import javax.swing.Joptionpane;public class Addition
{
public static void main(String args[])
{
String firstnumber,
secondnumber;
int number1,
number2,
sum;
firstnumber=
Joptionpane.showmessageDialog(null,"enter to firstnumber");
secondnumber=
Joptionpane.showmessageDialog(null,"enter to secondnumber");
number1=Integer.parseInt(firstnumber);
number2=Integer.parseInt(secondnumber);
sum=number1+number2;
Joptionpane.showmessageDialog(null,"The sum is"+sum,"Results");
System.exit (0);
}
}
{
public static void main(String args[])
{
String firstnumber,
secondnumber;
int number1,
number2,
sum;
firstnumber=
Joptionpane.showmessageDialog(null,"enter to firstnumber");
secondnumber=
Joptionpane.showmessageDialog(null,"enter to secondnumber");
number1=Integer.parseInt(firstnumber);
number2=Integer.parseInt(secondnumber);
sum=number1+number2;
Joptionpane.showmessageDialog(null,"The sum is"+sum,"Results");
System.exit (0);
}
}
楼主【jeasonsoft】截止到2008-07-29 16:23:36的历史汇总数据(不包括此帖):
发帖的总数量:1 发帖的总分数:0 每贴平均分数:0
回帖的总数量:5 得分贴总数量:2 回帖的得分率:40%
结贴的总数量:0 结贴的总分数:0
无满意结贴数:0 无满意结贴分:0
未结的帖子数:1 未结的总分数:0
结贴的百分比:0.00 % 结分的百分比:---------------------
无满意结贴率:---------------------无满意结分率:---------------------
如何结贴请参考这里:http://topic.csdn.net/u/20080501/09/ef7ba1b3-6466-49f6-9d92-36fe6d471dd1.html
{
public static void main(String args[])
{
String firstnumber,
secondnumber;
int number1,
number2,
sum;
firstnumber=
JOptionPane.showInputDialog(null,"enter to firstnumber");
secondnumber=
JOptionPane.showInputDialog(null,"enter to secondnumber");
number1=Integer.parseInt(firstnumber);
number2=Integer.parseInt(secondnumber);
sum=number1+number2;
JOptionPane.showInputDialog(null,"The sum is"+sum,sum);
System.exit (0);
}
}
这样就OK了,你仔细比较一下,做事情要认真啊~~~~
Addition.java:1: 找不到符号
符号: 类 Joptionpane
位置: 软件包 javax.swing
import javax.swing.Joptionpane;
^
Addition.java:13: 找不到符号
符号: 变量 Joptionpane
位置: 类 Addition
Joptionpane.showmessageDialog(null,"enter to firstnumber");
^
Addition.java:15: 找不到符号
符号: 变量 Joptionpane
位置: 类 Addition
Joptionpane.showmessageDialog(null,"enter to secondnumber");
^
Addition.java:20: 找不到符号
符号: 变量 Joptionpane
位置: 类 Addition
Joptionpane.showmessageDialog(null,"The sum is"+sum,"Results");
^
4 错误
还有你的一个方法的方法名字写错了 showmessageDialog,应该是showMessageDialog();
建议你看看java的命名规范
Joptionpane.showmessageDialog(null,"enter to firstnumber");
secondnumber=
Joptionpane.showmessageDialog(null,"enter to secondnumber");……
Joptionpane.showmessageDialog(null,"The sum is"+sum,"Results");
应为firstnumber = JOptionPane.showInputDialog(null,"enter to firstnumber");
secondnumber = JOptionPane.showInputDialog(null,"enter to secondnumber");……
JOptionPane.showMessageDialog(null,"The sum is"+sum, "Results", JOptionPane.CLOSED_OPTION);
就这个吧
firstnumber=
Joptionpane.showmessageDialog(null,"enter to firstnumber");
这如何转换一个返回值为void的如何转换为string类型呢!!哈哈
那下面的就更不用说了