Thread: Abstract Method

I would like to create a class file in which I can change how a method in it works by writing it in another class file. For example,

 button.addActionListener(new ActionListener() {
 
            public void actionPerformed(ActionEvent e)
            {
                //Execute when button is pressed
                System.out.println("You clicked the button");
            }
        });

So I want to be able to create several of the same objects like you can in JButton, but then I want to be able to write a method type such as actionPerformed, so that each object has the same method name, but they do not do the same actions as for the other objects. Anybody know how I can do this?

Well, I'm not sure, I don't think so. This is my code, I'm programming with LWJGL.

My Button Class. Where it says System.out.println("Action Button"); under the input method. I want to change that to a method called actionEvent(). But I don't want to write out the method in the Button Class. I want to be able to write it in another class file I call Main Menu, where I have several Button Objects. So each Button object must have a different actionEvent().

Example in Main Menu Class:

Button singlePlayer = new Button(10, 10, 100, 100, "texture.png"){
public void actionEvent(){
//load singlePlayer Menu
};
Button mutliPlayer = new Button(10, 150, 100, 100, "texture.png"){
public void actionEvent(){
//load multiPlayer Menu
}
};

Now the problem is that both buttons will only load the mutliplay Menu.

package gui;
 
import java.awt.Rectangle;
 
import org.lwjgl.input.Mouse;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.GL11;
import org.newdawn.slick.Color;
import org.newdawn.slick.opengl.Texture;
import org.newdawn.slick.opengl.TextureLoader;
import org.newdawn.slick.util.ResourceLoader;
 
public class Button {
	private int width;
	private int height;
	private int x;
	private int y;
	private Rectangle bounds;
	private float widthRatio;
	private float heightRatio;
	private Texture texture;
 
	public Button(int x, int y, int width, int height, String res){
		widthRatio = (float)((float)Display.getWidth())/1920.0f;
		heightRatio = (float)((float)Display.getHeight())/1080.0f;
		this.x = (int) (x * widthRatio);
		this.y = (int) (y * heightRatio);
		this.width = (int)((int)(width * widthRatio));
		this.height = (int)((int)(height * heightRatio));
		bounds = new Rectangle();
		bounds.x = this.x;
		bounds.width = this.x + this.width;
		bounds.y = Display.getHeight() - this.y;
		bounds.height = bounds.y - this.height;
		try{
			texture = TextureLoader.getTexture("PNG", ResourceLoader.getResourceAsStream(res));
		}catch(Exception e){}
	}
 
	public void input(){
		if((Mouse.getX() >= bounds.x && Mouse.getX() <= bounds.width) && (Mouse.getY() <= bounds.y && Mouse.getY() >= bounds.height) && Mouse.getEventButton() == 0 && !Mouse.getEventButtonState()){
			System.out.println("Action Button");
		}
	}
 
	private void update(){}
 
	public void render(){
		update();
 
		Color.white.bind();
		texture.bind();
 
		GL11.glBegin(GL11.GL_QUADS);
		GL11.glTexCoord2f(0.0f, 0.0f);
		GL11.glVertex2i(x, y);
		GL11.glTexCoord2f(1.0f, 0.0f);
		GL11.glVertex2i(x + width, y);
		GL11.glTexCoord2f(1.0f, 1.0f);
		GL11.glVertex2i(x + width, y + height);
		GL11.glTexCoord2f(0.0f, 1.0f);
		GL11.glVertex2f(x, y + height);
		GL11.glEnd();
	}
}

thanks for the help