Question

Could anubody explain how to use set methods? Problem:

class Sonum {
   private int prior;
   public Sonum(int prior) {
      this.prior = prior;
   }
   public int getPrior() {
      return prior;
   }
   public void setPrior(int prior) {
      this.prior = prior;
   }

class Tel {
   // Please explain how can I set the value for prior? (for example 2)
}

Answer 1

Well, first you need an instance of Sonum on which you want to set the prior value. For example:

class Test {
  public void foo() {
    Sonum sonum = new Sonum(5);
    // Use it with a prior of 5
    // ...
    sonum.setPrior(10);
    // Now use it with a prior of 10
  }
}

Answer 2

Sonum mySonum = new Sonum(1); //prior is currently 1
mySonum.setPrior(2); //now prior is 2

Answer 3

呼吸深厚。 The Java Tutorial 。阅读。你们会理解。

Answer 4

参考

Objects Creat

rel=“nofollow” http://download.oracle.com/javase/tutorial/java/javaOO/objectproduction.html

Answer 5

“更好的方法”是mag。它们只是常规方法。你们需要这个类别,然后,你可以把方法称作这一类。同任何其他 Java物体一样。

Answer 6

既定方法涉及私人价值,我们要防止他直接使用客户,因为有办法。

The biggest advantage of get set methods is the control ability ! We can for example control a minimum age when we want to set an age, and many other simple examples.

例:

setAge (int age)
{
    if ( age < 0 )
    {
        System.out.println ( "Wrong age !!" );
    }
}

现在我认为你很容易理解这一HW:

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