BAEL-2516 catching errors in catch block (#6761)

core-java-lang/src/main/java/com/baeldung/error/ErrorGenerator.java

@@ -0,0 +1,15 @@
+package com.baeldung.error;
+
+public class ErrorGenerator {
+    public void throwException() throws Exception {
+        throw new Exception("checked");
+    }
+
+    public void throwRuntimeException() {
+        throw new RuntimeException("unchecked");
+    }
+
+    public void throwError() {
+        throw new Error("unchecked");
+    }
+}

core-java-lang/src/test/java/com/baeldung/error/ErrorGeneratorUnitTest.java

@@ -0,0 +1,51 @@
+package com.baeldung.error;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+public class ErrorGeneratorUnitTest {
+
+    private ErrorGenerator errorGenerator;
+
+    @Before
+    public void setUp() {
+        errorGenerator = new ErrorGenerator();
+    }
+
+    @Test
+    public void whenCheckedException_thenIsCaughtByCatchException() {
+        try {
+            errorGenerator.throwException();
+        } catch (Exception e) {
+            // caught! -> test pass
+        }
+    }
+
+    @Test
+    public void whenUncheckedException_thenIsCaughtByCatchException() {
+        try {
+            errorGenerator.throwRuntimeException();
+        } catch (Exception e) {
+            // caught! -> test pass
+        }
+    }
+
+    @Test(expected = Error.class)
+    public void whenError_thenIsNotCaughtByCatchException() {
+        try {
+            errorGenerator.throwError();
+        } catch (Exception e) {
+            Assert.fail(); // errors are not caught by catch exception
+        }
+    }
+
+    @Test
+    public void whenError_thenIsCaughtByCatchError() {
+        try {
+            errorGenerator.throwError();
+        } catch (Error e) {
+            // caught! -> test pass
+        }
+    }
+}