Methods 133 { System.out.println( Instantiating (Shared web hosting) first television ); Television t1
Methods 133 { System.out.println( Instantiating first television ); Television t1 = new Television(); System.out.println(t1.volume + + t1.channel); int channel = 206; System.out.println( Instantiating second television ); Television t2 = new Television(channel); System.out.println(t2.volume + + t2.channel); int volume = 7; System.out.println( Instantiating third television ); Television t3 = new Television(channel, volume); System.out.println(t3.volume + + t3.channel); } } The first statement within main() outputs the following: Instantiating first television Then, a Television object is instantiated using no arguments. Flow of control jumps to the no-argument constructor of the Television class. The first statement in the following constructor causes flow of control to jump to the two-argument constructor in the Television class: this(4,10); The two-argument constructor executes, then control jumps back to the one- argument constructor, which executes. Therefore, the output is as follows: Inside two-arg constructor Inside no-arg constructor Notice that the default constructor creates a Television object with an initial volume of 10 and channel 4. The second Television object in ThisDemo uses the one-argument constructor, which uses the this keyword to invoke the two- argument constructor, creating the following output: Inside two-arg constructor Inside one-arg constructor The third Television object invokes the two-argument constructor directly, creating the following output: Inside two-arg constructor The entire output is shown in Figure 5.6.
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