktrace;
+
+public class DumpStackTraceDemo 
+{ 
+    public static void main(String[] args) {
+        methodA(); 
+    } 
+
+    public static void methodA() {
+        try {
+            int num1 = 5/0; // java.lang.ArithmeticException: divide by zero
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+}
diff --git a/core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThreadDemo.java b/core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThreadDemo.java
new file mode 100644
index 0000000000..a681fedd4f
--- /dev/null
+++ b/core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThreadDemo.java
@@ -0,0 +1,16 @@
+package com.baeldung.exception.currentstacktrace;
+
+public class StackTraceUsingThreadDemo {
+
+    public static void main(String[] args) {
+        methodA();
+    }
+
+    public static StackTraceElement[] methodA() {
+        return methodB();
+    }
+
+    public static StackTraceElement[] methodB() {
+        return Thread.currentThread().getStackTrace();
+    }
+}
diff --git a/core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThrowableDemo.java b/core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThrowableDemo.java
new file mode 100644
index 0000000000..fbc08596c6
--- /dev/null
+++ b/core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThrowableDemo.java
@@ -0,0 +1,21 @@
+package com.baeldung.exception.currentstacktrace;
+
+public class StackTraceUsingThrowableDemo {
+
+    public static void main(String[] args) {
+        methodA();
+    }
+
+    public static StackTraceElement[] methodA() {
+        try {
+            methodB();
+        } catch (Throwable t) {
+            return t.getStackTrace();
+        }
+        return null;
+    }
+
+    public static void methodB() throws Throwable {
+        throw new Throwable("A test exception");
+    }
+}
diff --git a/core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/currentstacktrace/CurrentStacktraceDemoUnitTest.java b/core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/currentstacktrace/CurrentStacktraceDemoUnitTest.java
new file mode 100644
index 0000000000..849884204d
--- /dev/null
+++ b/core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/currentstacktrace/CurrentStacktraceDemoUnitTest.java
@@ -0,0 +1,49 @@
+package com.baeldung.exception.currentstacktrace;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import com.baeldung.exception.currentstacktrace.StackTraceUsingThreadDemo;
+import com.baeldung.exception.currentstacktrace.StackTraceUsingThrowableDemo;
+
+public class CurrentStacktraceDemoUnitTest {
+
+    @Test
+    public void whenElementIsFecthedUsingThread_thenCorrectMethodAndClassIsReturned() {
+        StackTraceElement[] stackTrace = new StackTraceUsingThreadDemo().methodA();
+
+        StackTraceElement elementZero = stackTrace[0];
+        assertEquals("java.lang.Thread", elementZero.getClassName());
+        assertEquals("getStackTrace", elementZero.getMethodName());
+
+        StackTraceElement elementOne = stackTrace[1];
+        assertEquals("com.baeldung.exception.currentstacktrace.StackTraceUsingThreadDemo", elementOne.getClassName());
+        assertEquals("methodB", elementOne.getMethodName());
+
+        StackTraceElement elementTwo = stackTrace[2];
+        assertEquals("com.baeldung.exception.currentstacktrace.StackTraceUsingThreadDemo", elementTwo.getClassName());
+        assertEquals("methodA", elementTwo.getMethodName());
+
+        StackTraceElement elementThree = stackTrace[3];
+        assertEquals("com.baeldung.exception.currentstacktrace.CurrentStacktraceDemoUnitTest", elementThree.getClassName());
+        assertEquals("whenElementIsFecthedUsingThread_thenCorrectMethodAndClassIsReturned", elementThree.getMethodName());
+    }
+
+    @Test
+    public void whenElementIsFecthedUsingThrowable_thenCorrectMethodAndClassIsReturned() {
+        StackTraceElement[] stackTrace = new StackTraceUsingThrowableDemo().methodA();
+
+        StackTraceElement elementZero = stackTrace[0];
+        assertEquals("com.baeldung.exception.currentstacktrace.StackTraceUsingThrowableDemo", elementZero.getClassName());
+        assertEquals("methodB", elementZero.getMethodName());
+
+        StackTraceElement elementOne = stackTrace[1];
+        assertEquals("com.baeldung.exception.currentstacktrace.StackTraceUsingThrowableDemo", elementOne.getClassName());
+        assertEquals("methodA", elementOne.getMethodName());
+
+        StackTraceElement elementThree = stackTrace[2];
+        assertEquals("com.baeldung.exception.currentstacktrace.CurrentStacktraceDemoUnitTest", elementThree.getClassName());
+        assertEquals("whenElementIsFecthedUsingThrowable_thenCorrectMethodAndClassIsReturned", elementThree.getMethodName());
+    }
+}