The read(char, int, int) method of Reader Class in Java is used to read the specified length characters into an array at a specified offset. This method blocks the stream till:
- It has taken some input from the stream.
- Some IOException has occurred
- It has reached the end of the stream while reading.
public int read(char charArray, int offset, int length)
Parameters: This method accepts three mandatory parameters:
- charArray which is the character array to be written in the Stream.
- offset which is the offset index at which the characters are to be written in the array.
- length which is the number of characters to be written in the array.
Return Value: This method returns an integer value which is the number of characters read from the stream. It returns -1 if no character has been read.
Exception: This method throws following exceptions:
- IOException: if some error occurs while input output.
- IndexOutOfBoundsException: if the offset value is not within the range of character array
Below methods illustrates the working of read(char, int, int) method:
[G, e, e, k, s]
[G, e, e, k, s, F, o, r, G, e, e, k, s]
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