Java类和访问器方法 [英] Class and accessor methods Java

问题描述

我不理解访问器方法，并且无法创建setAge，getAge和getName.

I don't understand accessor methods and I'm stuck with creating setAge, getAge and getName.

这是问题:

添加三个访问器方法setAge，getAge和getName.这些方法应设置并获取相应实例变量的值.

Add three accessor methods, setAge, getAge and getName. These methods should set and get the values of the corresponding instance variables.

public class Player {

    protected int age;
    protected String name;

    public Player(String namArg) {
        namArg = name;
        age = 15;
    }
}

推荐答案

访问器方法用于返回私有或受保护字段的值.它遵循一种命名方案，在方法名称的开头加上单词"get".例如，让我们为名称添加访问器方法:

An accessor method is used to return the value of a private or protected field. It follows a naming scheme prefixing the word "get" to the start of the method name. For example let's add accessor methods for name:

class Player{
   protected name

//Accessor for name
   public String getName()
   {
     return this.name;
   }
}

您可以通过以下对象访问受保护名称的值:

you can access the value of protected name through the object such as:

Player ball = new Player()
System.out.println(ball.getName())

mutator方法用于设置私有字段的值.它遵循一种命名方案，在方法名称的开头加上单词"set".例如，让我们为名称添加mutator字段:

A mutator method is used to set a value of a private field. It follows a naming scheme prefixing the word "set" to the start of the method name. For example, let's add mutator fields for name:

//Mutator for name
   public void setName(String name)
   {
     this.name= name;
   }

现在我们可以使用以下方法设置玩家名称: ball.setName('David');

now we can set the players name using: ball.setName('David');

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