Dog

public class Dog {
private boolean isMammal;//是否哺乳动物
private boolean isCarnivorous;//是否食肉动物
private int numOfLegs;//有几条腿
private int mood;//情绪；

public void setMammal(boolean isMammal) {
this.isMammal = isMammal;
}
public boolean isMammal() {
return isMammal;
}
public boolean isCarnivorous() {
return isCarnivorous;
}
public void setCarnivorous(boolean isCarnivorous) {
this.isCarnivorous = isCarnivorous;
}
public int getNumOfLegs() {
return numOfLegs;
 }
public void setNumOfLegs(int numOfLegs) {
this.numOfLegs = numOfLegs;
 }
public int getMood() {
return mood;
 }
public void setMood(int mood) {
this.mood = mood;
 }
 //有参数；
public Dog(boolean isMammal, boolean isCarnivorous, int numOfLegs, int mood) {
this.isMammal = isMammal;
this.isCarnivorous = isCarnivorous;
this.numOfLegs = numOfLegs;
this.mood = mood;
}


//情绪；
  public String sayHello(int mood){
 this.setMood(mood);
 switch(this.mood){
      case 1:
return("汪汪汪汪");//开心的时候就汪汪汪汪叫；
 case 2:
return("呜呜呜呜");//不开心的时候就呜呜呜呜叫；
 default:
return("摇摇尾巴");//一般就摇摇尾巴；
}
}
//无参数；
   public void Dog() {
   this.isCarnivorous=true;
   this.isMammal=true;
   this.mood=4;
   this.numOfLegs=1;

}
}