From 8314651a0121b58f1124b89dc3b2d61df5c8f71e Mon Sep 17 00:00:00 2001
From: Kent <kent.yuan@Gmail.com>
Date: Sat, 21 Dec 2024 01:00:36 +0100
Subject: [PATCH] [null-in-exception.msg] stack trace

---
 .../core-java-exceptions-5/README.md          |   5 +
 .../core-java-exceptions-5/pom.xml            |  15 +++
 .../ExceptionGetMessageNullUnitTest.java      | 110 ++++++++++++++++++
 core-java-modules/pom.xml                     |   1 +
 4 files changed, 131 insertions(+)
 create mode 100644 core-java-modules/core-java-exceptions-5/README.md
 create mode 100644 core-java-modules/core-java-exceptions-5/pom.xml
 create mode 100644 core-java-modules/core-java-exceptions-5/src/test/java/com/baeldung/exception/nullmessage/ExceptionGetMessageNullUnitTest.java

diff --git a/core-java-modules/core-java-exceptions-5/README.md b/core-java-modules/core-java-exceptions-5/README.md
new file mode 100644
index 000000000000..c513bf4de29c
--- /dev/null
+++ b/core-java-modules/core-java-exceptions-5/README.md
@@ -0,0 +1,5 @@
+## Core Java Exceptions
+
+This module contains articles about core java exceptions
+
+### Relevant articles:
diff --git a/core-java-modules/core-java-exceptions-5/pom.xml b/core-java-modules/core-java-exceptions-5/pom.xml
new file mode 100644
index 000000000000..4e49609a9739
--- /dev/null
+++ b/core-java-modules/core-java-exceptions-5/pom.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-exceptions-5</artifactId>
+    <packaging>jar</packaging>
+    <name>core-java-exceptions-5</name>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+</project>
diff --git a/core-java-modules/core-java-exceptions-5/src/test/java/com/baeldung/exception/nullmessage/ExceptionGetMessageNullUnitTest.java b/core-java-modules/core-java-exceptions-5/src/test/java/com/baeldung/exception/nullmessage/ExceptionGetMessageNullUnitTest.java
new file mode 100644
index 000000000000..fcd111486143
--- /dev/null
+++ b/core-java-modules/core-java-exceptions-5/src/test/java/com/baeldung/exception/nullmessage/ExceptionGetMessageNullUnitTest.java
@@ -0,0 +1,110 @@
+package com.baeldung.exception.nullmessage;
+
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+class Team {
+
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}
+
+class Player {
+
+    private static Logger LOG = LoggerFactory.getLogger(Player.class);
+    private String name;
+    private Team team;
+
+    public Player(String name) {
+        this.name = name;
+    }
+
+    public void output() {
+        try {
+            if (team != null) {
+                LOG.info("Player: {}, Team: {}", name.toUpperCase(), team.getName().toUpperCase());
+            } else {
+                throw new IllegalArgumentException("Play's team is null");
+            }
+        } catch (Exception e) {
+            LOG.error("Error occurred." + e.getMessage());
+        }
+    }
+
+    public void outputWithStackTrace() {
+        try {
+            if (team != null) {
+                LOG.info("Player: {}, Team: {}", name.toUpperCase(), team.getName().toUpperCase());
+            } else {
+                throw new IllegalArgumentException("Play's team is null");
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    public void outputWithStackTraceLog() {
+        try {
+            if (team != null) {
+                LOG.info("Player: {}, Team: {}", name.toUpperCase(), team.getName().toUpperCase());
+            } else {
+                throw new IllegalArgumentException("Play's team is null");
+            }
+        } catch (Exception e) {
+            LOG.error("Error occurred.", e);
+        }
+    }
+
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Team getTeam() {
+        return team;
+    }
+
+    public void setTeam(Team team) {
+        this.team = team;
+    }
+
+}
+
+public class ExceptionGetMessageNullUnitTest {
+
+    @Test
+    void whenCallingPlayerOutput_thenGetExceptionWithNullMessage() {
+        Player kai = new Player("Kai");
+        kai.setTeam(new Team());
+
+        kai.output();
+    }
+
+    @Test
+    void whenCallingPlayerOutputWithStackTrace_thenGetStackTrace() {
+        Player kai = new Player("Kai");
+        kai.setTeam(new Team());
+
+        kai.outputWithStackTrace();
+    }
+
+    @Test
+    void whenCallingPlayerOutputWithStackTraceLog_thenGetStackTrace() {
+        Player kai = new Player("Kai");
+        kai.setTeam(new Team());
+
+        kai.outputWithStackTraceLog();
+    }
+}
diff --git a/core-java-modules/pom.xml b/core-java-modules/pom.xml
index 38c00570a6e8..a953e2cebea7 100644
--- a/core-java-modules/pom.xml
+++ b/core-java-modules/pom.xml
@@ -128,6 +128,7 @@
         <module>core-java-exceptions-2</module>
         <module>core-java-exceptions-3</module>
         <!-- <module>core-java-exceptions-4</module> --> <!-- failing after upgrade to jdk21 -->
+        <module>core-java-exceptions-5</module>
         <module>core-java-function</module>
         <module>core-java-functional</module>
         <module>core-java-hex</module>