color properties

[mrchaos]

I want to set color properties of panel objects such as buttons. Easy enough...however I want to pass the color in as a variable...such as...

btnClose.setBackground(Color.VARIABLE);

but that doesn't work. How would I pass a variable to this method?

Steve

[Dillinger4]

All you would have to do is create a new instance of a Color object with the rgb values that you choose then pass that object to a method that taks a Color object as an arguement.

[Dillinger4]

Or you could pass the r, g, b values to the method and create the Color object within the method itself.

public void changeColor(int r,int g, int b){
  jb.setBackground(new Color(r,g,b)); 
}

[Dillinger4]

Here is an example that i was working on for a little while. All it does is change the r,g,b values of a JButton when clicked. If any of the r,g,b values is > 255 the background color of the JButton is reset to the orgional color.

import java.awt.*; 
import javax.swing.*; 
import java.awt.event.*;

class X{
 private JFrame jf; 
 private JButton jb; 
 private Container c; 
 private int r; 
 private int g; 
 private int b;
 
 public X(){
  jf = new JFrame();
  jb = new JButton("Button");  
  c = jf.getContentPane(); 
  c.add(jb, BorderLayout.SOUTH); 
  jf.setSize(300,200);
  jf.setVisible(true);    
 }

 public void changeColor(int r,int g, int b){
  if((r < 255) && (g < 255) && (g < 255)){
   jb.setBackground(new Color(r,g,b)); 
  }else{
     jb.setBackground(new Color(0,0,0)); 
     setValues(true);
  }
 }

 public void addButtonListener(){
  jb.addActionListener(new ActionListener(){
   public void actionPerformed(ActionEvent avt){
    changeColor(r,g,b);
    setValues(false); 
   }
 });
}

public void setValues(boolean reset){
  if(!reset){
    r += 14; 
    g += 7;
    b += 1;
  }else{
    r = 0; 
    g = 0;
    b = 0;
  }
 }

 public void addWindowMonitor(){
   jf.addWindowListener(new WindowAdapter(){
    public void windowClosing(WindowEvent evt){
     System.exit(0); 
  }
  }); 
 }
}

 public class E{
  public static void main(String[] args){ 
    X x = new X();
    x.addButtonListener();
    x.addWindowMonitor();
  }
 }