这实质上是一个小的代码,我正在写作练习,需要我使用StringTokenizer。我之前做过类似的程序,但现在当我将字符串存储在数组中并尝试打印它们时,它显示出空指针异常。任何帮助?为什么在我的程序中显示空错误; Stringtokenizer数组
import java.util.*;
public class board1
{
String key;
String m[];
//function to accept the sentence
void getsent()
{
Scanner in=new Scanner(System.in);
System.out.println("Enter a sentence terminated by'.' or '?'");
String take=in.nextLine();
StringTokenizer taken=new StringTokenizer(take);
int numtokens=taken.countTokens();
String m[]=new String[numtokens];
for(int i=0;i<m.length;i++)
{
m[i]=taken.nextToken();
}
for(int i=0;i<m.length;i++)
{
System.out.print(m[i]);
}
}
// function to display
void display()
{
System.out.println("The words seperately right now are:");
for(int i=0;i<m.length;i++)
{
System.out.print(m[i]+"\t");
System.out.println();
}
}
// main to get functions
public static void main(String args[])
{
board1 ob= new board1();
ob.getsent();
ob.display();
}
}
谢谢!这帮助了我很多,并将帮助我参加即将到来的决赛! – Sree