BINARY I/O - Introduction to Java Programming: Comprehensive Version - page 690

public static void main(String[] args) {
try (
FileInputStream fis = new FileInputStream( "test.dat" ); ) {
}
catch (IOException ex) {
ex.printStackTrace();
}
catch (FileNotFoundException ex) {
ex.printStackTrace();
}
}
}

17.18

Suppose you run the following program on Windows using the default ASCII encod-
ing after the program is finished, how many bytes are there in the file t.txt ? Show the
contents of each byte.

public class Test {
public static void main(String[] args)
throws java.io.IOException {
try (java.io.PrintWriter output =
new java.io.PrintWriter( "t.txt" ); ) {
output.printf( "%s" , "1234" );
output.printf( "%s" , "5678" );
output.close();
}
}
}
17.19 After the following program is finished, how many bytes are there in the file t.dat ?
Show the contents of each byte.

import java.io.*;

public class Test {
public static void main(String[] args) throws IOException {
try (DataOutputStream output = new DataOutputStream(
new FileOutputStream( "t.dat" )); ) {
output.writeInt( 1234 );
output.writeInt( 5678 );
output.close();
}
}
}

17.20

For each of the following statements on a DataOutputStream output , how many
bytes are sent to the output?

output.writeChar( 'A' );
output.writeChars( "BC" );
output.writeUTF( "DEF" );

17.21

What are the advantages of using buffered streams? Are the following statements correct?

BufferedInputStream input1 =
new BufferedInputStream( new FileInputStream( "t.dat" ));
DataInputStream input2 = new DataInputStream(
new BufferedInputStream( new FileInputStream( "t.dat" )));
DataOutputStream output = new DataOutputStream(
new BufferedOutputStream( new FileOutputStream( "t.dat" )));