How to call a function when I click jPanel (Java)?

Question

I am working with the NetBeans IDE in Java.

I have a form with one JPanel. Each JPanel has a gridLayout 3x3, and in every place there is an image representing the number [0,1,2,3,4,5,6,7,8] (the created image uses a custom class, not just the image setup in the lab).

I want to be able to share two images on the panel when the user clicks on them (first click: no action, second click: switch two images installed in jPanel components).

I have already created the exchangeComponents function with test code (for example:

exchangeComponents (0,8,jPanel1)

it correctly arranges the images located at position 1 (1st row, 1st column) and at position 2 (3rd row, 3rd column).

The creted function is as follows:

public void exchangeComponents(int component1,int component2,JPanel jpanel){
    try{
   Component aux1 = jpanel.getComponent(component1);
   Point aux1Loc = aux1.getLocation();
   Component aux2 = jpanel.getComponent(component2);
   Point aux2Loc = aux2.getLocation();
   aux1.setLocation(aux2Loc);
   aux2.setLocation(aux1Loc);
   }
   catch (java.lang.ArrayIndexOutOfBoundsException ex){ /* error! bad input to the function*/
       System.exit(1);
   }
}

, , exchangeComponents(), jPanel1, ? , () ? , , ( IDE), ,

 private void button1ActionPerformed(java.awt.event.ActionEvent evt) {  
// some code..
}

.

.

Answer 1

JLabels - , :

img1.addMouseListener(this);
img2.addMouseListener(this);

.., , Jlabel MouseEvent.getSource();,

boolean hasclicked1=false;
JLabel click1label=null;

public void mouseClicked(MouseEvent me){
  if(!hasclicked1){ //clicked first pic
    hasclicked1 = true;
    click1label = (JLabel) me.getSource();
  } else { //clicked second pic
    hasclicked1 = false;
    exchangeComponents(click1label, (JLabel) me.getSource(), /*your jpanel here*/);
  }
  //now change exchangeComponents so it uses JLabels as parameters
public void exchangeComponents(JLabel component1, JLabel component2, JPanel jpanel){
  try{
    Component aux1 = component1;
    Point aux1Loc = aux1.getLocation();
    Component aux2 = component2;
    Point aux2Loc = aux2.getLocation();
    aux1.setLocation(aux2Loc);
    aux2.setLocation(aux1Loc);
  } catch (java.lang.ArrayIndexOutOfBoundsException ex) { /* error! bad input to the function*/
   System.exit(1);
  }
}

JLabels , JLabel , ...

EDIT: , , , exchangeComponents MouseListener. mouseClicked , . hasclicked1 click1label . -

public class ComponentExchanger implements MouseListener {
boolean hasclicked1=false;
JLabel click1label=null;
JPanel mainPanel;
public ComponentExchanger(){
   //create JFrame, JPanel, etc.
   JFrame f=new JFrame();
   //etc.
   mainPanel=new JPanel();
   f.add(mainPanel);
   //set layout of panel, etc.
   for(int i=0;i<9;i++){
      JLabel l=new JLabel(/*label image here*/);
      Point loc=new Point(/*coordinates here*/);
      l.setLocation(loc);
      mainPanel.add(l);
      /*more code*/
      f.setVisible(true);
   }
}

public static void main(String args[]){
   new ComponentExchanger();
}


public void mouseClicked(MouseEvent me){
  if(!hasclicked1){ //clicked first pic
    hasclicked1 = true;
    click1label = (JLabel) me.getSource();
  } else { //clicked second pic
    hasclicked1 = false;
    exchangeComponents(click1label, (JLabel) me.getSource(), mainPanel);
  }
  //now change exchangeComponents so it uses JLabels as parameters
public void exchangeComponents(JLabel component1, JLabel component2, JPanel jpanel){
  try{
    Component aux1 = component1;
    Point aux1Loc = aux1.getLocation();
    Component aux2 = component2;
    Point aux2Loc = aux2.getLocation();
    aux1.setLocation(aux2Loc);
    aux2.setLocation(aux1Loc);
  } catch (java.lang.ArrayIndexOutOfBoundsException ex) { /* error! bad input to the function*/
   System.exit(1);
  }
}

//Also, you will need to include the other mouselistener implemented methods, just 
//leave them empty
}

Answer 2

, , . , . actionListener, , , - . MouseListener . , , . , 1 . 2, 0.

clicks++; //every time the mouse is clicked; clicks starts out at 0
if(clicks == 2){
clicks = 0; //at the end of the listener method
}

, .

clickImage = imageArray[clicks];

, 2 . exchangeComponents imageArray [1], imageArray [2],.

ints - , .