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71 lines (54 loc) · 1.14 KB
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package chapter02;
public class TV {
private boolean power;
private int channel; // 0~50
private int volume; // 0~50
public TV(int channel, int volume, boolean power) {
this.power = power;
this.channel = channel;
this.volume = volume;
}
public void power(boolean on) {
this.power = on;
}
public void channel(int channel) {
if (power) {
if(channel > 50) {
this.channel = 0;
}else if(channel < 0 ) {
this.channel = 50;
}else {
this.channel = channel;
}
}
}
public void channel(boolean up) {
if(up) {
channel(this.channel+1);
}else {
channel(this.channel-1);
}
}
////////////////////////
public void volume(int volume) {
if (power) {
if(volume > 50) {
this.volume = 0;
}else if(volume < 0 ) {
this.volume = 50;
}else {
this.volume = volume;
}
}
}
public void volume(boolean up) {
if(up) {
volume(this.volume+1);
}else {
volume(this.volume-1);
}
}
public void status() {
System.out.println("TV[power=" + power + ", channel=" + channel + ", volume=" + volume + "]");
}
}