jasonwing27
发贴: 66
积分: 0
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于 2004-10-10 12:31
{ 请尽量用准确的文字描述作为标题 you should cut-and-paste from the command window, instead of using an image! }
总是提示出错,图见附件
//Add.java
import java.awt.* ; import java.applet.Applet ; import javax.swing.* ;
public class Add extends Applet { double sum = 0 ; public void init() { String FirstNumber ; String SecondNumber ; double N1 ; double N2 ; FirstNumber = JOptionpane.showinputDialog( "Enter First Number :" ) ; SecondNnmber = JOptionpane.showinputDialog( "Enter Second Number :" ) ; N1 = Double.parseDouble( FirstNumber ) ; N2 = Double.parseDouble( SecondNumber ) ; sum = N1 + N2 ; } public void paint( Graphics g ) { g.drawString( "The Sum Is :"+sum,25,25 ) ; g.drawRect( 15,10,270,20 ) ; } }
why edited on 2004-10-10 12:56
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