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

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();
+        }
+    }
+
+}

core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThreadDemo.java

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+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();
+    }
+}

core-java-modules/core-java-exceptions-4/src/main/java/com/baeldung/exception/currentstacktrace/StackTraceUsingThrowableDemo.java

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+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");
+    }
+}

core-java-modules/core-java-exceptions-4/src/test/java/com/baeldung/exception/currentstacktrace/CurrentStacktraceDemoUnitTest.java

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+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());
+    }
+}