4 Java questions please help

[normbrc]

1) Implement (i.e., write the body of) the following method, countLines, that, given a BufferedReader parameter, counts and returns the number of lines of text in the corresponding file/stream.

public static int countLines(BufferedReader in) throws IOException
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2) Implement a new version of the countLines method that catches the possible IOException exception and outputs an error message if such an exception is raised.

public static int countLines(BufferedReader in)
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3) Implement the following method, sumLines, that, given a BufferedReader parameter, reads all the integer values appearing one per line in the corresponding file/stream and returns the sum of the integers. Make sure you catch and handle the possible IOException exceptions.

public static int sumLines(BufferedReader in)

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4) Implement the following void method, copyFile, that, given a BufferedReader parameter and a PrintWriter parameter, copies the file/stream from the given BufferedReader to the file/stream of the given PrintWriter. Make sure you catch and handle the possible IOException exceptions.

public static void copyFile(BufferedReader in, PrintWriter out)

[Laharl]

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