Evaluating Checkbox Boolean Value

Question

I'm sure this is a rediculously easy question, but I just can't find the answer to it anywhere. I have a JCheckbox that I need to evaluate the boolean value of, and then change the value with an if statement. The problem is I just can't find the syntax anywhere for evaluating the contents of a JCheckbox, let alone changing it. This will probably be really easy one, but I just can't seem to find anything helpful. Thanks!

Its inherited from AbstractButton. – jn1kk May 30 '12 at 17:46 — jn1kk, May 30 '12 at 17:46

score 31 · Accepted Answer · edited May 23 '17 at 12:14

31

This SO thread sort of answers your question. If your JCheckBox is named "Foo", you would check its value with

Foo.isSelected()

To set its value, you would use

Foo.setSelected(true)

edited May 23 '17 at 12:14

Community

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answered May 30 '12 at 17:38

dshapiro

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I don't have a Java compiler handy right now, so I can't say for sure, but I'm pretty sure that just doing Foo.setSelected(true) will update the checkbox to be checked on the form. – dshapiro May 30 '12 at 17:53
While it works initially in an if statement, any further changes made do not change the other box. – justanother1 May 30 '12 at 17:56
Never Mind, I foudn the method I was looking for. – justanother1 May 30 '12 at 17:58
What was it? Future generations might like to know. – dshapiro May 30 '12 at 18:00
It's the itemListen method. Found it in another question. – justanother1 May 30 '12 at 18:01

score 9 · Answer 2 · answered May 30 '12 at 17:38

9

Do you mean how to check if Checkbox is selected or not, if yes then use isSelected

boolean isSelected = jCheckBox.isSelected();

if(isSelected ){
   jCheckBox.setSelected(false);
} else {
   jCheckBox.setSelected(true);
}

answered May 30 '12 at 17:38

mprabhat

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add ItemListener to the JCheckBox, – mKorbel May 30 '12 at 17:57

score 2 · Answer 3 · answered May 30 '12 at 17:41

2

There is an awesome tutorial from Sun that you can read to complete your knowledge. If you want to know the current selection state of a JCheckbox, just use the method isSelected().

answered May 30 '12 at 17:41

rlinden

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Evaluating Checkbox Boolean Value

3 Answers3