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FileUtil.java
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67 lines (60 loc) · 1.86 KB
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package array;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
/**
* Single class to be used for any interactions with Files.
*
* @author shivam.maharshi
*/
public class FileUtil {
public static List<String> read(String filepath, long startOffset, long readLimit) {
System.out.println("Reading file : "+filepath);
List<String> list = new ArrayList<String>();
try {
BufferedReader file = new BufferedReader(new FileReader(filepath));
String line = null;
while ((line = file.readLine()) != null && startOffset > 0) {
startOffset--;
}
long count = 0;
while ((line = file.readLine()) != null) {
list.add(line.trim());
count++;
if (count >= readLimit)
break;
}
file.close();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("Data read from : "+filepath);
return list;
}
public static List<String> read(String filepath) {
return read(filepath, 0, Long.MAX_VALUE);
}
public static List<String> read(String filepath, long readLimit) {
return read(filepath, 0, readLimit);
}
public static void write(List<String> list, String filepath) {
System.out.println("Writing data to : "+filepath);
try {
Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filepath), "utf-8"));
for (String line : list) {
writer.write(line + "\n");
}
writer.flush();
writer.close();
System.out.println("Data written to : " + filepath);
} catch (IOException e) {
e.printStackTrace();
}
}
}