泛型的使用
package com.ingin.stream.fanxing;
public class People<T> {
private T key;
public T getKey() {
return key;
}
public void setKey(T key) {
this.key = key;
}
public static void main(String[] args) {
// People<java.io.Serializable> people = new People<java.io.Serializable>();
People<Object> people = new People<>();
people.get(10);
people.get("changhao");
people.get(true);
people.getObj("常浩");
people.getObj(true);
System.out.println("-----------------------");
people.getE(true);
people.getE("hello");
System.out.println("-----------------");
people.getNum(10.1);
people.getNum(10);
System.out.println("------------------");
people.setKey(10);
Object num = people.getNum(20);
Integer a = (Integer)num;
System.out.println(a);
}
public void get(T t){
System.out.println(t);
}
public <T> void getObj(T t){
System.out.println(t);
}
public <E> void getE(E e){
System.out.println(e);
}
public <E extends Number> T getNum(E t){
System.out.println(t);
return this.getKey();
}
}