/*
* Created on 2007-3-16
*
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
*/
import java.math.BigDecimal;/**
* @author hp
*
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
*/
import javax.swing.JOptionPane;
public class TriangleJudge { public static void main(String[] args) {
String first;
String second;
String third;
String result;
int n1;
int n2;
int n3;
first=JOptionPane.showInputDialog("请输入第1条边长:");
second=JOptionPane.showInputDialog("请输入第2条边长:");
third=JOptionPane.showInputDialog("请输入第3条边长:");
n1=Integer.parseInt(first);
n2=Integer.parseInt(second);
n3=Integer.parseInt(third);
result="";
if ((n1+n2>n3)&&(n1-n2<n3))
{result=result+"您输入的三条边长分别是:"+n1+","+n2+","+n3+";"+"\nit can form a triangle";
if((n1==n2)&&(n2==n3))
result=result+"\ndengbian";
else if((n1==n2)||(n2==n3)||(n1==n3))
result=result+"\ndengyao";
else result=result+"normal";}
else result=result+"您输入的三条边长分别是:"+n1+","+n2+","+n3+";"+"\nit cannot form a triangle";
JOptionPane.showMessageDialog(null,result,"TriangleJudge",JOptionPane.INFORMATION_MESSAGE);
System.exit(0);}
}//如何添加异常处理,确保输入的数据不为空,并且都是正数?
请教...
* Created on 2007-3-16
*
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
*/
import java.math.BigDecimal;/**
* @author hp
*
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
*/
import javax.swing.JOptionPane;
public class TriangleJudge { public static void main(String[] args) {
String first;
String second;
String third;
String result;
int n1;
int n2;
int n3;
first=JOptionPane.showInputDialog("请输入第1条边长:");
second=JOptionPane.showInputDialog("请输入第2条边长:");
third=JOptionPane.showInputDialog("请输入第3条边长:");
n1=Integer.parseInt(first);
n2=Integer.parseInt(second);
n3=Integer.parseInt(third);
result="";
if ((n1+n2>n3)&&(n1-n2<n3))
{result=result+"您输入的三条边长分别是:"+n1+","+n2+","+n3+";"+"\nit can form a triangle";
if((n1==n2)&&(n2==n3))
result=result+"\ndengbian";
else if((n1==n2)||(n2==n3)||(n1==n3))
result=result+"\ndengyao";
else result=result+"normal";}
else result=result+"您输入的三条边长分别是:"+n1+","+n2+","+n3+";"+"\nit cannot form a triangle";
JOptionPane.showMessageDialog(null,result,"TriangleJudge",JOptionPane.INFORMATION_MESSAGE);
System.exit(0);}
}//如何添加异常处理,确保输入的数据不为空,并且都是正数?
请教...
n1=Integer.parseInt(first);
改为:
try
{
n1=Integer.parseInt(first);
}
catch(NumberFormatException nfe)
{
//fuck,请输入整数
}
if(n1<0)
{
//fuck,请输入正整数
}
n1=Integer.parseInt(first);
n2=Integer.parseInt(second);
n3=Integer.parseInt(third);
}catch(NumberFormatException e){
System.out.println("输入含有非数字符号!!!!");
}if(n1<=0)
{
//为非正数
}
first=JOptionPane.showInputDialog("请输入第1条边长:");
if(first.matches("\\d+")){
break;
}
}
==============================================================================
高境界啊,信誉:3,还在辛苦的回答问题,强烈要求版主给加信誉