Nio code snippets

Author: sathishmepco

FileIO/src/com/cdac/nio/NioBasicDemo.java

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+package com.cdac.nio;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class NioBasicDemo {
+	
+	public static void main(String[] args) throws IOException {
+		Path path = Paths.get("D:/a.txt");
+		Path path2 = Paths.get("D:\\c.txt");
+
+		//FILE EXISTANCE
+		System.out.println(Files.exists(path));
+		System.out.println(Files.notExists(path));
+		System.out.println("File exist : "+Files.exists(path2));
+		
+		//IS READABLE IS WITABLE
+		System.out.println("Regular file : "+Files.isRegularFile(path));
+		System.out.println("Is Readable : "+Files.isReadable(path));
+		System.out.println("Is Writable : "+Files.isWritable(path));
+		System.out.println("Is executable : "+Files.isExecutable(path2));
+		
+		//IS BOTH FILE SAME OR NOT
+//		System.out.println("Is same file : "+Files.isSameFile(path, path2));
+		
+		//FILE CREATION
+//		System.out.println("Create file : "+Files.createFile(path2)); throws excetpion
+//		Files.createFile(path); // trhows Exceptions
+		/*Files.createDirectories(path);
+		Files.createTempDirectory(path.toString());
+		Files.createFile(path);
+		Files.createTempFile(path,"abc",".txt");*/
+
+//		DELETE
+//		Files.delete(path2);   //throws exception if not exist
+		//System.out.println("Removing a file : "+Files.deleteIfExists(path2));
+		
+		//FILE COPY
+//		Files.copy(path, path2);  //throws exception  file should not be available
+//		Files.copy(path, path2, StandardCopyOption.REPLACE_EXISTING);
+
+		//MOVING FILES
+//		Files.move(path, path2); // throws exception
+//		Files.move(path, path2, StandardCopyOption.REPLACE_EXISTING); file a replace b, file a deleted
+		
+		
+		//READ FILES
+		byte[] buffer = Files.readAllBytes(path);
+		System.out.println("Read by bytes :: "+new String(buffer));
+		List<String> lines = Files.readAllLines(path);
+		System.out.println(lines);
+/*		BufferedReader br = Files.newBufferedReader(path2);
+		br.readLine();
+		br.close();*/
+		
+		//WRITE FILES
+		String content = "Good night";
+		Files.write(path2, content.getBytes());
+		Iterable<String> listLines  = Arrays.asList("Hello","Hi");
+		Files.write(path2, listLines, StandardOpenOption.CREATE);
+		BufferedWriter bw = Files.newBufferedWriter(path2,StandardOpenOption.APPEND);
+		bw.write("Home Work");
+		bw.close();
+	}
+}