如何改变颜色

Question

我正在尝试打开和关闭灯。 为此，我想将颜色更改为黑色并返回原始颜色。但是if语句没有做任何事情。 我的灯不会改变颜色。

这是代码：

import java.util.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import static java.lang.System.*;

public class Light extends JPanel
{
    //Class variables go here

    private int xLoc= 550, yLoc;
    private int wide = 100, high =100;
    private Color originalC, currentC;


//default constructor
public Light()
{
    xLoc =100;
    yLoc =100;
    wide=50;
    high=50;
    originalC= currentC = Color.red;




}

//Secondary Constructor so you can draw lights of a different color at specified locations
    public Light(Color c,int y)
    {
        yLoc =y;
        originalC = currentC = c;
    }


//mutator or settor methodsh

//If the light is not black (it has a color) then turn it off by setting it to black
public void LightA()
{
if(currentC==originalC)
{
    currentC=Color.black;
}
else
{
    currentC=originalC;
}
}
//If the light is off (current color is black) turn it on by checking it's position and setting the color appropriately


//gettor or accessor methods - think about what information the Light Panel needs to know!


//a helper method called from the LightPanel class that takes the Graphics g argument
//and draws a light at the current class attributes
public void drawLight(Graphics g)
{
    g.setColor(currentC);  //replace Color.red with the class attribute that is the color for a light
    g.fillOval(xLoc,yLoc,wide,high);//replace the numbers with the class attributes so you can draw lights
}
}