Methods 119 The field (Web hosting faq) band is assigned to
Methods 119 The field band is assigned to F, and the setBand() method returns. We are back in the turnOn() method, which sets the field tuning equal to the parameter t. The turnOn() method is now complete, so flow of control jumps back down to main(). The next line of code in main() is a println() statement, but before println() is invoked, the getTuning() method of radio is called. Notice that no arguments are passed in because getTuning() has no parameters. Control jumps to get- Tuning(), which prints out the following: Inside getTuning The getTuning() method declares that it returns a float, so it must do so somewhere in the method. Notice that it returns the tuning field, which is a float containing the current radio station. The value of tuning is returned-byvalue, meaning that a copy of tuning is sent back to main(), similarly to how arguments are copied into parameters. The copy of tuning is sent back as a float and then concatenated to The tuning is , displaying something like the following: The tuning is 100.3 Control is back within main(), and the volume is set to 7. Recall that the setVolume() sets the volume parameter to 5 to demonstrate that the argument has not changed. The output of displaying the contents of x looks like the following: x = 7 The volume is then turned up by invoking turnUp() twice. The band is changed by invoking changeBand(), and the final output looks similar to the following: The volume is now 9, the band is A, and the tuning is 100.3 Figure 5.2 shows a sample output of the ListenToRadio program. Figure 5.2 Sample output of the ListenToRadio program when the command-line argument is 100.3.
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