Added more examples

Author: tdebatty

src/main/java/info/debatty/java/stringsimilarity/Main.java

@@ -0,0 +1,97 @@
+/*
+ * The MIT License
+ *
+ * Copyright 2015 Thibault Debatty.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package info.debatty.java.stringsimilarity;
+
+import java.util.ArrayList;
+
+/**
+ *
+ * @author tibo
+ */
+public class Main {
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args) {
+        ArrayList<StringSimilarityInterface> similarities = new ArrayList<StringSimilarityInterface>();
+        similarities.add(new JaroWinkler());
+        similarities.add(new Levenshtein());
+        similarities.add(new LongestCommonSubsequence());
+        similarities.add(new NGram(4));
+        similarities.add(new QGram(4));
+        
+        ArrayList<Pair> pairs = new ArrayList<Pair>();
+        // adjacent letters switch
+        pairs.add(new Pair("ABCDEFGHIJ", "ABDCEFGHIJ"));
+        
+        // adjacent letters switch, with mixed cases
+        pairs.add(new Pair("abcdefghij", "ABDCEFGHIJ"));
+        
+        // close letters switch
+        pairs.add(new Pair("ABCDEFGHIJ", "ABFDECGHIJ"));
+        
+        // 2 blocks switch
+        pairs.add(new Pair("ABCDEFVWXYZ", "VWXYZABCDEF"));
+        
+        // block switch in a long sequence
+        pairs.add(new Pair(
+                "Lorem ipsum dolor sit amet, MY BLOCK IS HERE consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.",
+                "Lorem ipsum dolor sit amet, consectetur adipiscing elit, MY BLOCK IS HERE sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."));
+        
+        // Semanticly similar
+        pairs.add(new Pair(
+                "Mon automobile est en panne",
+                "Ma voiture est cassée"
+        ));
+        
+        // multiple blocks switch
+        pairs.add(new Pair("AZERPOIUQSDFMLKJ", "QSDFMLKJAZERPOIU"));
+        
+        // completely different...
+        pairs.add(new Pair("AZERTYUIOP", "QSDFGHJKLM"));
+        
+        
+        for(Pair pair: pairs) {
+            System.out.println("\n" + pair._1 + " <> " + pair._2);
+            for (StringSimilarityInterface similarity: similarities) {
+                System.out.printf("%-25s : %f\n",
+                        similarity.getClass().getSimpleName(),
+                        similarity.similarity(pair._1, pair._2));
+            }
+        }
+    }
+    
+}
+
+class Pair {
+    public String _1 = "";
+    public String _2 = "";
+    
+    public Pair(String s1, String s2) {
+        _1 = s1;
+        _2 = s2;
+    }
+}

src/main/java/info/debatty/java/stringsimilarity/QGram.java

@@ -18,6 +18,14 @@ public static void main(String[] args) {
 
         // Should be 0.5 (2 / 4)
         System.out.println(dig.distance("ABCD", "ABCE"));
+        
+        // AB BC CD DE BX XB CE
+        // 2 / 7
+        System.out.println(dig.similarity("ABCDE", "ABXBCE"));
+        
+        System.out.println(dig.similarity(
+                "High Qua1ityMedications   Discount On All Reorders = Best Deal Ever! Viagra50/100mg - $1.85 071",
+                "High Qua1ityMedications   Discount On All Reorders = Best Deal Ever! Viagra50/100mg - $1.85 7z3"));
     }
 
     private int n;