import java.awt.*;
import javax.swing.*;
import java.text.*;
import java.awt.event.*;
public class Carpet extends JApplet implements ActionListener
{
//Carpet
double length,width;
//double length,width;
double area;
//Money
double total;
double constant = 1.99;
DecimalFormat myFormat = new DecimalFormat("#0.00");
String numberInStringFormat;
//Essentials
JButton button;
JTextField [ ] Box = {
new JTextField(),
new JTextField()
};
JLabel [ ] Label = {
new JLabel("Length"),
new JLabel("Width"),
};
//Strings
String [ ] Get = {
"getLength",
"getWidth"
};
public void init()
{
setLayout(null);
//Button
button = new JButton("Math!");
button.setBounds(110,110,100,30);
button.addActionListener(this);
//Add
add(button);
myTexts();
myLabels();
}
public void myTexts()
{
//JText Sets
for (int x=0;x<Box.length;x++)
{
Box[x].setBounds(50+(x*120),70,100,30);
add(Box[x]);
}
//JText String
for(int x=0;x<Get.length;x++)
{
Get[x]=Box[x].getText();
}
//String to Double
length= Double.parseDouble(Get[0]);
width= Double.parseDouble(Get[1]);
//ActionListener
for (int x=0;x<Box.length;x++)
{
Box[x].addActionListener(this);
}
}
public void myLabels()
{
//JLabels
for (int x=0;x<Label.length;x++)
{
Label[x].setBounds(75+(x*120),45,100,30);
add(Label[x]);
}
}
public double getArea(double length, double width)
{
area = length*width;
return area;
}
public double getPrice(double area)
{
total = area*constant;
return total;
}
public void actionPerformed(ActionEvent ae)
{
}
public void paint(Graphics g)
{
super.paint(g);
g.drawString("Price : "+total,130,160);
}
}
There's no compiling error, but when i try to run my applet.
Start: applet not initialized
This appears because of the
//String to Double
length= Double.parseDouble(Get[0]);
width= Double.parseDouble(Get[1]);
Anybody got a solution?
Trying to make it so I can press a button and get the price out after putting my numbers in the JTextFields
答案 0 :(得分:0)
You are trying to parse the string "getLength" and "getWidth" You will need to create a method called getLength and getWidth.