一个关于Java泛型的问题，求帮助谢谢

Question

class Demo{
private c a;
public Demo(c a){
this.a=a;
}
public c getA(){
return a;
}
public void setA(c a){
this.a=a;
}
}
public class Generic {
public static void main(String args[]){
Demo b=new Demo(5);
//b.setA();
System.out.print(b.getA());
}
}

Answer 1

尴尬，前面乱了
重写遍
int是基本类型，你换成Integer就好了

Demo b=new Demo<>(5);