Dictionary 如果在具有用户定义类的树状图中将HashSet设置为值类型,如何覆盖compareTo?
我班上有一个树形图:Dictionary 如果在具有用户定义类的树状图中将HashSet设置为值类型,如何覆盖compareTo?,dictionary,hashset,treemap,comparable,compareto,Dictionary,Hashset,Treemap,Comparable,Compareto,我班上有一个树形图: public Map<Disk, HashSet<Film>> disks=new TreeMap<Disk, HashSet<Film>>(); 如何克服比较法 class Disk{ private int id; public int getId() { return id; } public void setId(int id) { this.id =
public Map<Disk, HashSet<Film>> disks=new TreeMap<Disk, HashSet<Film>>();
如何克服比较法
class Disk{
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}
class Film{
private String title;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}