java - 如何从另一个类访问变量 getter 和 setter

Question

我有3节课

public class GameInfo 
{
  private  int num;
  public void setNum(int num){
         this.num=num;
    }
  public int getNum(){
         return num; 
   }
}

public class NewGame
{ 
  public void foo(){
    GameInfo g = new GameInfo();
    g.setNum(10);
}
}

public class StartGame()
{
   //i want to access the num in GameInfo being set by NewGame class. How to do that? 

}

如果我在 StartGame 类中创建一个 GameInfo 类的新对象，例如

GameInfo g = new GameInfo();
int number = g.getnum(); //it returns 0

我想在数字变量中获取 10。

Answer 1

私有(private)成员(member)num的GameInfo默认情况下初始化为 0。如果您想退回其他东西，您必须调用g.setNum(10)之前g.getNum() .