I am trying to add the actionlisteners for an array of buttons by calling a method using for loop but it didn't work it showed me no outputs neither any errors just BUILD SUCCESSFUL with nothing appearing when I separated each element of the array it worked successfully here is the method when it was built successfully ( I created a class for frame and class for panel named it cal which contains the buttons array and made it public just to access it for now easily then made an object of the panel in the frame class )
public void actionsnums ()
{
cal.arr[0].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+1);
else
reader.setText(""+1);;
}
});
cal.arr[1].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+2);
else
reader.setText(""+2);;
}
});cal.arr[2].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+3);
else
reader.setText(""+3);;
}
});cal.arr[4].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+4);
else
reader.setText(""+4);;
}
});cal.arr[5].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+5);
else
reader.setText(""+5);;
}
});cal.arr[6].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+6);
else
reader.setText(""+6);;
}
});cal.arr[8].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+7);
else
reader.setText(""+7);
}
});cal.arr[9].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+8);
else
reader.setText(""+8);;
}
});cal.arr[10].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+9);
else
reader.setText(""+9);}
});
cal.arr[13].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+0);
else
reader.setText(""+0);
}
});
}
here when it didn't work
public void actionsnums ()
{
for (int i=0;i<3;i++)
{
int y=i++;
cal.arr[i].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+y);
else
reader.setText(""+y);;
}
});
}
for (int i=4;i<7;i++)
{
int y=i;
cal.arr[i].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+y);
else
reader.setText(""+y);;
}
});}
for (int i=8;i<11;i++)
{
int y=i--;
cal.arr[i].addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
if (reader.getText()!="0")
reader.setText(reader.getText()+y);
else
reader.setText(""+y);;
}
});
}
}
