java - 更改属性时需要调用方法

Question

我在 Java 类中有一个属性，当 Java 类中的属性改变它的值时，我需要在同一个类中调用一个方法。我怎样才能做到这一点？

 boolean setInstallMode = false;

 public void callMeWhenChanged() {

    some actions . . . 

 }

Answer 1

设为setInstallMode私有，然后仅通过 setter 方法进行设置。

private boolean installMode = false;

public void setInstallMode(boolean mode)
{
    installMode = mode;
    callMeWhenChanged();
}

public void callMeWhenChanged() {

   some actions . . . 

}

Answer 2

您可以将属性设为私有，然后为该属性设置一个 setAttribute 方法，然后在该 set 属性方法中调用 callMeWhenChanged

private boolean installMode

public void setInstallMode(boolean o){
    this.installMode = o;
    callMeWhenChanged()
    //WhateverElse
}

Answer 3

 private   boolean setInstallMode = false; // Make attribute as private field

 public void setInstallMode(boolean inBooleanValue){ // write public mutator for this attribute 
  this.setInstallMode =inBooleanValue; // update value

   callMeWhenChanged();// Call your logic
  }


 public void callMeWhenChanged() {

    some actions . . . 

 }

Answer 4

您可以像在此示例中那样使用属性更改侦听器：

http://examples.javacodegeeks.com/core-java/beans/bean-property-change-event-listener/