Eclipse报错
The type Hero is already defined
估计你之前已经存在该类了，将类型改个名就好了
比如将Hero改为Herog

No enclosing instance of type h is accessible. Must qualify the allocation with an enclosing

类的静态方法不能初始化内部类，本来Herog放在h里的，运行时报错

这样就ok了
class Herog {
public String name;

public Herog(String name) {
    // TODO Auto-generated constructor stub
    this.name=name;
}

public void attack(Herog ...heros) {
    for (int i = 0; i < heros.length; i++) {
        System.out.println( "攻击了"+heros[i].name);
    }
}

}

public class h {

public static void main(String[] args) {
    // TODO Auto-generated method stub

    Herog hh=new Herog("盖伦");
    
    Herog h1=new Herog("xiao");

    Herog h2=new Herog("xiao");
    hh.attack(h1,h2);
}

}