/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class time
{
int h,m,sec;
void getdata()throws IOException
{ /*Scanner in = new Scanner(System.in);`
h=in.nextInt();
m= in.nextInt();
s=in.nextInt();*/
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String s= br.readLine();
String str[] = s.split(" ");
h=Integer.parseInt(str[0]);
m=Integer.parseInt(str[1]);
sec=Integer.parseInt(str[2]);
}
int calc_time(time t1,time t2)
{ return ((t2.h - t1.h)*3600 + (t2.m - t1.m)*60 + (t2.sec - t1.sec));
}
public static void main (String[] args) throws java.lang.Exception
{
// your code goes here
time t = new time();
t.getdata();
time te = new time();
te.getdata();
time tt = new time();
int val = tt.calc_time(t,te);
if(val>=0&&val<=99) System.out.println("S");
else if(val>99&&val<=199) System.out.println("C");
else if(val>199 && val<=299) System.out.println("S");
else if(val>299 && val<=399) System.out.println("C");
}
}
尽管这个特定程序在我的电脑上运行良好,但我在 Ideone 上遇到了运行时错误。 它指示第二个对象的 split 函数和 getdata() 函数调用出现错误。
最佳答案
已到达 STDIN 流的末尾,这意味着运行以下命令后:
String s = br.readLine();
s
仍然为 null,这会导致以下行出现 NPE:
String str[] = s.split(" ");
要解决此问题,请检查 null 并执行一些合理的操作,并提供一些输入供 Ideone 使用。此外,您的 BufferedReader 每次执行时只应创建一次,如以下 ideone 草图所示:http://ideone.com/VtQrxk
相关javadoc:
public String readLine() throws IOException
Reads a line of text. A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a linefeed.
Returns:
A String containing the contents of the line, not including any line-termination characters, or null if the end of the stream has been reached
http://docs.oracle.com/javase/7/docs/api/java/io/BufferedReader.html#readLine()
关于java - Ideone Java 程序运行时错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20780972/