static int[] i=null;
public static void main(String[] args){
int j=0;
Scanner in = new Scanner(System.in);
while(in.hasNextInt()){
i[j]=in.nextInt();
j++;
}
in.close();
}
为什么在运行过程中出现Exception in thread "main" java.lang.NullPointerException
at Kalazi.main(Kalazi.java:8)
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Scanner循环问题
static int[] i=null; public static void main(String[] args){ int j=0; Scanner in = new Scanner(System.in); while(in.hasNextInt()){ i[j]=in.nextInt(); j++; } in.close(); } 为什么在运行过程中出现Exception in thread "main" java.lang.NullPointerException at Kalazi.