[Java] Tastatureingabe

import java.io.*;
public class Beispiel {
	public static void main(String[] args) {
		int i = 0;
		System.out.print("Zahl eingeben: ");	
			BufferedReader in = new BufferedReader(new InputStreamReader(System.in));		
		try {
			i = Integer.parseInt(in.readLine());
		} catch (NumberFormatException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		System.out.print(i);
	}
}

java NameDerClassDatei

import java.io.*;

public class InputOutput {

  public static int readInt() {
    int res;
    BufferedReader in = new BufferedReader( 
            new InputStreamReader( System.in )
        );
    try {
      res = Integer.parseInt( in.readLine() );
    } catch( NumberFormatException e ) {
      System.out.println("*** Input not an integer");
      throw new RuntimeException();
    } catch( Exception e ) {
      System.out.println("*** Error in reading input");
      throw new RuntimeException();
    }
    return res;
  }
  
  public static String readString() {
    String res;
    BufferedReader in = new BufferedReader( 
            new InputStreamReader( System.in )
        );
    try {
      res = in.readLine();
    } catch( Exception e ) {
      System.out.println("*** Error in reading input");
      throw new RuntimeException();
    }
    return res;
  }

  public static char readChar() {
    String instr;
    BufferedReader in = new BufferedReader( 
            new InputStreamReader( System.in )
        );
    try {
      instr = in.readLine();
    } catch( Exception e ) {
      System.out.println("*** Error in reading input");
      throw new RuntimeException();
    }
    if( instr.length() == 1 ) {
      return instr.charAt(0);
    } else if( instr.length() > 1 ) {
      System.out.println("*** Error: input too long");
      System.out.println("***        rest of input discarded");
      return instr.charAt(0);
    } else { // instr.length() == 0
      System.out.println("*** Error: input empty");
      throw new RuntimeException();
    }
  }

  public static void print( char c ){
    System.out.print(c);
  }
  public static void println( char c ){
    System.out.println(c);
  }
  public static void print( int i ){
    System.out.print(i);
  }
  public static void println( int i ){
    System.out.println(i);
  }
  public static void print( String s ){
    System.out.print(s);
  }
  public static void println( String s ){
    System.out.println(s);
  }
}

import java.util.Scanner;

public class ScannerTest {

	public static void main(String[] args) {

		[COLOR="Green"]Scanner scan = new Scanner(System.in);[/COLOR]
		System.out.print("Bitte geben Sie etwas ein: ");
		String s = [COLOR="Green"]scan.next();[/COLOR]
		System.out.println("\nSie haben " + s + " eingeben");

	}
}