@Override
public boolean equals(Object obj) {
if(this == obj) {
return true;
}
if(obj == null){
return false;
}
if(!(obj instanceof course)){
return false;
}
course course = (imooc_collection.course) obj;
if(this.name == null) {
if(course.name == null)
return true;
else
return false;
}else {
if(this.name.equals(course.name))
return true;
else
return false;
}
}
右键-->source-->generate hashcode and equals 重写hashcode 和 equals 代码