?? addtwodouble.java
字號:
//import the nessary class
import java.awt.Graphics;
import javax.swing.JApplet;
import javax.swing.JOptionPane;
public class AddTwoDouble extends JApplet{
double sum;
public void init (){
String theNum1,theNum2;
theNum1 = JOptionPane.showInputDialog(null,"The First Number");
theNum2 = JOptionPane.showInputDialog(null,"The Second Nubmber");
double num1,num2;
num1 = Double.parseDouble(theNum1);
num2 = Double.parseDouble(theNum2);
sum = num1 + num2;
}
public void paint (Graphics g){
super.paint(g);
g.drawString("the sum is =" + sum, 25,25);
}
};
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