相关疑难解决方法(0)

我是一名java初学者,请记住这一点.我必须创建一个读取数字的程序,然后显示那个感叹号"!".

这就是我所拥有的:

import java.util.Scanner;
import java.io.PrintStream;

class E_HerhaalKarakter1 {

 PrintStream out;

 E_HerhaalKarakter1 () {
  out = new PrintStream(System.out);
 }

 String printUitroeptekens (int aantal) {
  String output = "!"

  for (int i = 0; i <= aantal; i++) {
   output.concat("!");
  }
  return output;
 }

 void start () {
  Scanner in = new Scanner(System.in);

  out.printf("Hoeveel uitroeptekens wilt u weergeven?\n");

  if(in.hasNext()) {
   out.printf("baldbla");
   printUitroeptekens(in.nextInt());
   out.printf("%s",output);
  }
 }

 public static void main (String[] argv) {
  new E_HerhaalKarakter1().start();
 }
}

谢谢