design patterns : flyweight

design-pattern/gof/src/flyweight/after/Character.java

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+package flyweight.after;
+
+public class Character {
+
+    private char value;
+
+    private String color;
+
+    private Font font;
+
+    public Character(char value, String color, Font font) {
+        this.value = value;
+        this.color = color;
+        this.font = font;
+    }
+}

design-pattern/gof/src/flyweight/after/Client.java

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+package flyweight.after;
+
+public class Client {
+
+    public static void main(String[] args) {
+        FontFactory fontFactory = new FontFactory();
+        Character c1 = new Character('h', "white", fontFactory.getFont("nanum:12"));
+        Character c2 = new Character('e', "white", fontFactory.getFont("nanum:12"));
+        Character c3 = new Character('l', "white", fontFactory.getFont("nanum:12"));
+        Character c4 = new Character('l', "white", fontFactory.getFont("nanum:12"));
+        Character c5 = new Character('o', "white", fontFactory.getFont("nanum:12"));
+    }
+}

design-pattern/gof/src/flyweight/after/Font.java

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+package flyweight.after;
+
+public final class Font {
+
+    final String family;
+
+    final int size;
+
+    public Font(String family, int size) {
+        this.family = family;
+        this.size = size;
+    }
+
+    public String getFamily() {
+        return family;
+    }
+
+    public int getSize() {
+        return size;
+    }
+}

design-pattern/gof/src/flyweight/after/FontFactory.java

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+package flyweight.after;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class FontFactory {
+
+    private final Map<String, Font> cache = new HashMap<>();
+
+    public Font getFont(String font) {
+        if (cache.containsKey(font)) {
+            return cache.get(font);
+        } else {
+            String[] split = font.split(":");
+            Font newFont = new Font(split[0], Integer.parseInt(split[1]));
+            cache.put(font, newFont);
+            return newFont;
+        }
+    }
+}

design-pattern/gof/src/flyweight/before/Character.java

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+package flyweight.before;
+
+public class Character {
+
+    private char value;
+
+    private String color;
+
+    private String fontFamily;
+
+    private int fontSize;
+
+    public Character(char value, String color, String fontFamily, int fontSize) {
+        this.value = value;
+        this.color = color;
+        this.fontFamily = fontFamily;
+        this.fontSize = fontSize;
+    }
+}

design-pattern/gof/src/flyweight/before/Client.java

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+package flyweight.before;
+
+public class Client {
+
+    public static void main(String[] args) {
+        Character c1 = new Character('h', "white", "Nanum", 12);
+        Character c2 = new Character('e', "white", "Nanum", 12);
+        Character c3 = new Character('l', "white", "Nanum", 12);
+        Character c4 = new Character('l', "white", "Nanum", 12);
+        Character c5 = new Character('o', "white", "Nanum", 12);
+    }
+}