Question

我有一个遥控器，我想附加到另一个班级的开关，但我不知道该怎么做。

public class Remote {
boolean stateRemote;

public Remote()
{
    stateRemote = false;
}
public void attach(Switch aSwitch)
{

}
public void pressButton()
{
    if (stateRemote == false)
    {
    stateRemote = true; 
    }
    else if (stateRemote == true)
    {
        stateRemote = false;
    }
}

}

在“公共无效附加”中，我不知道该放什么。

这是我之前提到的另一个课程。

System.out.println("Testing Switch Methods\n_________________________________");
    System.out.println("Making a new Switch with the no constructor having no parameters");
    Switch aSwitch= new Switch();
    System.out.println("After construction, Switch is on?: " + aSwitch.state());
    aSwitch.flip();
    System.out.println("After flipping, Switch is on?: " + aSwitch.state());
    System.out.println("Making a new Switch with constructor having its parameter set to true");
    aSwitch= new Switch(true);
    System.out.println("After construction, Switch is on?: " + aSwitch.state());
    aSwitch.flip();
    System.out.println("After flipping, Switch is on?: " + aSwitch.state());

    System.out.println("\nTesting Plug Methods\n_________________________________");
    Plug aPlug = aSwitch.wherePlug();
    System.out.println("Switch is on? " + aSwitch.state() +
        " Plug is on? " + aPlug.state());
    aSwitch.flip();
    System.out.println("Switch is on? " + aSwitch.state() +
        " Plug is on? " + aPlug.state());

    System.out.println("\nTesting Lamp Methods\n_________________________________");
    Lamp aLamp = new Lamp();
    System.out.println("After construction, Lamp is on?: " + aLamp.state());
    aLamp.attach(aSwitch.wherePlug());
    System.out.println("After plugging, Lamp is on?: " + aLamp.state());

    System.out.println("\nTesting Remote Methods\n_________________________________");
    Remote aRemote = new Remote();
    aRemote.attach(aSwitch);
    System.out.println("Before pressing remote button");
    System.out.println("Switch on? " + aSwitch.state() + 
        " Plug on? " + aPlug.state());
    System.out.println("After pressing remote button");
    aRemote.pressButton();
    System.out.println("Switch on? " + aSwitch.state() + 
        " Plug on? " + aPlug.state());

切换班级

public class Switch {
boolean stateSwitch;
Plug plug;
public Switch()
{
    stateSwitch = false;
    plug = new Plug(stateSwitch);
}
public Switch(boolean initialState)
{
    stateSwitch = initialState;
    plug = new Plug(stateSwitch);
}
public boolean state()
{
    return stateSwitch;
}

public void flip()
{
    stateSwitch = !stateSwitch;
    plug.flip();
}
public Plug wherePlug()
{
    return plug;
}


}

插件类

public class Plug {
boolean statePlug;
public Plug() 
{
    statePlug = false;
}

public boolean state() {
        return statePlug;
}
public Plug(boolean state)
{
    statePlug = state();
}
public void flip()
{
    statePlug = !statePlug;
}
}

Answer 1

我想你想要这样的东西：

将其添加到班级的顶部：

//Add a field in your Remote class representing a Switch that your Remote can attach to  
Switch s;

然后在attach（）中添加行

//Give our Remote a reference to the Switch provided as the argument when you call attach()
s=aSwitch; 
//Make the state of the Remote equal to the current state of the Switch
stateRemote = s.state();

然后在pressButton（）中添加：

if(s != null) {
    // When we click the button we want the Switch to be flipped. However first we have to check that s != null to make sure that we are attached to a Switch.
    s.flip(); 
}

当我们在Remote上调用pressButton（）时，它会在连接的Switch上调用flip（）。因此，下次我们检查s.state（）时，它将返回与我们按下按钮之前相反的情况。

添加插件：

在Plug类

中

为插件添加新的构造函数

public Plug(boolean state) {
    statePlug = state;
}

添加flip（）方法

 public void flip() {
    statePlug = !statePlug;
}

在Switch类

中

在Switch类的顶部添加

//declare a field in Switch for the Plug
Plug p;

在公共Switch（）和公共Switch（布尔值）中，将此行添加到底部：

//create a new instance of Plug that we will use with this Switch.
//make the initial state of the plug equal to the state of the Switch. 
p = new Plug(stateSwitch);

在wherePlug（）中放置

//return the Plug we created
return p;

在Switch类的flip（）中添加

//flip the value of our Plug so that it equals the value of the Switch
p.flip();

我不知道您是否应该如何为您的作业找到插件，但它将与您提供的测试代码一起使用。

从另一个类附加到一个对象？

1 个答案: