覆盖compareTo(T t)

Question

我做了一个名为"People"的类,它有一个String名称.现在我想使用TreeSet比较两个对象.

public class People<T> implements Comparable<T> {

    public TreeSet<People> treeSet;
    public String name;

    public People(String name)
    {
        treeSet =  new TreeSet();
this.name = name;
    }

.....

@Override
    public int compareTo(T y) {

        if(this.name.equals(y.name)) blablabla; //Here I get error 
    }

错误:

Cannot find symbol
symbol: variable name;
location: variable y of type T
where T is a type variable 
T extends Object declared in class OsobaSet

有谁知道如何解决这个问题？

Answer 1

Comparable接口中的泛型类型代表将要比较的对象类型.

这是您的示例的正确用法:

public class People implements Comparable<People>

在这种情况下,方法签名将是

@Override
public int compareTo(People y) {
    if (this.name.equals(y.name))  { ...
}