ActionListener on a JButton created from vector?

IntProjet. B refers to the last button created in your loop, so the result is expected. Instead, you can give each button its own instance of a listener, as shown here .

You are continually reassigning the value of be in that loop. When the loop completes, the last JButton to be created is assigned to it. You then bind an ActionListener to that button, but none of the others.

I'm not sure why you expected a single invocation of intProjet.b. AddActionListener() to add it to all JButtons.

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