Further prepare skeleton of test classes and implement first tips.

Author: kosi2801

.gitignore

@@ -1,6 +1,5 @@
 *.class
 
 # Package Files #
-*.jar
-*.war
-*.ear
+#*.war
+#*.ear

JavaTips/.classpath

@@ -3,5 +3,7 @@
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="src" path="test"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
+	<classpathentry kind="lib" path="ext-lib/commons-lang3-3.2.1.jar"/>
 	<classpathentry kind="output" path="target"/>
 </classpath>

JavaTips/ext-lib/commons-lang3-3.2.1.jar

@@ -1,12 +1,35 @@
 package com.kosi2801.javatips;
 
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #1: Use StringBuilder instead of StringBuffer
  * 
  * @author kosi2801
- * @see http://kosi2801.freepgs.com/2010/04/17/java_tip_1_use_stringbuilder_instead_of_stringbuffer.html
+ * @see http://kosi2801.freepgs.com/2010/04/17/
+ *      java_tip_1_use_stringbuilder_instead_of_stringbuffer.html
  * 
  */
 public class Tip01UseStringBuilderForStringBuffer {
 
+    /**
+     * @deprecated Using StringBuffer is discouraged. Use StringBuilder instead.
+     *             Use StringBuffer only if synchronisation is required.
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        StringBuffer str = new StringBuffer();
+        str.append("foo");
+        String x = str.toString();
+    }
+
+    @Test
+    public void after_1() {
+        StringBuilder str = new StringBuilder();
+        str.append("foo");
+        String x = str.toString();
+    }
+
 }

JavaTips/test/com/kosi2801/javatips/Tip01UseStringBuilderForStringBuffer.java

@@ -1,12 +1,39 @@
 package com.kosi2801.javatips;
 
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #2: Use StringBuilder for String concatenation
  * 
  * @author kosi2801
- * @see http://kosi2801.freepgs.com/2010/04/23/java_tip_2_use_stringbuilder_for_string_concatenation.html
+ * @see http://kosi2801.freepgs.com/2010/04/23/
+ *      java_tip_2_use_stringbuilder_for_string_concatenation.html
  * 
  */
 public class Tip02UseStringBuilderForStringConcats {
 
+    /**
+     * @deprecated Unbuffered String concatenation is very slow as it requires
+     *             multiple String instances and copying contents. Use
+     *             StringBuilder instead.
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        String test = "";
+        for (int i = 0; i < 50000; i++) {
+            test += "abc";
+        }
+    }
+
+    @Test
+    public void after_1() {
+        StringBuilder testBuilder = new StringBuilder();
+        for (int i = 0; i < 50000; i++) {
+            testBuilder.append("abc");
+        }
+        String test = testBuilder.toString();
+    }
+
 }

JavaTips/test/com/kosi2801/javatips/Tip02UseStringBuilderForStringConcats.java

@@ -1,12 +1,65 @@
 package com.kosi2801.javatips;
 
+import org.apache.commons.lang3.StringUtils;
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #3: Use Apache Commons StringUtils for String checks
  * 
  * @author kosi2801
- * @see http://kosi2801.freepgs.com/2010/05/13/java_tip_3_use_apache_commons_stringutils_for_string_checks.html
+ * @see http://kosi2801.freepgs.com/2010/05/13/
+ *      java_tip_3_use_apache_commons_stringutils_for_string_checks.html
  * 
  */
 public class Tip03UseStringUtilsForStringChecks {
 
+    /**
+     * @deprecated Checking Strings manually requires additional null-checks, is
+     *             not very readable and prone for errors when refactoring. Use
+     *             StringUtils instead.
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        String str = "";
+
+        // Check 1
+        if (str != null && !str.equals("")) { /* */
+        }
+
+        // Check 2
+        if (str != null && !str.trim().equals("")) { /* */
+        }
+
+        // Check 3
+        if ("".equals(str)) { /* */
+        }
+
+        // Check 4
+        if (str == null || "".equals(str.trim())) { /* */
+        }
+    }
+
+    @Test
+    public void after_1() {
+        String str = "";
+
+        // Check 1
+        if (StringUtils.isNotEmpty(str)) { /* */
+        }
+
+        // Check 2
+        if (StringUtils.isNotBlank(str)) { /* */
+        }
+
+        // Check 3
+        if (StringUtils.isEmpty(str)) { /* */
+        }
+
+        // Check 4
+        if (StringUtils.isBlank(str)) { /* */
+        }
+    }
+
 }

