java File IO, std in example

JavaSnippets.java

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class JavaSnippets {

	/**
	 * @param args
	 */
	public static void main(String[] args)throws Exception {
		// string to list
		List<String> list = Arrays.asList("0","2","3");
		list = Arrays.asList("0,1,2".split(","));
		
	}
	
	// read stdIO on java7
	public static List<String> readStdIo() throws IOException {
		List<String> input = new ArrayList<String>();
		try (BufferedReader r = new BufferedReader(new InputStreamReader(System.in))) {
			String line = r.readLine();
			while (line != null) {
				input.add(line);
				line = r.readLine();
			}
		}
		return input;
	}
	
	/** read file on java7 */
	public static List<String> readFile(String name) throws IOException {
		FileSystem fs = FileSystems.getDefault();
		try {
			return Files.readAllLines(fs.getPath(name), Charset.defaultCharset());
		} catch (IOException e) {
			throw e;
		}
	}
	
	/** write file on java7 */
	public static void writeFile(String name, List<String> data) throws IOException{

		FileSystem fs = FileSystems.getDefault();
		Path path = fs.getPath(name);
		
		try (BufferedWriter out = Files.newBufferedWriter(path, Charset.defaultCharset())) {
			for (String line : data) {
				out.write(line);
				out.newLine();
			}
		} catch (IOException e) {
			throw e;
		}
	}
	
	/** read file under java6 */
	public static List<String> readFileOld(String name) throws IOException {
		List<String> list = new ArrayList<>();
		BufferedReader br = null;
		try {
			br = new BufferedReader(new InputStreamReader(new FileInputStream(name), Charset.defaultCharset()));
			String line;
			while ((line = br.readLine()) != null) {
				list.add(line);
			}
		} catch (IOException e) {
			throw e;
		} finally {
			if (br != null) {
				br.close();
			}
		}
		return list;
	}
	
	/** write file under java6 */
	public static void writeFileOld(String name, List<String> data) throws IOException{
		
		BufferedWriter bw = null;

		try  {
			bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(name), Charset.defaultCharset()));
			
			for (String line : data) {
				bw.write(line);
				bw.newLine();
			}
		} catch (IOException e) {
			throw e;
		} finally {
			if (bw != null) {
				bw.close();
			}
		}
	}
}