Java IO Tutorial - Java FilterReader.read(char[] cbuf, int off, int len)

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Syntax

FilterReader.read(char[] cbuf, int off, int len) has the following syntax.

public int read(char[] cbuf, int off, int len)  throws IOException

Example

In the following code shows how to use FilterReader.read(char[] cbuf, int off, int len) method.

//w  w w. ja v a  2s .c om
import java.io.FilterReader;
import java.io.Reader;
import java.io.StringReader;

public class Main {
  public static void main(String[] args) throws Exception {

    char[] cbuf = new char[6];
    int i = 0;

    Reader r = new StringReader("ABCDEF");

    FilterReader fr = new FilterReader(r) {
    };

    // read data of len 4, to the buffer
    i = fr.read(cbuf, 2, 4);
    System.out.println("No. of characters read: " + i);

    // read till the end of the char buffer
    for (char c : cbuf) {
      // checks for the empty character in buffer
      if ((byte) c == 0)
        c = '-';

      System.out.print(c);
    }

  }
}

The code above generates the following result.

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