Collections.Sort错误（绑定不匹配）

Question

public class PaAcao implements Serializable, IAcao, Comparable<PaAcao> /* Ordenar */  {

@Override
public int compareTo(PaAcao acaoCompara) {
    //return this.aresta - outro.aresta;
    int i = 0;
    String[] array1 = this.cnrAcao.split(".");
    String[] array2 = acaoCompara.cnrAcao.split(".");
    
    for(String c : array1){
        if (array2.length > i){             
            if (Integer.parseInt(c) > Integer.parseInt(array2[i])) 
            {
                return 1;
            }
            if (Integer.parseInt(c) < Integer.parseInt(array2[i])) 
            {
                return -1;
            }               
        }
        i++;
    }               
    return -1;
}  

package br.com.agraria.qualidade.model.entity;

public interface IAcao{

    public abstract String getCnmUsuarResp();   
    public abstract Usuario getusuarResp();
    public abstract void setusuarResp(Usuario usuarResp);
    public abstract PaStatusAcao getIcdStatus();
    public abstract String getCnrAcao();
    public abstract Boolean getLpublico();

}

public class PaAcaoServiceImpl extends HibernateGenericServiceImpl<PaAcao> implements PaAcaoService {
    @Override
    public List<? extends IAcao> processarAcoes(List<? extends IAcao> acoesProcessar) {
        SessaoPrivilegiosGerente sessaoPrivilegiosGerente = sessaoService.getSessaoPrivilegiosGerente();
        List<IAcao> macroRemover = new ArrayList<IAcao>();
    
        Collections.sort(acoesProcessar);
        
        ...

    }
}

问题出在行collections.sort（acoesProcessar）；我得到的信息是：

绑定不匹配：类型集合的泛型方法sort(list ) 不适用于参数(list )。推断的类型捕获#14-of？extends Iacao不是有界参数 >

Answer 1

解决方案是（感谢Deactivator2对我的帮助）：

在接口IACAO上扩展可比：

package br.com.agraria.qualidade.model.entity;

public interface IAcao extends Comparable<IAcao>{

    public abstract String getCnmUsuarResp();   
    public abstract Usuario getusuarResp();
    public abstract void setusuarResp(Usuario usuarResp);
    public abstract PaStatusAcao getIcdStatus();
    public abstract String getCnrAcao();
    public abstract Boolean getLpublico();

}

在我的类PaAcao中，我删除了carparable的实现，因为它会被复制，并将类型os compareTo更改为IAcao而不是PaAcao：

public class PaAcao implements Serializable, IAcao /* Ordenar */  {

@Override
public int compareTo(IAcao acaoCompara) {
    //return this.aresta - outro.aresta;
    int i = 0;
    String[] array1 = this.cnrAcao.split(".");
    String[] array2 = acaoCompara.cnrAcao.split(".");

    for(String c : array1){
        if (array2.length > i){             
            if (Integer.parseInt(c) > Integer.parseInt(array2[i])) 
            {
                return 1;
            }
            if (Integer.parseInt(c) < Integer.parseInt(array2[i])) 
            {
                return -1;
            }               
        }
        i++;
    }               
    return -1;
}