Merge remote-tracking branch 'origin/master'

core-java/src/main/java/com/baeldung/stackoverflowerror/AccountHolder.java

@@ -0,0 +1,8 @@
+package com.baeldung.stackoverflowerror;
+
+public class AccountHolder {
+    private String firstName;
+    private String lastName;
+
+    AccountHolder jointAccountHolder = new AccountHolder();
+}

core-java/src/main/java/com/baeldung/stackoverflowerror/ClassOne.java

@@ -0,0 +1,16 @@
+package com.baeldung.stackoverflowerror;
+
+public class ClassOne {
+    private int oneValue;
+    private ClassTwo clsTwoInstance = null;
+
+    public ClassOne() {
+        oneValue = 0;
+        clsTwoInstance = new ClassTwo();
+    }
+
+    public ClassOne(int oneValue, ClassTwo clsTwoInstance) {
+        this.oneValue = oneValue;
+        this.clsTwoInstance = clsTwoInstance;
+    }
+}

core-java/src/main/java/com/baeldung/stackoverflowerror/ClassTwo.java

@@ -0,0 +1,16 @@
+package com.baeldung.stackoverflowerror;
+
+public class ClassTwo {
+    private int twoValue;
+    private ClassOne clsOneInstance = null;
+
+    public ClassTwo() {
+        twoValue = 10;
+        clsOneInstance = new ClassOne();
+    }
+
+    public ClassTwo(int twoValue, ClassOne clsOneInstance) {
+        this.twoValue = twoValue;
+        this.clsOneInstance = clsOneInstance;
+    }
+}

core-java/src/main/java/com/baeldung/stackoverflowerror/InfiniteRecursionWithTerminationCondition.java

@@ -0,0 +1,7 @@
+package com.baeldung.stackoverflowerror;
+
+public class InfiniteRecursionWithTerminationCondition {
+    public int calculateFactorial(final int number) {
+        return number == 1 ? 1 : number * calculateFactorial(number - 1);
+    }
+}

core-java/src/main/java/com/baeldung/stackoverflowerror/RecursionWithCorrectTerminationCondition.java

@@ -0,0 +1,7 @@
+package com.baeldung.stackoverflowerror;
+
+public class RecursionWithCorrectTerminationCondition {
+    public static int calculateFactorial(final int number) {
+        return number <= 1 ? 1 : number * calculateFactorial(number - 1);
+    }
+}

core-java/src/main/java/com/baeldung/stackoverflowerror/UnintendedInfiniteRecursion.java

@@ -0,0 +1,7 @@
+package com.baeldung.stackoverflowerror;
+
+public class UnintendedInfiniteRecursion {
+    public int calculateFactorial(int number) {
+        return number * calculateFactorial(number - 1);
+    }
+}

core-java/src/test/java/com/baeldung/stackoverflowerror/AccountHolderUnitTest.java

@@ -0,0 +1,10 @@
+package com.baeldung.stackoverflowerror;
+
+import org.junit.Test;
+
+public class AccountHolderUnitTest {
+    @Test(expected = StackOverflowError.class)
+    public void whenInstanciatingAccountHolder_thenThrowsException() {
+        AccountHolder holder = new AccountHolder();
+    }
+}

core-java/src/test/java/com/baeldung/stackoverflowerror/CyclicDependancyUnitTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.stackoverflowerror;
+
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
+public class CyclicDependancyUnitTest {
+    @Test
+    public void whenInstanciatingClassOne_thenThrowsException() {
+        try {
+            ClassOne obj = new ClassOne();
+            fail();
+        } catch (StackOverflowError soe) {
+            soe.printStackTrace();
+        }
+    }
+}

core-java/src/test/java/com/baeldung/stackoverflowerror/InfiniteRecursionWithTerminationConditionUnitTest.java

@@ -0,0 +1,37 @@
+package com.baeldung.stackoverflowerror;
+
+import static junit.framework.TestCase.assertEquals;
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
+public class InfiniteRecursionWithTerminationConditionUnitTest {
+    @Test
+    public void givenPositiveIntNoOne_whenCalcFact_thenThrowsException() {
+        int numToCalcFactorial = 1;
+        InfiniteRecursionWithTerminationCondition irtc = new InfiniteRecursionWithTerminationCondition();
+
+        assertEquals(1, irtc.calculateFactorial(numToCalcFactorial));
+    }
+
+    @Test
+    public void givenPositiveIntGtOne_whenCalcFact_thenThrowsException() {
+        int numToCalcFactorial = 5;
+        InfiniteRecursionWithTerminationCondition irtc = new InfiniteRecursionWithTerminationCondition();
+
+        assertEquals(120, irtc.calculateFactorial(numToCalcFactorial));
+    }
+
+    @Test
+    public void givenNegativeInt_whenCalcFact_thenThrowsException() {
+        try {
+            int numToCalcFactorial = -1;
+            InfiniteRecursionWithTerminationCondition irtc = new InfiniteRecursionWithTerminationCondition();
+
+            irtc.calculateFactorial(numToCalcFactorial);
+            fail();
+        } catch (StackOverflowError soe) {
+            soe.printStackTrace();
+        }
+    }
+}

core-java/src/test/java/com/baeldung/stackoverflowerror/UnintendedInfiniteRecursionUnitTest.java

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+package com.baeldung.stackoverflowerror;
+
+import org.junit.Test;
+
+public class UnintendedInfiniteRecursionUnitTest {
+    @Test(expected = StackOverflowError.class)
+    public void givenPositiveIntNoOne_whenCalFact_thenThrowsException() {
+        int numToCalcFactorial = 1;
+        UnintendedInfiniteRecursion uir = new UnintendedInfiniteRecursion();
+
+        uir.calculateFactorial(numToCalcFactorial);
+    }
+
+    @Test(expected = StackOverflowError.class)
+    public void givenPositiveIntGtOne_whenCalcFact_thenThrowsException() {
+        int numToCalcFactorial = 2;
+        UnintendedInfiniteRecursion uir = new UnintendedInfiniteRecursion();
+
+        uir.calculateFactorial(numToCalcFactorial);
+    }
+
+    @Test(expected = StackOverflowError.class)
+    public void givenNegativeInt_whenCalcFact_thenThrowsException() {
+        int numToCalcFactorial = -1;
+        UnintendedInfiniteRecursion uir = new UnintendedInfiniteRecursion();
+
+        uir.calculateFactorial(numToCalcFactorial);
+    }
+}