java - Selecting radio buttons to make text appear -

using radio buttons displayed on panel, possible select radio button , display text on panel explaining user has selected?

so here list of radio buttons

    public void radiobuttons() {     btldap = new jradiobutton ("ldap");     btldap.setbounds(60,85,100,20);     panelholder.add(btldap);      btkerbegos = new jradiobutton ("kerbegos");     btkerbegos.setbounds(60,115,100,20);     panelholder.add(btkerbegos);      btspnego =new jradiobutton("spnego");     btspnego.setbounds(60,145,100,20);     panelholder.add(btspnego);      btsaml2 = new jradiobutton("saml2");     btsaml2.setbounds(60,175,100,20);     panelholder.add(btsaml2); } 

user selects btldap

btldap.setselected(true); 

now how make text appear on panel not message box

if want display text when radio button selected use actionlistener.

final jtextarea textarea = new jtextarea(); add(textarea);  jradiobutton radiobutton = new jradiobutton(); add(radiobutton); radiobutton.addactionlistener(new actionlistener() {     @override     public void actionperformed(actionevent e)     {         textarea.settext("selected");     } });  jradiobutton radiobutton2 = new jradiobutton(); add(radiobutton2); radiobutton2.addactionlistener(new actionlistener() {     @override     public void actionperformed(actionevent e)     {         textarea.settext("selected 2");     } });  radiobutton.setselected(true); 

when first selected change text of jtextarea the first selected!, same second radio button the second selected.

as said, radiobutton.setselected(true); setselected used select/deselect radio button.

in example used textarea, can use have method change text contains (an image too!)

official doc, here.

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anyway, actionperformed not called when setselected used go method

private void updatetext(int index) {     string text = null;      switch (index)     {         case 0:             text = "selected";             break;         case 1:             text = "selected 2";             break;     }      textarea.settext(text); } 

and call updatetext(0 or 1 etc.) when want select setselected radio button , update text too.

all useful, if want show "what happens if press it" message, if want change text of area text of radio button, use

textarea.settext(e.getactioncommand());