FileLine.java

package pl.shockah;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.ArrayList;

public class FileLine {
	public static ArrayList<String> read(File file) {
		ArrayList<String> ret = new ArrayList<String>();
		if (!file.exists()) return ret;
		
		try {
			BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file),Helper.utf8));
			String line; while ((line = br.readLine()) != null) ret.add(line);
			br.close();
		} catch (Exception e) {e.printStackTrace();}
		return ret;
	}
	public static String readString(File file) {
		String ret = "";
		if (!file.exists()) return ret;
		
		try {
			BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file),Helper.utf8));
			String line; boolean first = true; while ((line = br.readLine()) != null) {
				if (first) first = false; else ret += "\n";
				ret += line;
			}
			br.close();
		} catch (Exception e) {e.printStackTrace();}
		return ret;
	}
	
	public static void write(File file, ArrayList<String> lines) {
		File temp = null;
		try {
			try {
				temp = File.createTempFile("shocky", ".tmp");
			} catch (IOException e1) {
				throw new RuntimeException(e1);
			}
			//file.createNewFile();
			
			System.out.printf("File: %s Temp: %s", file.getAbsolutePath(), temp.getAbsolutePath()).println();
			
			BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(temp),Helper.utf8));
			for (int i = 0; i < lines.size(); i++) {
				if (i != 0) bw.write('\n');
				bw.write(lines.get(i));
			}
			bw.close();
			
			if (file.exists())
				file.delete();
			temp.renameTo(file);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (temp != null && temp.exists())
				temp.delete();
		}
	}
}