Please help me with the "TODO", thank you.

import java.util.ArrayList;

/**

* Class to read lines from a file.

*/

public class MyFileReader {

/**

* Name of file being read.

*/

private String filename;

/**

* Creates MyFileReader with given filename to read.

* @param filename to read

*/

public MyFileReader(String filename) {

this.filename = filename;

}

/**

* Opens the file specified by filename and reads the text line by line.

* Cleans up each line by trimming whitespace from the beginning and end of each line.

* Adds each line to an ArrayList which is returned from the method.

* If a line is empty (does not contain any text), it's skipped and is not added to the ArrayList.

*

* Example:

* - Calling getCleanContent() will open and read the file, clean up the text line by line,

* add each line containing text to an ArrayList, and return the ArrayList from the method.

* If there is a line "nice to meet you ", it will become "nice to meet you"

* If there is a line " hello world ", it will become "hello world"

* If there is a line "today is a nice day", it will remain "today is a nice day"

* If there is a line " ", it will be skipped and not added to the ArrayList

*

* @return list of lines with no empty spaces at the beginning or end of each line

*/

public ArrayList getCleanContent() {

ArrayList lines = new ArrayList();

//TODO Implement method

return lines;

}

}