JavaTips/test/com/kosi2801/javatips/Tip03UseStringUtilsForStringChecks.java

@@ -1,5 +1,9 @@
 package com.kosi2801.javatips;
 
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #4: Use implicit NULL checks on constants
  * 
@@ -9,4 +13,19 @@
  */
 public class Tip04UseImplicitNullChecksWithConstants {
 
+    /**
+     * @deprecated bla
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        fail("not yet implemented");
+    }
+    
+    @Test
+    public void after_1() {
+        fail("not yet implemented");
+    }
+
 }

JavaTips/test/com/kosi2801/javatips/Tip04UseImplicitNullChecksWithConstants.java

@@ -1,5 +1,9 @@
 package com.kosi2801.javatips;
 
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #5: Use Apache Commons DateUtils when dealing with dates
  * 
@@ -9,4 +13,19 @@
  */
 public class Tip05UseDateUtilsForDateCalculations {
 
+    /**
+     * @deprecated bla
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        fail("not yet implemented");
+    }
+    
+    @Test
+    public void after_1() {
+        fail("not yet implemented");
+    }
+
 }

JavaTips/test/com/kosi2801/javatips/Tip05UseDateUtilsForDateCalculations.java

@@ -1,5 +1,9 @@
 package com.kosi2801.javatips;
 
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #6: Use the for-each of Java5 whenever possible
  * 
@@ -9,4 +13,19 @@
  */
 public class Tip06UseJava5ForEach {
 
+    /**
+     * @deprecated bla
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        fail("not yet implemented");
+    }
+    
+    @Test
+    public void after_1() {
+        fail("not yet implemented");
+    }
+
 }

JavaTips/test/com/kosi2801/javatips/Tip06UseJava5ForEach.java

@@ -1,5 +1,9 @@
 package com.kosi2801.javatips;
 
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #7: Minimize Map processing
  * 
@@ -9,4 +13,19 @@
  */
 public class Tip07MinimizeMapProcessing {
 
+    /**
+     * @deprecated bla
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        fail("not yet implemented");
+    }
+    
+    @Test
+    public void after_1() {
+        fail("not yet implemented");
+    }
+
 }

JavaTips/test/com/kosi2801/javatips/Tip07MinimizeMapProcessing.java

@@ -1,5 +1,9 @@
 package com.kosi2801.javatips;
 
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #8: Use StringUtils for concatenating Strings from Arrays or Lists
  * 
@@ -9,4 +13,19 @@
  */
 public class Tip08UseStringUtilsForStringArrayConcatenations {
 
+    /**
+     * @deprecated bla
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        fail("not yet implemented");
+    }
+    
+    @Test
+    public void after_1() {
+        fail("not yet implemented");
+    }
+
 }

JavaTips/test/com/kosi2801/javatips/Tip08UseStringUtilsForStringArrayConcatenations.java

@@ -1,5 +1,9 @@
 package com.kosi2801.javatips;
 
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #9: Use CollectionUtils for evaluation and manipulation of Collections
  * 
@@ -9,4 +13,19 @@
  */
 public class Tip09UseCollectionUtilsForCollectionManipulation {
 
+    /**
+     * @deprecated bla
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        fail("not yet implemented");
+    }
+    
+    @Test
+    public void after_1() {
+        fail("not yet implemented");
+    }
+
 }

JavaTips/test/com/kosi2801/javatips/Tip09UseCollectionUtilsForCollectionManipulation.java

@@ -1,5 +1,9 @@
 package com.kosi2801.javatips;
 
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+
 /**
  * Example for the Java Tip #10: The instanceof-operator is null-safe
  * 
@@ -9,4 +13,19 @@
  */
 public class Tip10UseInstanceOfOperatorForNullCheck {
 
+    /**
+     * @deprecated bla
+     * @see after_1()
+     */
+    @Test
+    @Deprecated
+    public void before_1() {
+        fail("not yet implemented");
+    }
+    
+    @Test
+    public void after_1() {
+        fail("not yet implemented");
+    }
+
 }