[JAVA-9021] Clean up uncommitted artifacts (#11754)

apache-poi/.gitignore

@@ -1,3 +1,5 @@
 *.docx
 temp.xls
 temp.xlsx
+
+CellStyleTest_output.xlsx

core-java-modules/core-java-lang-math-2/.gitignore

@@ -2,3 +2,5 @@
 .settings/
 .classpath
 .project
+
+*.log

core-java-modules/core-java-serialization/src/test/java/com/baeldung/externalizable/ExternalizableUnitTest.java

@@ -1,14 +1,29 @@
 package com.baeldung.externalizable;
 
+import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 import java.io.*;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
 public class ExternalizableUnitTest {
 
-    private final static String OUTPUT_FILE = "externalizable.txt";
+    private final static String OUTPUT_FILE_NAME = "externalizable.txt";
+
+    @Rule
+    public TemporaryFolder tempFolder = new TemporaryFolder();
+
+    private File outputFile;
+
+    @Before
+    public void setUp() throws Exception {
+        outputFile = tempFolder.newFile(OUTPUT_FILE_NAME);
+    }
 
     @Test
     public void whenSerializing_thenUseExternalizable() throws IOException, ClassNotFoundException {
@@ -18,7 +33,7 @@ public class ExternalizableUnitTest {
         c.setCode(374);
         c.setName("Armenia");
 
-        FileOutputStream fileOutputStream = new FileOutputStream(OUTPUT_FILE);
+        FileOutputStream fileOutputStream = new FileOutputStream(outputFile);
         ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream);
         c.writeExternal(objectOutputStream);
 
@@ -26,7 +41,7 @@ public class ExternalizableUnitTest {
         objectOutputStream.close();
         fileOutputStream.close();
 
-        FileInputStream fileInputStream = new FileInputStream(OUTPUT_FILE);
+        FileInputStream fileInputStream = new FileInputStream(outputFile);
         ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
 
         Country c2 = new Country();
@@ -35,8 +50,8 @@ public class ExternalizableUnitTest {
         objectInputStream.close();
         fileInputStream.close();
 
-        assertTrue(c2.getCode() == c.getCode());
+        assertEquals(c2.getCode(), c.getCode());
-        assertTrue(c2.getName().equals(c.getName()));
+        assertEquals(c2.getName(), c.getName());
     }
 
     @Test
@@ -49,7 +64,7 @@ public class ExternalizableUnitTest {
         r.setClimate("Mediterranean");
         r.setPopulation(120.000);
 
-        FileOutputStream fileOutputStream = new FileOutputStream(OUTPUT_FILE);
+        FileOutputStream fileOutputStream = new FileOutputStream(outputFile);
         ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream);
         r.writeExternal(objectOutputStream);
 
@@ -57,7 +72,7 @@ public class ExternalizableUnitTest {
         objectOutputStream.close();
         fileOutputStream.close();
 
-        FileInputStream fileInputStream = new FileInputStream(OUTPUT_FILE);
+        FileInputStream fileInputStream = new FileInputStream(outputFile);
         ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
 
         Region r2 = new Region();
@@ -66,6 +81,6 @@ public class ExternalizableUnitTest {
         objectInputStream.close();
         fileInputStream.close();
 
-        assertTrue(r2.getPopulation() == null);
+        assertNull(r2.getPopulation());
     }
 }

core-java-modules/core-java-serialization/src/test/java/com/baeldung/serialization/PersonUnitTest.java

@@ -1,36 +1,54 @@
 package com.baeldung.serialization;
 
+import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
+import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 public class PersonUnitTest {
 
+    @Rule
+    public TemporaryFolder tempFolder = new TemporaryFolder();
+
+    private File outputFile;
+
+    private File outputFile2;
+
+    @Before
+    public void setUp() throws Exception {
+        outputFile = tempFolder.newFile("yourfile.txt");
+        outputFile2 = tempFolder.newFile("yourfile2.txt");
+    }
+
     @Test
     public void whenSerializingAndDeserializing_ThenObjectIsTheSame() throws IOException, ClassNotFoundException {
         Person p = new Person();
         p.setAge(20);
         p.setName("Joe");
 
