How to enter data using buttons in a text field like " 1+3 " like calculator

[Nawaz]

there is code below i want to enter data in a textfield like 1+4 using buttons......calculator application plz help


import com.sun.lwuit.Button;
import com.sun.lwuit.Container;
import com.sun.lwuit.Display;
import com.sun.lwuit.Form;
import com.sun.lwuit.Label;
import com.sun.lwuit.TextField;
import com.sun.lwuit.events.ActionEvent;
import com.sun.lwuit.events.ActionListener;
import com.sun.lwuit.geom.Dimension;
import com.sun.lwuit.layouts.GridLayout;
import com.sun.lwuit.layouts.Layout;
import javax.microedition.midlet.MIDlet;

/**
* @author Nawaz Baig
*/
public class Midlet extends MIDlet implements ActionListener {

Button b1;
Button b2;
Button b3;
Button b4;
Button b5;
Button b6;
Button b7;
Button b8;
Button b9;

Button b10;

Button b11;

Button b12;

Button b13;

TextField my;
Layout l;
public void startApp() {
Display.init(this);
Form mainForm = new Form("Telculator");


my = new TextField("");

mainForm.setLayout(new GridLayout(3,3));
b1= new Button("0");
b2= new Button("1");
b3= new Button("2");
b4= new Button("3");
b5= new Button("4");
b6= new Button("5");
b7= new Button("6");
b8= new Button("7");
b9= new Button("8");
b10= new Button("9");
b11=new Button("+");
b12=new Button("=");
b13 = new Button("Clear");



b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
b5.addActionListener(this);
b6.addActionListener(this);
b7.addActionListener(this);
b8.addActionListener(this);
b9.addActionListener(this);
b10.addActionListener(this);
b11.addActionListener(this);
b12.addActionListener(this);
b13.addActionListener(this);

mainForm.addComponent(my);
mainForm.addComponent(b1);
mainForm.addComponent(b2);
mainForm.addComponent(b3);
mainForm.addComponent(b4);
mainForm.addComponent(b5);
mainForm.addComponent(b6);
mainForm.addComponent(b7);
mainForm.addComponent(b8);
mainForm.addComponent(b9);
mainForm.addComponent(b10);
mainForm.addComponent(b11);
mainForm.addComponent(b12);
mainForm.addComponent(b13);
mainForm.show();
}

public void pauseApp() {
}

public void destroyApp(boolean unconditional) {
}

public void actionPerformed(ActionEvent ae) {

if(ae.getSource()==b1)
{
my.setT9Text("0");
}
if(ae.getSource()==b2)
{
my.setText("1");

}
if(ae.getSource()==b3)
{
my.setText("2");

}
if(ae.getSource()==b4)
{
my.setText("3");
}
if(ae.getSource()==b5)
{
my.setText("4");
}

if(ae.getSource()==b6)
{
my.setText("5");
}

if(ae.getSource()==b7)
{
my.setText("6");
}

if(ae.getSource()==b8)
{
my.setText("7");


}


if(ae.getSource()==b9)
{
my.setText("8");

}

if(ae.getSource()==b10)
{
my.setText("9");

}


if(ae.getSource()==b11)
{
my.setText("+");
}

if(ae.getSource()==b12)
{
int i = my.getText().indexOf("+");
String before =my.getText().substring(0, i);
String after =my.getText().substring(i,+1);


my.setText(Integer.parseInt(before)+Integer.parseI nt(after)+"" );
}
if(ae.getSource()==b13)
{
my.clear();
}


}
}

[DarrylBurke]

Please go through BB Code List - Java Programming Forum and edit your post accordingly.

db

[Nawaz]

there is code below i want to enter data in a textfield like 1+4 using buttons......calculator application in lwuit plz help

import com.sun.lwuit.Button;
 import com.sun.lwuit.Container;
 import com.sun.lwuit.Display;
 import com.sun.lwuit.Form;
 import com.sun.lwuit.Label;
 import com.sun.lwuit.TextField;
 import com.sun.lwuit.events.ActionEvent;
 import com.sun.lwuit.events.ActionListener;
 import com.sun.lwuit.geom.Dimension;
 import com.sun.lwuit.layouts.GridLayout;
 import com.sun.lwuit.layouts.Layout;
 import javax.microedition.midlet.MIDlet;
 
/**
 * @author Nawaz Baig
 */
 public class Midlet extends MIDlet implements ActionListener {
 
Button b1;
 Button b2;
 Button b3;
 Button b4;
 Button b5;
 Button b6;
 Button b7;
 Button b8;
 Button b9;
 
Button b10;
 
Button b11;
 
Button b12;
 
Button b13;
 
TextField my;
 Layout l;
 public void startApp() {
 Display.init(this);
 Form mainForm = new Form("Telculator");
 

my = new TextField("");
 
mainForm.setLayout(new GridLayout(3,3));
 b1= new Button("0");
 b2= new Button("1");
 b3= new Button("2");
 b4= new Button("3");
 b5= new Button("4");
 b6= new Button("5");
 b7= new Button("6");
 b8= new Button("7");
 b9= new Button("8");
 b10= new Button("9");
 b11=new Button("+");
 b12=new Button("=");
 b13 = new Button("Clear");
 


b1.addActionListener(this);
 b2.addActionListener(this);
 b3.addActionListener(this);
 b4.addActionListener(this);
 b5.addActionListener(this);
 b6.addActionListener(this);
 b7.addActionListener(this);
 b8.addActionListener(this);
 b9.addActionListener(this);
 b10.addActionListener(this);
 b11.addActionListener(this);
 b12.addActionListener(this);
 b13.addActionListener(this);
 
mainForm.addComponent(my);
 mainForm.addComponent(b1);
 mainForm.addComponent(b2);
 mainForm.addComponent(b3);
 mainForm.addComponent(b4);
 mainForm.addComponent(b5);
 mainForm.addComponent(b6);
 mainForm.addComponent(b7);
 mainForm.addComponent(b8);
 mainForm.addComponent(b9);
 mainForm.addComponent(b10);
 mainForm.addComponent(b11);
 mainForm.addComponent(b12);
 mainForm.addComponent(b13);
 mainForm.show();
 }
 
public void pauseApp() {
 }
 
public void destroyApp(boolean unconditional) {
 }
 
public void actionPerformed(ActionEvent ae) {
 
if(ae.getSource()==b1)
 {
 my.setT9Text("0");
 }
 if(ae.getSource()==b2)
 {
 my.setText("1");
 
}
 if(ae.getSource()==b3)
 {
 my.setText("2");
 
}
 if(ae.getSource()==b4)
 {
 my.setText("3");
 }
 if(ae.getSource()==b5)
 {
 my.setText("4");
 }
 
if(ae.getSource()==b6)
 {
 my.setText("5");
 }
 
if(ae.getSource()==b7)
 {
 my.setText("6");
 }
 
if(ae.getSource()==b8)
 {
 my.setText("7");
 

}
 

if(ae.getSource()==b9)
 {
 my.setText("8");
 
}
 
if(ae.getSource()==b10)
 {
 my.setText("9");
 
}
 

if(ae.getSource()==b11)
 {
 my.setText("+");
 }
 
if(ae.getSource()==b12)
 {
 int i = my.getText().indexOf("+");
 String before =my.getText().substring(0, i);
 String after =my.getText().substring(i,+1);
 

my.setText(Integer.parseInt(before)+Integer.parseI nt(after)+"" );
 }
 if(ae.getSource()==b13)
 {
 my.clear();
 }
 

}
 }