add Rule5&6

yi-yun · yi-yun · commit 7299c5daaa0f · 2019-01-31T21:36:12.000+08:00
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
diff --git a/effective_java/src/main/java/com/yiyun/AllTest.java b/effective_java/src/main/java/com/yiyun/AllTest.java
@@ -2,13 +2,24 @@
 
 import com.yiyun.Rule03.Elvis;
 import com.yiyun.Rule04.UtilityClass;
+import com.yiyun.Rule05.Lexicon;
+import com.yiyun.Rule05.SpellChecker;
+import com.yiyun.Rule06.RomanNumerals;
 import org.junit.Test;
 
 public class AllTest {
 
     @Test
     public void Test0x(){
-        
+    }
+    @Test
+    public void Test06(){
+        System.out.println(RomanNumerals.isRomanNumeral("IV"));
+    }
+    @Test
+    public void Test05(){
+        SpellChecker spellChecker = new SpellChecker(new Lexicon());
+        System.out.println(spellChecker.isValid("test"));
     }
     @Test
     public void Test03(){
diff --git a/effective_java/src/main/java/com/yiyun/Rule05/Lexicon.java b/effective_java/src/main/java/com/yiyun/Rule05/Lexicon.java
@@ -0,0 +1,4 @@
+package com.yiyun.Rule05;
+
+public class Lexicon {
+}
diff --git a/effective_java/src/main/java/com/yiyun/Rule05/SpellChecker.java b/effective_java/src/main/java/com/yiyun/Rule05/SpellChecker.java
@@ -0,0 +1,13 @@
+package com.yiyun.Rule05;
+
+import java.util.List;
+import java.util.Objects;
+
+public class SpellChecker {
+    private final Lexicon dictionary;
+    public SpellChecker(Lexicon dictionary) {
+        this.dictionary = Objects.requireNonNull(dictionary);
+    }
+    public boolean isValid(String word) {return true;}
+    public List<String> suggestions(String typo) {return null;}
+}
diff --git a/effective_java/src/main/java/com/yiyun/Rule06/RomanNumerals.java b/effective_java/src/main/java/com/yiyun/Rule06/RomanNumerals.java
@@ -0,0 +1,10 @@
+package com.yiyun.Rule06;
+
+import java.util.regex.Pattern;
+
+public class RomanNumerals {
+    private static final Pattern ROMAN = Pattern.compile("^(?=.)M*(C[MD]|D?C{0,3})" + "(X[CL]|L?X{0,3})(I[XV]|V?I{0,3})$");
+    public static boolean isRomanNumeral(String s) {
+        return ROMAN.matcher(s).matches();
+    }
+}

-Original file line number
+Diff line change
@@ @@ -0,0 +1,4 @@ @@
 +package com.yiyun.Rule05;
++
 +public class Lexicon {
 +}