Add 'AdapterExamples' to 'adapter.example'

Author: radmitr

m17-bonus-module-design-patterns/DesignPatterns/src/main/java/adapter/example/AdapterExamples.java

@@ -0,0 +1,53 @@
+package adapter.example;
+
+import java.io.*;
+import java.util.Arrays;
+import java.util.List;
+
+public class AdapterExamples {
+
+    public static void main(String[] args) throws IOException {
+        // 1 - Arrays -> List
+        List<Integer> list = Arrays.asList(1, 2, 3);
+
+        // 2 - InputStreamReader
+        FileInputStream fis = new FileInputStream("somefile.txt");
+        InputStreamReader isr = new InputStreamReader(fis);
+
+        int t;
+        while((t = isr.read())!= -1) {
+            // convert the integer true to character
+            char r = (char)t;
+            System.out.println("Character : " + r);
+
+            // check if the stream ready
+            boolean b = isr.ready();
+            System.out.println("Ready? : " + b);
+        }
+
+        isr.close();
+        fis.close();
+
+        // 3 - OutputStreamWriter
+        OutputStream os = new FileOutputStream("test.txt");
+        OutputStreamWriter osw = new OutputStreamWriter(os);
+        FileInputStream fis2 = new FileInputStream("test.txt");
+
+        // use of write(int char):
+        // writing character values to the "test.txt"
+        osw.write(71);
+        osw.write(69);
+        osw.write(69);
+        osw.write(75);
+        osw.write(83);
+
+        osw.flush();
+
+        // read what we write
+        for (int i = 0; i < 5; i++) {
+            // reading the content of "test.txt" file
+            System.out.println("write(int char): " + (char) fis2.read());
+        }
+        osw.close();
+    }
+}