tvoncommand.java

来自「深入浅出设计模式」· Java 代码 · 共 19 行

package headfirst.command.party;

public class TVOnCommand implements Command {
	TV tv;

	public TVOnCommand(TV tv) {
		this.tv= tv;
	}

	public void execute() {
		tv.on();
		tv.setInputChannel();
	}

	public void undo() {
		tv.off();
	}
}