// create action when a user click
public ActionListener createaction (JButton butt)
{
ActionListener acLis = new ActionListener (){
@Override
public void actionPerformed(ActionEvent e)
{
//if the button is not an operattion (is number include '.')
if (!isOperator(butt))
{
if (isOprClick) // if an operation is clicked
{
n1=Float.valueOf(TF1.getText());
TF1.setText("");
}
if (!TF1.getText().contains(".")) // if the text dont contain "."
{
if(TF1.getText().equals(0)&& !butt.getText().equals("."))
{
//if the jtext contain only 0 clear the text
// and the button pressed is not '.'
TF1.setText(butt.getText());
isOprClick=false;
}
else
{
TF1.setText(TF1.getText()+butt.getText());
}
}
else if (!butt.getText().equals("."))
{
TF1.setText(TF1.getText()+butt.getText());
isOprClick=false;
}
}
else // if the button is an opr -+*/=
{
if(operclickcount==0) //if an operation is clicked for the first time
{
operclickcount++;
//convert the textfield to float and set in n1
n1=Float.valueOf(TF1.getText());
opr=butt.getText();
isOprClick=true;
}
else
{
if (!butt.getText().equals("=")) //if the operation is not "="
{
if(!isEqualsClick)
{
n2=Float.valueOf(TF1.getText());
TF1.setText(Float.toString(calc(opr, n1, n2)));
opr=butt.getText();
n2=Float.valueOf(TF1.getText());
isOprClick=true;
isEqualsClick=false;
}
else
{
isEqualsClick=false;
opr=butt.getText();
}
}
else
{
n2= Float.valueOf(TF1.getText());
TF1.setText(Float.toString(calc(opr, n1, n2)));
n1= Float.valueOf(TF1.getText());
isOprClick=true;
isEqualsClick=true;
}
}
}
} };return acLis ;
}