Prior to Java 7, Java did not provide a standard method to copy a file. To implement copying you needed to read all bytes from source file and write to destination. The read() method will return -1 when eof is reached, otherwise it returns the number of bytes read.
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Often you need to read a file line by line. Alternatively sometimes you want to read text word by word (for example to count the occurrence of different words). The Scanner classes next() method can be used for this as shown in the following example. You can find an example of the use of the…
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The readLine() method of java.io.BufferedReader class reads the next line from a text file. When it reaches the end of the file it will return null.
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