Java-为什么受保护的函数不能用于此函数
为什么，如果prova受到保护，我就不能使用super访问它？Java-为什么受保护的函数不能用于此函数,java,Java,为什么，如果prova受到保护，我就不能使用super访问它？ 欢呼声页面中心从FlowPanel扩展，而不是从PageIndex扩展。看起来FlowPanel没有名为prova 如果希望PageCenter使用super关键字从PageIndex访问受保护的属性，则应从PageIndex扩展 package portale.interfaccia; public class PageIndex extends FlowPanel { protected Integer prova;
欢呼声页面中心从FlowPanel扩展，而不是从PageIndex扩展。看起来
FlowPanelprovaPageCentersuperPageIndexPageIndexpackage portale.interfaccia;
public class PageIndex extends FlowPanel {
protected Integer prova;
private PageCenter center;
public PageIndex() {
this.center=new PageCenter();
this.add(center);
}
}
package portale.interfaccia;
public class PageCenter extends FlowPanel {
public PageCenter() {
super.prova=2;
}
}
FlowPanelPageIndexPageCenterpublic class PageCenter extends PageIndex{
public PageCenter(){
prova = 2;
}
}
public class ProvaUtility{
private Integer prova;
public Integer getProva(){}
public void setProva(Integer p){}
}
ProvaInstance.getInstance（）.getProva（）FlowPanelprovaPageCentersuperPageIndexPageIndexpackage portale.interfaccia;
public class PageIndex extends FlowPanel {
protected Integer prova;
private PageCenter center;
public PageIndex() {
this.center=new PageCenter();
this.add(center);
}
}
package portale.interfaccia;
public class PageCenter extends FlowPanel {
public PageCenter() {
super.prova=2;
}
}
FlowPanelPageIndexPageCenterpublic class PageCenter extends PageIndex{
public PageCenter(){
prova = 2;
}
}
public class ProvaUtility{
private Integer prova;
public Integer getProva(){}
public void setProva(Integer p){}
}
PageCenterProvaInstance.getInstance（）.getProva（）superFlowPanelPageCenterPageIndexprotectedsuperPageCenterFlowPanelPageCenterPageIndexprotected