<分区>
我给了 23(看起来像一个正确的字符串)作为输入，但仍然得到 NumberFormatException。请指出我哪里做错了。
PS 我试图解决 codechef 上的“厨师和字符串问题”
相关代码:
Scanner cin=new Scanner(System.in);
cin.useDelimiter("\n");
String data=cin.next();
System.out.println(data);
/*
* @param Q no. of chef's requests
*/
String tempStr=cin.next();
System.out.println(tempStr);;
int Q = Integer.parseInt(tempStr);
输出:
sdfgsdg
sdfgsdg
23
23
Exception in thread "main" java.lang.NumberFormatException: For input string: "23
"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at Chef.RegexTestHarness.main(RegexTestHarness.java:24)
完整程序:
package Chef;
//
//TODO codechef constraints
import java.util.Scanner;
import java.lang.*;
import java.io.*;
//TODO RETURN TYPE
class RegexTestHarness
{
public static void main(String args[])
{
Scanner cin=new Scanner(System.in);
cin.useDelimiter("\n");
String data=cin.next();
System.out.println(data);
/*
* @param Q no. of chef's requests
*/
String tempStr=cin.next();
System.out.println(tempStr);;
int Q = Integer.parseInt(tempStr);
for(int i=0; i<Q; i++)
{
/*
* @param s chef's request
*/
String s= cin.next();//request
//void getParam() (returning multiple parameters problem)
//{a b L R
//where a:start letter
//b: end lettert
//L: minStartIndex
//L<=S[i]<=E[i]<=R
//R is the maxEndIndex
//TODO transfer to main
char a=s.charAt(0);
char b=s.charAt(3);
int L=0, R=0;
/*
* @param indexOfR in the request string s, we separate R (which is maxEndIndex of chef's
* good string inside data string)
* . To do that, we first need the index of R itself in request string s
*/
int indexOfR= s.indexOf(" ", 5) +1;
System.out.println("indexOfR is:" + s.indexOf(" ", 5));
L= Integer.parseInt( s.substring(5, indexOfR - 2) );
//TODO check if R,L<10^6
R=Integer.parseInt( s.substring(indexOfR) );
//} ( end getparam() )
//-----------------------------------
//now we have a b L R
//String good="";
//TODO add other constraints (like L<si.....) here
if(a !=b)
{ int startInd=data.indexOf(a, L), endInd=data.lastIndexOf(b, R);
int output=0, temp;
while((startInd<endInd)&&(startInd != (-1) ) && ( endInd != (-1) ))
{
temp = endInd;
while((startInd<endInd))
{
//good= good+ s.substring(startInd, endInd);
output++;
endInd=data.lastIndexOf(b, endInd);
}
startInd=data.indexOf(a, startInd);
//TODO if i comment the line below, eclipse says tat the variable temp
//(declared at line 68) is not used. Whereas it is used at 68
//(and 83, the line below)
endInd=temp;
}
System.out.println(output);
}
}//end for
cin.close();
}
}