![The addButton_Click procedure should perform the following three tasks:
1.add the integer entered in the numTextBox to an accumulator
2. display the integer on a separate line in the ListTextBox
3. display the accumulator's value in the sumLabel.
How can I accomplish this using a TextBox instead of an InputBox(with prompts)?
Solution
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/*
*/
public class Cal extends Applet
implements ActionListener
{
String msg=" ";
int v1,v2,result;
TextField t1;
Button b[]=new Button[10];
Button add,sub,mul,div,clear,mod,EQ;
char OP;
public void init()
{
Color k=new Color(120,89,90);
setBackground(k);
t1=new TextField(10);
GridLayout gl=new GridLayout(4,5);
setLayout(gl);
for(int i=0;i<10;i++)
{
b[i]=new Button(""+i);](https://image.slidesharecdn.com/theaddbuttonclickprocedureshouldperformthefollowingthreetas-230704134046-4d0f1fa6/85/The-addButton_Click-procedure-should-perform-the-following-three-tas-pdf-1-320.jpg)
![}
add=new Button("add");
sub=new Button("sub");
mul=new Button("mul");
div=new Button("div");
mod=new Button("mod");
clear=new Button("clear");
EQ=new Button("EQ");
t1.addActionListener(this);
add(t1);
for(int i=0;i<10;i++)
{
add(b[i]);
}
add(add);
add(sub);
add(mul);
add(div);
add(mod);
add(clear);
add(EQ);
for(int i=0;i<10;i++)
{
b[i].addActionListener(this);
}
add.addActionListener(this);
sub.addActionListener(this);
mul.addActionListener(this);
div.addActionListener(this);
mod.addActionListener(this);
clear.addActionListener(this);
EQ.addActionListener(this);
}
public void actionPerformed(ActionEvent ae)
{](https://image.slidesharecdn.com/theaddbuttonclickprocedureshouldperformthefollowingthreetas-230704134046-4d0f1fa6/85/The-addButton_Click-procedure-should-perform-the-following-three-tas-pdf-2-320.jpg)
The addButton_Click procedure should perform the following three tas.pdf
- 1. The addButton_Click procedure should perform the following three tasks: 1.add the integer entered in the numTextBox to an accumulator 2. display the integer on a separate line in the ListTextBox 3. display the accumulator's value in the sumLabel. How can I accomplish this using a TextBox instead of an InputBox(with prompts)? Solution import java.awt.*; import java.awt.event.*; import java.applet.*; /* */ public class Cal extends Applet implements ActionListener { String msg=" "; int v1,v2,result; TextField t1; Button b[]=new Button[10]; Button add,sub,mul,div,clear,mod,EQ; char OP; public void init() { Color k=new Color(120,89,90); setBackground(k); t1=new TextField(10); GridLayout gl=new GridLayout(4,5); setLayout(gl); for(int i=0;i<10;i++) { b[i]=new Button(""+i);
- 2. } add=new Button("add"); sub=new Button("sub"); mul=new Button("mul"); div=new Button("div"); mod=new Button("mod"); clear=new Button("clear"); EQ=new Button("EQ"); t1.addActionListener(this); add(t1); for(int i=0;i<10;i++) { add(b[i]); } add(add); add(sub); add(mul); add(div); add(mod); add(clear); add(EQ); for(int i=0;i<10;i++) { b[i].addActionListener(this); } add.addActionListener(this); sub.addActionListener(this); mul.addActionListener(this); div.addActionListener(this); mod.addActionListener(this); clear.addActionListener(this); EQ.addActionListener(this); } public void actionPerformed(ActionEvent ae) {
- 3. String str=ae.getActionCommand(); char ch=str.charAt(0); if ( Character.isDigit(ch)) t1.setText(t1.getText()+str); else if(str.equals("add")) { v1=Integer.parseInt(t1.getText()); OP='+'; t1.setText(""); } else if(str.equals("sub")) { v1=Integer.parseInt(t1.getText()); OP='-'; t1.setText(""); } else if(str.equals("mul")) { v1=Integer.parseInt(t1.getText()); OP='*'; t1.setText(""); } else if(str.equals("div")) { v1=Integer.parseInt(t1.getText()); OP='/'; t1.setText(""); } else if(str.equals("mod")) { v1=Integer.parseInt(t1.getText()); OP='%'; t1.setText(""); } if(str.equals("EQ"))
- 4. { v2=Integer.parseInt(t1.getText()); if(OP=='+') result=v1+v2; else if(OP=='-') result=v1-v2; else if(OP=='*') result=v1*v2; else if(OP=='/') result=v1/v2; else if(OP=='%') result=v1%v2; t1.setText(""+result); } if(str.equals("clear")) { t1.setText(""); } } }