Java image interface development simple example-Application of jradiobutton, jcheckbox, and jlabel

Java image interface development example

For jradiobutton, jcheckbox, and jlabel applications, you only need to modify the jcheckbox and jlabel applications and add single-choice buttons. A set of note single-choice buttons must be placed in the buttongroup to take effect. The Code is as follows:

Import java. AWT. borderlayout;
Import java. AWT. Font;
Import java. AWT. event. actionevent;
Import java. AWT. event. actionlistener;

Import javax. Swing. buttongroup;
Import javax. Swing. jcheckbox;
Import javax. Swing. jframe;
Import javax. Swing. jlabel;
Import javax. Swing. jpanel;
Import javax. Swing. jradiobutton;

/**
* Jradiobutton, jcheckbox, and jlabel Application Instances
*
* @ Author Zuo Jie jdk5.0
*/
Public class example10frame extends jframe {

/**
*
*/
Private Static final long serialversionuid = 1l;

Private jlabel label;

Private jcheckbox bold;

Private jcheckbox italic;

Private buttongroup group;

Private jpanel;

Private Static int fontsize = 14; // global font size

Private Static int modes = 0; // global font Model

Public example10frame (){
Settitle ("jradiobutton application"); // set the Form title
Setsize (500,300); // set the form size
// Create a jlabel component to display text information
Label = new jlabel ("this is a test text! ");
Label. setfont (new font ("", modes, fontsize); // set the text font size
Add (Label, borderlayout. center); // Add the jlabel component to the form.
// Create an event listening object
Actionlistener listener = new actionlistener (){
Public void actionreceivmed (actionevent event ){
Int mode = 0;
If (bold. isselected () // whether to bold
Mode + = font. Bold;
If (italic. isselected () // whether it is Italic
Mode + = font. italic;
Label. setfont (new font ("", mode, fontsize); // reset the text
Modes = mode;
}
};
// Create a check box and a single button for adding a panel
Panel = new jpanel ();
// Create the jcheckbox component
Bold = new jcheckbox ("bold ");
Italic = new jcheckbox ("italic ");
// Add a listener for the jcheckbox component
Bold. addactionlistener (listener );
Italic. addactionlistener (listener );
// Add the jcheckbox component to the Panel
Panel. Add (BOLD );
Panel. Add (italic );
// Create a buttongroup object. The single-choice button must be added to this group for practical purpose.
Group = new buttongroup ();
// Add a radio button
Addradiobutton ("small", 8 );
Addradiobutton ("default", fontsize );
Addradiobutton ("big", 20 );
// Add the panel to the form
Add (panel, borderlayout. South );
}

Public void addradiobutton (string name, final int size ){
Boolean selected = size = fontsize; // select whether the font is the same as the default font.
Jradiobutton button = new jradiobutton (name, selected); // create jradiobutton button
Group. Add (button); // Add the jradiobutton button to the button group
Panel. Add (button); // Add the button to the Panel
// Create a jradiobutton event listener
Actionlistener listener = new actionlistener (){
Public void actionreceivmed (actionevent event ){
// Set the font
Label. setfont (new font ("", modes, size ));
Fontsize = size;
}
};
// Add a listener for the jradiobutton button
Button. addactionlistener (listener );
}

Public static void main (string [] ARGs ){
Example10frame frame = new example10frame ();
Frame. setdefaclocloseoperation (jframe. exit_on_close );
Frame. setvisible (true );
}
}