cowoutletmodel1.java

java 教程相应的代码 全是自己写的内附注释 很容易看明白的

package demo.chapter05.inf2;

public class CowOutletModel1 {

	private PowerPlug plug1;
	private PowerPlug plug2;
	private PowerPlug plug3;

	public void setPlug1(ChinaPowerPlug plug1) {
		this.plug1 = plug1;
	}

	public void setPlug2(EuropePowerPlug plug2) {
		this.plug2 = plug2;
	}

	public void setPlug3(PowerPlug plug3) {
		this.plug3 = plug3;
	}

	public boolean trunOnPlug1() {
		return this.plug1.power();
	}
	
	public boolean trunOnPlug2() {
		return this.plug2.power();
	}
	
	public boolean trunOnPlug3() {
		return this.plug3.power();
	}
}