计算平均值时意外的 return 值？

Question

我无法在 getter 方法中 return "average" 变量的值。我一直收到错误 "incompatible types: unexpected return value" 但该值是在上面的 setter 方法中定义的？

我寻找了类似的问题，但找不到与此相近的问题

public class Student {

    private String firstName;
    private String lastName;
    private int score1, score2, score3;
    private int average;



      public void setFirstName(String name){
      firstName = name;
    }
      public String getFirstName(){
      return firstName;
    }
      public void setLastName(String name){
      lastName = name;
    }
      public String getLastName(){
      return lastName;
    }
      public void setScore1(String newvalue){
      score1 = Integer.parseInt(newvalue);
    }
      public int getScore1(int newvalue){
      return score1;
    }
      public void setScore2(String newvalue){
      score2 = Integer.parseInt(newvalue);
    }
      public int getScore2(int newvalue){
      return score2;
    }
      public void setScore3(String newvalue){
      score3 = Integer.parseInt(newvalue);
    }
      public int getScore3(int newvalue){
      return score3;
    }
      public int setAverage(int newvalue){
      average = (score1 + score2 + score3)/3;
    }
      public void getAverage(String newvalue){
      return average;
    } 
}

Answer 1

因为您的 getAverage(String newvalue) 方法有一个由 return 类型组成的函数定义 void 并且您正在 return 从该方法中获取值。

Any method having return type set as void in the function definition/declaration isn't supposed to return any value.

请更正为：-

public int getAverage(String newvalue){
  return average;

计算平均值时意外的 return 值？

unexpected return value when computing average?

java

getter

getter-setter

bluej