Shulou(Shulou.com)06/02 Report--

What is the implementation of the JavaSwingJCheckBox check box? I believe many inexperienced people are at a loss about it. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

1. Overview

JCheckBox, check box.

Common construction methods of JCheckBox:

/ / No text, JCheckBox () / with text is not selected by default, JCheckBox (String text) / / with text is not selected by default, and specify whether to select JCheckBox (String text, boolean selected)

Common methods of JCheckBox:

/ / set the text of the check box, Font and font color void setText (String text) void setFont (Font font) void setForeground (Color fg) / * the following method defines whether the check box is selected in the javax.swing.AbstractButton base class * / / sets the check box status void setSelected (boolean b) / / determines whether the check box is selected boolean isSelected () / / sets whether the check box is available void setEnabled (boolean enable) / / sets the spacing between picture and text void setIconTextGap (int iconTextGap)

Common JCheckBox listeners:

/ / add a state change listener void addChangeListener (ChangeListener l)

two。 Code example

Package com.xiets.swing;import javax.swing.*;import javax.swing.event.ChangeEvent;import javax.swing.event.ChangeListener;public class Main {public static void main (String [] args) {

JFrame jf = new JFrame (Test window)

Jf.setSize (250,250)

Jf.setLocationRelativeTo (null)

Jf.setDefaultCloseOperation (WindowConstants.EXIT_ON_CLOSE)

JPanel panel = new JPanel (); / / create a check box

JCheckBox checkBox01 = new JCheckBox ("pineapple")

JCheckBox checkBox02 = new JCheckBox (banana)

JCheckBox checkBox03 = new JCheckBox ("Sydney")

JCheckBox checkBox04 = new JCheckBox ("litchi")

JCheckBox checkBox05 = new JCheckBox ("orange")

JCheckBox checkBox06 = new JCheckBox ("Apple")

/ / add listeners whose state of the first check box is changed (other checkboxes can add listeners in this way if they need to change their status) checkBox01.addChangeListener (new ChangeListener () {

@ Override public void stateChanged (ChangeEvent e) {

/ / get the event source (that is, the check box itself)

JCheckBox checkBox = (JCheckBox) e.getSource ()

System.out.println (checkBox.getText () + "whether to check:" + checkBox.isSelected ())

}

});

/ / set the first check box to be selected by default

CheckBox01.setSelected (true)

Panel.add (checkBox01)

Panel.add (checkBox02)

Panel.add (checkBox03)

Panel.add (checkBox04)

Panel.add (checkBox05)

Panel.add (checkBox06)

Jf.setContentPane (panel)

Jf.setVisible (true)

}

}

After reading the above, have you mastered the implementation of the JavaSwingJCheckBox check box? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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