Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

button background

Posted on 2004-10-16
6
Medium Priority
?
195 Views
Last Modified: 2010-03-31
hi experts

I have a bunch of buttons. I need code to set the latest (clicked button)'s background color to yellow. when another is clicked .it is turned yellow and the rest go back to white

thanks
0
Comment
Question by:Samooramad
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
6 Comments
 

Expert Comment

by:KaiNikulainen
ID: 12329138
Hi Samooramad,

    You can keep a reference to the last pressed button in a variable. When any button is pressed, change the color of the button in the variable to white and after that set the clicked button's color to yellow and save a reference to that button into the variable.

Kaitsu
0
 
LVL 14

Accepted Solution

by:
sudhakar_koundinya earned 1000 total points
ID: 12329181
are u expecting like this??

package org.prithvi.test;

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

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */
import java.awt.event.*;

public class ButtonTest
    extends JFrame
    implements ActionListener {
  BorderLayout borderLayout1 = new BorderLayout();
  JButton button1 = new JButton("Hello");
  JButton button2 = new JButton("Hello1");
  JButton button3 = new JButton("Hello2");

  public ButtonTest() {
    try {
      jbInit();
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }

  void jbInit() throws Exception {
    this.getContentPane().setLayout(borderLayout1);
    JPanel panel1 = new JPanel();
    panel1.add(button1);
    JPanel panel2 = new JPanel();
    panel2.add(button2);
    JPanel panel3 = new JPanel();
    panel3.add(button3);
    this.getContentPane().add(panel1,borderLayout1.EAST);
    this.getContentPane().add(panel2,borderLayout1.CENTER);
    this.getContentPane().add(panel3,borderLayout1.WEST);
    button1.addActionListener(this);
    button2.addActionListener(this);
    button3.addActionListener(this);
  }

  public static void main(String[] args) {
    ButtonTest buttonTest = new ButtonTest();
    buttonTest.setSize(500,500);
    buttonTest.show();
  }

  /**
   * actionPerformed
   *
   * @param e ActionEvent
   */
  public void actionPerformed(ActionEvent e) {
    if (e.getSource() == button1) {
      button1.setBackground(Color.YELLOW);
      button2.setBackground(Color.BLACK);
      button3.setBackground(Color.BLACK);
    }
    else if (e.getSource() == button2) {
      button2.setBackground(Color.YELLOW);
      button1.setBackground(Color.BLACK);
      button3.setBackground(Color.BLACK);

    }
    else if (e.getSource() == button3) {
      button3.setBackground(Color.YELLOW);
      button2.setBackground(Color.BLACK);
      button1.setBackground(Color.BLACK);

    }

  }

}
0
 
LVL 14

Expert Comment

by:sudhakar_koundinya
ID: 12329210
this is with array of buttons

package org.prithvi.test;

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

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */
import java.awt.event.*;

public class ButtonTest
    extends JFrame
    implements ActionListener {
  FlowLayout borderLayout1 = new FlowLayout();
  JButton buttons[] = new JButton[10];

  public ButtonTest() {
    try {
      jbInit();
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }

  void jbInit() throws Exception {
    this.getContentPane().setLayout(borderLayout1);
    JPanel panel1 = new JPanel();
    panel1.setLayout(borderLayout1);

    for (int i = 0; i < 10; i++) {
      buttons[i] = new JButton("Hello" + i);
      buttons[i].addActionListener(this);
      panel1.add(buttons[i]);
    }

    this.getContentPane().add(panel1);

  }

  public static void main(String[] args) {
    ButtonTest buttonTest = new ButtonTest();
    buttonTest.setSize(500, 500);
    buttonTest.show();
  }

  /**
   * actionPerformed
   *
   * @param e ActionEvent
   */
  public void actionPerformed(ActionEvent e) {
    for (int i = 0; i < 10; i++) {
      if (e.getSource() == buttons[i]) {
        buttons[i].setBackground(Color.YELLOW);
      }
      else {
        buttons[i].setBackground(Color.WHITE);
      }
    }

  }

}
0
Build and deliver software with DevOps

A digital transformation requires faster time to market, shorter software development lifecycles, and the ability to adapt rapidly to changing customer demands. DevOps provides the solution.

 
LVL 14

Expert Comment

by:sudhakar_koundinya
ID: 12329245
This must be a bit efficient, maintains the last clicked in memory

package org.prithvi.test;

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

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */
import java.awt.event.*;

public class ButtonTest
    extends JFrame
    implements ActionListener {
  FlowLayout borderLayout1 = new FlowLayout();
  JButton buttons[] = new JButton[10];
  JButton oldbutton;

  public ButtonTest() {
    try {
      jbInit();
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }

  void jbInit() throws Exception {
    this.getContentPane().setLayout(borderLayout1);
    JPanel panel1 = new JPanel();
    panel1.setLayout(borderLayout1);

    for (int i = 0; i < 10; i++) {
      buttons[i] = new JButton("Hello" + i);
      buttons[i].addActionListener(this);
       buttons[i].setBackground(Color.WHITE);
      panel1.add(buttons[i]);
    }

    this.getContentPane().add(panel1);

  }

  public static void main(String[] args) {
    ButtonTest buttonTest = new ButtonTest();
    buttonTest.setSize(500, 500);
    buttonTest.show();
  }

  /**
   * actionPerformed
   *
   * @param e ActionEvent
   */
  public void actionPerformed(ActionEvent e) {
    for (int i = 0; i < 10; i++) {
      if (e.getSource() == buttons[i]) {
        if (oldbutton != null) {
          oldbutton.setBackground(Color.WHITE);
        }
        buttons[i].setBackground(Color.YELLOW);
        oldbutton = buttons[i];
        break;
      }

    }

  }

}
0
 

Author Comment

by:Samooramad
ID: 12329867
thanks
0
 
LVL 14

Expert Comment

by:sudhakar_koundinya
ID: 12329897
thanks for accepting
0

Featured Post

Build and deliver software with DevOps

A digital transformation requires faster time to market, shorter software development lifecycles, and the ability to adapt rapidly to changing customer demands. DevOps provides the solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
The viewer will learn how to implement Singleton Design Pattern in Java.
Suggested Courses

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question