学JAVA一个多月了。。。老师叫我们做个计算器，其实之前我都写过很多计算器了（不是用JAVA写的）本来感觉这计算器很简单，而现在JAVA简单计算器的功能代码基本上已完成，但是不知道怎么回事一按等号，小数点，运算符号，清零，退格按就出现异常。。。找了半天都没看见有什么错误。。。感觉JAVA怎么一天到晚都是异常。。。哪位大哥帮我看下。。程序是附件里。。。谢啦
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[此贴子已经被作者于2007-5-6 13:09:01编辑过]

怎么都没人帮下忙

你把异常信息帖出来

java.lang.NumberFormatException: For input string: "."
at java.lang.NumberFormatException.forInputString(NumberFormatException.
java:48)
at java.lang.Integer.parseInt(Integer.java:446)
at java.lang.Integer.parseInt(Integer.java:496)
at My_caculator.actionPerformed(My_caculator.java:100)
at java.awt.Button.processActionEvent(Button.java:388)
at java.awt.Button.processEvent(Button.java:356)
at java.awt.Component.dispatchEventImpl(Component.java:3931)
at java.awt.Component.dispatchEvent(Component.java:3779)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:234)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
java.lang.NumberFormatException: For input string: "*"
at java.lang.NumberFormatException.forInputString(NumberFormatException.
java:48)
at java.lang.Integer.parseInt(Integer.java:446)
at java.lang.Integer.parseInt(Integer.java:496)
at My_caculator.actionPerformed(My_caculator.java:100)
at java.awt.Button.processActionEvent(Button.java:388)
at java.awt.Button.processEvent(Button.java:356)
at java.awt.Component.dispatchEventImpl(Component.java:3931)
at java.awt.Component.dispatchEvent(Component.java:3779)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:234)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

这是按了小数点和乘号的效果

你按了小数点就不能用 Integer.parseInt
要用Double.parseDouble

我没有啊。。你看看我程序就知道了。。。。

程序里面什么都没有用。。。就出现 这个鸟问题。。。

嗯，呼唤达人

千里来看下啊