Passing parameters in o objects from an array

Question

My problem is, I have an array for a log object, the parameters are made in the same class. But the problem is I don't know how to get the parameters called logX logY etc into an actual object.

This is to make the object appear on the screen, but if I can even get it to become an object fist, that would solve so many problems!

This is the Log class:

package Frogger;

import javax.swing.JFrame;

public class Logs extends JFrame
{
    private int X;
    private int Y;
    private int width;
    private int height;


Logs[] LogArray = new Logs[10];
{

LogArray[0].X = 0;
LogArray[0].Y = 0;  
LogArray[0].width = 50; 
LogArray[0].height = 50;
}
}

This is the main:

   package Frogger;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Random;


public class Frogger_Main extends JFrame implements ActionListener
{
    private Container cPane;
    private JMenuBar mb;
    private JMenu mSystem;
    private JMenuItem mIRules, mIExit;
    private JButton btnExit, btnStart,btnReset;
    private JLabel lblTitle;
    private JPanel pNorth, pSouth, pCentre, pEast;
    private JPanel imagePanel;

    public void actionPerformed(ActionEvent e) 
    {/*For the main public class*/}



    public Frogger_Main()//Constructor
    {
        cPane = getContentPane();

        imagePanel = new JPanel()
        {
            public void paint(Graphics g)//The background thing
            {
                try
                {
                    BufferedImage image  = ImageIO.read(new File("Background.jpg"));
                    g.drawImage(image, 1, 1, null);
                } 
                catch (IOException e)
                {
                    e.printStackTrace();
                }
            }
        };
        imagePanel.setPreferredSize(new Dimension(500,500));

        cPane.add(imagePanel); // End of the background thing 
    }


}

And this is the class that will run it:

package Frogger;

import javax.swing.JFrame;



public class Test_Frogger
{

    public static void main(String[] args) 
    {

        Frogger_Main f = new Frogger_Main();
        f.setTitle("Frogger");
        f.setSize(1280,980);
        f.setResizable(false);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }

}

i need to make the object, i have the parameters just dont know how to make that into an object — Fiachra Kelly
– Fiachra Kelly, Commented Apr 20, 2018 at 11:19

xxxvodnikxxx · Accepted Answer · 2018-04-20 13:14:23Z

As I mentioned in the comments, your Logs class is weird...

public class Logs extends JFrame {
 private int X;
 private int Y;
 private int width;
 private int height;

//strange and should not be there, but ok
 Logs[] LogArray = new Logs[10]; 

 //totally nonsense piece of code
  {
  LogArray[0].X = 0;
  LogArray[0].Y = 0;
  LogArray[0].width = 50;
  LogArray[0].height = 50;
 }
}

So, you can do something like

package Frogger;

import javax.swing.JFrame;

public class Logs extends JFrame {
 private int x; //convention camelCase, start with small
 private int y;
 private int width;
 private int height;

  Logs(){
  //some kind of default constructor
    this.x = 0;   //int default value is zero, so you dont need to do this in fact
    this.y = 0;
    this.width = 50;
    this.height = 50;
  }

  //parametrized constructor
  Logs(int x, int y, int width, int height){
  //save values to class fields/ object properties
    this.x = x;
    this.y = y;
    this.width = width;
    this.height = height;
  }


  //because class fields are private, this is called setter
  public void setX(int x){
    this.x =x;
  }

  //because fields are private, this is called getter  
  public int getX(){
    return this.x;
  }

}

Then you can create somewhere Log array

//create array of 10 logs, but each will be null
Logs[] logArray = new Logs[10];

//for each will be used non parametrized constructor- that "some kind of default"" 
for(int i = 0,i < logArray.length; i++){
  logArray[i] = new Logs(); 
}

For example method to obtain this array with given length

public Logs[] getLogs(int count){
  Logs[] logArray = new Logs[count];

  for(int i = 0,i < logArray.length; i++){
    logArray[i] = new Logs(); 
  }  
}

And notice, because there is a setter, then you can make eg.

logArray[0].setX(4); //for setting
logArray[0].getX(); //for read value, getting

Umer Farooq · Accepted Answer · 2018-04-20 12:05:06Z

0

Use contructor in Logs class

public class Logs extends JFrame {

    private int x,y,width,height;

    public Logs(int x, int y, int width, int height)
    {
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
    }


}

Then call array like

Logs[] LogsArray = new Logs[10];

LogsArray[0] = new Logs(1,2,3,4);
LogsArray[1] = new Logs(3,2,3,5);

answered Apr 20, 2018 at 12:05

Umer Farooq

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