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Foil 9 AWT Components -- Radio Buttons , CheckboxGroup

From Feb 3 Delivered Lecture for Course CPS616 -- Java Lecture 4 -- AWT Through I/O CPS616 spring 1997 -- Feb 3 1997. by Nancy McCracken * See also color IMAGE
Secs 113.7
Radiobuttons are identical to Checkbox's but grouped so that only one checkbox in a group can be on at a time. They use same class for buttons but add CheckboxGroup class
CheckboxGroup cbg = new CheckboxGroup();
cb1 = new Checkbox("Red", cbg, false));
cb2 = new Checkbox("Green", cbg, false));
cb3 = new Checkbox("Blue", cbg, true));
add(cb1); add(cb2); add(cb3);
In addition to checking the state of checkboxes in a group, the method getCurrent returns the one checkbox which is on:
  • cb = cbg.getCurrent();
Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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