-        FileOutputStream fileOutputStream = new FileOutputStream("yofile.txt");
+        FileOutputStream fileOutputStream = new FileOutputStream(outputFile);
         ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream);
         objectOutputStream.writeObject(p);
         objectOutputStream.flush();
         objectOutputStream.close();
 
-        FileInputStream fileInputStream = new FileInputStream("yofile.txt");
+        FileInputStream fileInputStream = new FileInputStream(outputFile);
         ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
         Person p2 = (Person) objectInputStream.readObject();
         objectInputStream.close();
 
-        assertTrue(p2.getAge() == p.getAge());
+        assertEquals(p2.getAge(), p.getAge());
-        assertTrue(p2.getName().equals(p.getName()));
+        assertEquals(p2.getName(), p.getName());
     }
 
     @Test
@@ -46,19 +64,19 @@ public class PersonUnitTest {
         e.setPerson(p);
         e.setAddress(a);
 
-        FileOutputStream fileOutputStream = new FileOutputStream("yofile2.txt");
+        FileOutputStream fileOutputStream = new FileOutputStream(outputFile2);
         ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream);
         objectOutputStream.writeObject(e);
         objectOutputStream.flush();
         objectOutputStream.close();
 
-        FileInputStream fileInputStream = new FileInputStream("yofile2.txt");
+        FileInputStream fileInputStream = new FileInputStream(outputFile2);
         ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
         Employee e2 = (Employee) objectInputStream.readObject();
         objectInputStream.close();
 
-        assertTrue(e2.getPerson().getAge() == e.getPerson().getAge());
+        assertEquals(e2.getPerson().getAge(), e.getPerson().getAge());
-        assertTrue(e2.getAddress().getHouseNumber() == (e.getAddress().getHouseNumber()));
+        assertEquals(e2.getAddress().getHouseNumber(), (e.getAddress().getHouseNumber()));
     }
 
 }

core-java-modules/core-java-serialization/src/test/java/com/baeldung/serialization/SerializationUnitTest.java

@@ -4,6 +4,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -13,17 +14,32 @@ import java.io.ObjectOutputStream;
 import java.io.Serializable;
 
 import org.apache.commons.lang3.SerializationUtils;
+import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 
 import com.baeldung.util.MySerializationUtils;
+import org.junit.rules.TemporaryFolder;
 
 public class SerializationUnitTest {
 
+    private final static String OUTPUT_FILE_NAME = "yourfile.txt";
+
+    @Rule
+    public TemporaryFolder tempFolder = new TemporaryFolder();
+
+    private File outputFile;
+
+    @Before
+    public void setUp() throws Exception {
+        outputFile = tempFolder.newFile(OUTPUT_FILE_NAME);
+    }
+
     @Test(expected = NotSerializableException.class)
     public void whenSerializing_ThenThrowsError() throws IOException {
         Address address = new Address();
         address.setHouseNumber(10);
-        FileOutputStream fileOutputStream = new FileOutputStream("yofile.txt");
+        FileOutputStream fileOutputStream = new FileOutputStream(outputFile);
         try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream)) {
             objectOutputStream.writeObject(address);
         }
@@ -35,12 +51,12 @@ public class SerializationUnitTest {
         p.setAge(20);
         p.setName("Joe");
 
-        FileOutputStream fileOutputStream = new FileOutputStream("yofile.txt");
+        FileOutputStream fileOutputStream = new FileOutputStream(outputFile);
         try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream)) {
             objectOutputStream.writeObject(p);
         }
 
-        FileInputStream fileInputStream = new FileInputStream("yofile.txt");
+        FileInputStream fileInputStream = new FileInputStream(outputFile);
         try (ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream)) {
             Person p2 = (Person) objectInputStream.readObject();
             assertEquals(p2.getAge(), p.getAge());