Numbers - Java - page 208

public public static void main ( String [] args ) {

TempConverter t = new

static void

new TempConverter ();

t . start ();
t . data ();
t . end ();

}

protected protected void void start () {

}

protected protected void void data () {

for for ( int int i =- 40 ; i <= 120 ; i += 10 ) {

float

float c = ( i - 32 )*( 5 f / 9 );
print ( i , c );

}

}

protected protected void float c ) {

System . out . println ( f + " " + c );

void print ( float float f , float

}

protected protected void void end () {

}

}

This works, but these numbers print with about 15 digits of (useless) decimal fractions! The
second version of this program subclasses the first and uses printf (see Printing with For-
matter and printf ) to control the formatting of the converted temperatures (see
Example 5-10 ) . It will now look right, assuming you're printing in a monospaced font.

Example 5-10. TempConverter2.java
public public class class TempConverter2 TempConverter2 extends extends TempConverter {

public public static void main ( String [] args ) {

TempConverter t = new

static void

new TempConverter2 ();

t . start ();
t . data ();
t . end ();

}

protected protected void float c ) {

System . out . printf ( "%6.2f %6.2f%n" , f , c );

void print ( float float f , float

}

protected protected void void start () {