Very simple program error (help)

Question

Dear group,
Just wanted to get a number from sdtin and print it. The program shows a compiler error. Help.
import java.io.*;
class keys
     public static void main(String args[])
          int a,b;
          System.out.println("enter a number");
          try
               a = System.in.read(b);
               System.out.write(a);
          catch(IOException e){
`               System.out.print("Sorry. can't print.");
}

Answer 1

error:
symbol:cannot resolve sysbol
location: class java.io.ImputStream
          a = System.in.read(b);but the same function works in this program.
class keys{
  public static void main (String args[])
      byte name[] = new byte[100];
      int n_read = 0;
      System.out.println("What is your name?");
      try {
        n_read = System.in.read(name);
        System.out.print("Hello ");
        System.out.write(name,0,n_read);
      catch (IOException e) {
        System.out.print("Sorry.  can't catch your name.");
}