first commit

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyClass.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyClass {
+
+    private int myField1 = 10;
+    private int myField2;
+
+    public MyClass() {
+        //uncomment this to see the supertype compiler error:
+        //this(myField1);
+    }
+
+    public MyClass(int i) {
+        myField2 = i;
+    }
+}

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyClassSolutionI.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyClassSolutionI {
+
+    private int myField1 = 10;
+    private int myField2;
+
+    public MyClassSolutionI() {
+        myField2 = myField1;
+    }
+
+    public MyClassSolutionI(int i) {
+        myField2 = i;
+    }
+}

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyClassSolutionII.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyClassSolutionII {
+
+    private int myField1 = 10;
+    private int myField2;
+
+    public MyClassSolutionII() {
+        setupMyFields(myField1);
+    }
+
+    public MyClassSolutionII(int i) {
+        setupMyFields(i);
+    }
+
+    private void setupMyFields(int i) {
+        myField2 = i;
+    }
+}

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyClassSolutionIII.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyClassSolutionIII {
+
+    private static final int SOME_CONSTANT = 10;
+    private int myField2;
+
+    public MyClassSolutionIII() {
+        this(SOME_CONSTANT);
+    }
+
+    public MyClassSolutionIII(int i) {
+        myField2 = i;
+    }
+}

core-java-lang-oop-2/src/main/java/com/baeldung/supertypecompilerexception/MyException.java

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+package com.baeldung.supertypecompilerexception;
+
+public class MyException extends RuntimeException {
+    private int errorCode = 0;
+
+    public MyException(String message) {
+        //uncomment this to see the supertype compiler error:
+        //super(message + getErrorCode());
+    }
+
+    public int getErrorCode() {
+        return errorCode;
+    }
+}

core-java-lang-oop-2/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.springframework" level="WARN" />
+    <logger name="org.springframework.transaction" level="WARN" />
+
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

core-java-lang-oop-2/src/test/resources/.gitignore

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+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear