Implement Try-With-Resources

Pluralsite/src/intermediate/Java Fundamentals - The Core Platform/resources/file1.txt

@@ -0,0 +1 @@
+ABCDEFGHIJKLMNOPQRSTUVWXYZ

Pluralsite/src/intermediate/Java Fundamentals - The Core Platform/resources/file2.txt

@@ -0,0 +1 @@
+ABCDEFGHIJKLMNOPQRSTUVWXYZ

Pluralsite/src/intermediate/Java Fundamentals - The Core Platform/src/trying/with/resources/Helper.java

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+package trying.with.resources;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+/**
+ * Created by Jim on 1/9/2016.
+ */
+public class Helper {
+    static public Reader openReader(String fileName) throws IOException {
+        return Files.newBufferedReader(Paths.get(fileName));
+    }
+
+    static public Writer openWriter(String fileName) throws IOException {
+        return Files.newBufferedWriter(Paths.get(fileName));
+    }
+
+}

Pluralsite/src/intermediate/Java Fundamentals - The Core Platform/src/trying/with/resources/Main.java

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+package trying.with.resources;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+import java.util.Arrays;
+
+public class Main {
+    private static final String filename = "C:\\Users\\sgoud\\JavaProjects\\Learning-Java\\Pluralsite\\src\\intermediate\\Java Fundamentals - The Core Platform\\resources\\";
+
+    public static void main(String[] args) {
+	    // doTryCatchFinally();
+        // doTryWithResources();
+        // doTryWithResourcesMulti();
+        doCloseThing();
+    }
+
+    public static void doTryCatchFinally() {
+        char[] buff = new char[8];
+        int length;
+        Reader reader = null;
+        try  {
+            reader = Helper.openReader("C:\\Users\\sgoud\\JavaProjects\\Learning-Java\\Pluralsite\\src\\intermediate\\Java Fundamentals - The Core Platform\\resources\\file1.txt");
+            while((length = reader.read(buff)) >= 0) {
+                System.out.println("\nlength: " + length);
+                for(int i=0; i < length; i++)
+                    System.out.print(buff[i]);
+            }
+        } catch(IOException e) {
+            System.out.println(e.getClass().getSimpleName() + " - " + e.getMessage());
+        } finally {
+            try {
+                if (reader != null)
+                    reader.close();
+            } catch(IOException e2) {
+                System.out.println(e2.getClass().getSimpleName() + " - " + e2.getMessage());
+            }
+        }
+    }
+
+    public static void doTryWithResources() {
+        char[] buff = new char[8];
+        int length;
+        try (Reader reader = Helper.openReader(filename + "file1.txt")) {
+            while((length = reader.read(buff)) >= 0) {
+                System.out.println("\nlength: " + length);
+                for(int i=0; i < length; i++)
+                    System.out.print(buff[i]);
+            }
+        } catch(IOException e) {
+            System.out.println(e.getClass().getSimpleName() + " - " + e.getMessage());
+        }
+    }
+
+    public static void doTryWithResourcesMulti() {
+        char[] buff = new char[8];
+        int length;
+        try (Reader reader = Helper.openReader(filename + "file1.txt"); Writer writer = Helper.openWriter(filename + "file2.txt")){
+            while((length = reader.read(buff)) >= 0) {
+                System.out.println("\nlength: " + length);
+                writer.write(buff, 0, length);
+            }
+        } catch(IOException e) {
+            System.out.println(e.getClass().getSimpleName() + " - " + e.getMessage());
+        }
+    }
+
+    private static void doCloseThing() {
+        try(MyAutoCloseable ac = new MyAutoCloseable()) {
+            ac.saySomething();
+        } catch (IOException e) {
+            System.out.println(e.getClass().getSimpleName() + " - " + e.getMessage());
+            Arrays.stream(e.getSuppressed()).forEach(System.out::println);
+        }
+    }
+
+}

Pluralsite/src/intermediate/Java Fundamentals - The Core Platform/src/trying/with/resources/MyAutoCloseable.java

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+package trying.with.resources;
+
+import java.io.IOException;
+
+/**
+ * Created by Jim on 1/9/2016.
+ */
+public class MyAutoCloseable implements AutoCloseable {
+    public void saySomething() throws IOException{
+        throw new IOException("Exception Thrown 1");
+//        System.out.println("Something");
+    }
+    @Override
+    public void close() throws IOException {
+        throw new IOException("Exception Thrown 2");
+//        System.out.println("close");
+    }
+}