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yes i know what i have done, but im having problems with the memory button,,, i have problems with the language and i cant explain you well the problem, whatever... thanks for the reply!

eemm... can you help me with a tutorial

JButton btn_Mm = new JButton("M-");
btn_Mm.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
here i have 2 write what ???

}

i need help for the code of the memory buttons(M+, M-, Mr and Mc). someone help me pleasee