wip

Author: j5ik2o

src/main/java/j/bridge/delegate/CountDisplay.java

@@ -0,0 +1,21 @@
+package j.bridge.delegate;
+
+public class CountDisplay implements Displaible {
+    private final Display display;
+
+    public CountDisplay(DisplayImpl impl) {
+        this.display = new Display(impl);
+    }
+
+    public void display() {
+        display.display();
+    }
+
+    public void multiDisplay(int times) {
+        display.open();
+        for (int i = 0; i < times; i++) {
+            display.print();
+        }
+        display.close();
+    }
+}

src/main/java/j/bridge/delegate/Displaible.java

@@ -0,0 +1,5 @@
+package j.bridge.delegate;
+
+public interface Displaible {
+    void display();
+}

src/main/java/j/bridge/delegate/Display.java

@@ -0,0 +1,27 @@
+package j.bridge.delegate;
+
+public class Display implements Displaible {
+    private final DisplayImpl impl;
+
+    public Display(DisplayImpl impl) {
+        this.impl = impl;
+    }
+
+    public void open() {
+        impl.rawOpen();
+    }
+
+    public void print() {
+        impl.rawPrint();
+    }
+
+    public void close() {
+        impl.rawClose();
+    }
+
+    public final void display() {
+        open();
+        print();
+        close();
+    }
+}

src/main/java/j/bridge/delegate/DisplayImpl.java

@@ -0,0 +1,9 @@
+package j.bridge.delegate;
+
+public interface DisplayImpl {
+    void rawOpen();
+
+    void rawPrint();
+
+    void rawClose();
+}

src/main/java/j/bridge/delegate/Main.java

@@ -0,0 +1,13 @@
+package j.bridge.delegate;
+
+public class Main {
+    public static void main(String[] args) {
+        Displaible d1 = new Display(new StringDisplayImpl("Hello, Japan."));
+        Displaible d2 = new CountDisplay(new StringDisplayImpl("Hello, World."));
+        CountDisplay d3 = new CountDisplay(new StringDisplayImpl("Hello, Universe."));
+        d1.display();
+        d2.display();
+        d3.display();
+        d3.multiDisplay(5);
+    }
+}

src/main/java/j/bridge/delegate/StringDisplayImpl.java

@@ -0,0 +1,34 @@
+package j.bridge.delegate;
+
+public class StringDisplayImpl implements DisplayImpl {
+    private final String string;
+    private final int width;
+
+    public StringDisplayImpl(String string) {
+        this.string = string;
+        this.width = string.length();
+    }
+
+    @Override
+    public void rawOpen() {
+        printLine();
+    }
+
+    @Override
+    public void rawPrint() {
+        System.out.println("|" + string + "|");
+    }
+
+    @Override
+    public void rawClose() {
+        printLine();
+    }
+
+    private void printLine() {
+        System.out.print("+");
+        for (int i = 0; i < width; i++) {
+            System.out.print("-");
+        }
+        System.out.println("+");
+    }
+}

src/main/java/j/bridge/inheritance/Display.java

@@ -1,7 +1,7 @@
 package j.bridge.inheritance;
 
 public class Display {
-    private DisplayImpl impl;
+    private final DisplayImpl impl;
 
     public Display(DisplayImpl impl) {
         this.impl = impl;

src/main/java/j/bridge/inheritance/StringDisplayImpl.java

@@ -1,8 +1,8 @@
 package j.bridge.inheritance;
 
 public class StringDisplayImpl extends DisplayImpl {
-    private String string;
-    private int width;
+    private final String string;
+    private final int width;
 
     public StringDisplayImpl(String string) {
         this.string = string;