diff --git a/test/fr/devinsy/util/strings/StringListTest.java b/test/fr/devinsy/util/strings/StringListTest.java
index 4441ebb..dbfa7fe 100644
--- a/test/fr/devinsy/util/strings/StringListTest.java
+++ b/test/fr/devinsy/util/strings/StringListTest.java
@@ -34,7 +34,7 @@ import org.junit.Test;
  */
 public class StringListTest
 {
-	static protected org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger(StringListTest.class);
+	public final org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger(StringListTest.class);
 
 	/**
 	 * Before.
@@ -53,7 +53,7 @@ public class StringListTest
 	public void testCharAt01()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -72,7 +72,7 @@ public class StringListTest
 		Assert.assertEquals(target, 'l');
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -82,7 +82,7 @@ public class StringListTest
 	public void testCharAt02()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -105,7 +105,7 @@ public class StringListTest
 		Assert.assertEquals('l', target);
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -115,7 +115,7 @@ public class StringListTest
 	public void testCharAtException01()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -126,7 +126,7 @@ public class StringListTest
 		Assert.assertEquals('a', target);
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -136,7 +136,7 @@ public class StringListTest
 	public void testCharAtException02()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -147,7 +147,7 @@ public class StringListTest
 		Assert.assertEquals('a', target);
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -157,7 +157,7 @@ public class StringListTest
 	public void testCharAtException03()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -168,7 +168,7 @@ public class StringListTest
 		Assert.assertEquals('a', target);
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -178,7 +178,7 @@ public class StringListTest
 	public void testConstructor01()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		String[] source = { "a", "b", "c" };
 
@@ -188,7 +188,7 @@ public class StringListTest
 		Assert.assertEquals(3, target.size());
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -198,7 +198,7 @@ public class StringListTest
 	public void testConstructor02()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList target = new StringList("a", "b", "c");
@@ -206,7 +206,7 @@ public class StringListTest
 		Assert.assertEquals(3, target.size());
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -216,7 +216,7 @@ public class StringListTest
 	public void testIteratorOfChar01()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -242,7 +242,7 @@ public class StringListTest
 		}
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -252,7 +252,7 @@ public class StringListTest
 	public void testShrink01()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -264,7 +264,7 @@ public class StringListTest
 		Assert.assertEquals(0, source.size());
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -274,7 +274,7 @@ public class StringListTest
 	public void testShrink02()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -292,7 +292,7 @@ public class StringListTest
 		Assert.assertEquals("alphabravocharliedelta", source.get(0));
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -302,7 +302,7 @@ public class StringListTest
 	public void testSubstring01()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -313,7 +313,7 @@ public class StringListTest
 		Assert.assertEquals("urge", target.toString());
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -323,7 +323,7 @@ public class StringListTest
 	public void testSubstring02()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -334,7 +334,7 @@ public class StringListTest
 		Assert.assertEquals("urge", target.toString());
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -344,7 +344,7 @@ public class StringListTest
 	public void testSubstring03()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -355,7 +355,7 @@ public class StringListTest
 		Assert.assertEquals("mile", target.toString());
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -365,7 +365,7 @@ public class StringListTest
 	public void testSubstring04()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList source = new StringList();
@@ -376,7 +376,7 @@ public class StringListTest
 		Assert.assertEquals("mile", target.toString());
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -386,7 +386,7 @@ public class StringListTest
 	public void testToString01()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		StringList buffer = new StringList();
@@ -396,7 +396,7 @@ public class StringListTest
 		Assert.assertTrue(target.equals(""));
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -406,7 +406,7 @@ public class StringListTest
 	public void testToString02()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		String source = "abcdefghijklm";
@@ -420,7 +420,7 @@ public class StringListTest
 		Assert.assertTrue(target.equals(source));
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 
 	/**
@@ -430,7 +430,7 @@ public class StringListTest
 	public void testToString03()
 	{
 		//
-		logger.debug("===== test starting...");
+		this.logger.debug("===== test starting...");
 
 		//
 		String source1 = "abcdefghijklm";
@@ -445,6 +445,6 @@ public class StringListTest
 		Assert.assertTrue(target.equals(source1 + source2));
 
 		//
-		logger.debug("===== test done.");
+		this.logger.debug("===== test done.");
 	}
 }
diff --git a/test/fr/devinsy/util/strings/StringsUtilsTest.java b/test/fr/devinsy/util/strings/StringsUtilsTest.java
index 41c0c09..5402f92 100644
--- a/test/fr/devinsy/util/strings/StringsUtilsTest.java
+++ b/test/fr/devinsy/util/strings/StringsUtilsTest.java
@@ -35,8 +35,7 @@ import org.junit.Test;
  */
 public class StringsUtilsTest
 {
-
-	private static org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger(StringsUtilsTest.class);
+	public final org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger(StringsUtilsTest.class);
 
 	/**
 	 * Before.