Reference this forum posting:

http://forums.java.net/jive/thread.jspa?threadID=16058&tstart=0


If I compile and execute the following program FROM THE WINDOWS COMMAND LINE, I get different behavior under Java 6 than I did under Java 5. (With Java 6, I get a NullPointerException; with Java 5, I didn't.)

import java.util.Scanner;

public class TestScan {

    public static void main(String args[]) {
Scanner keyboard = new Scanner(System.in);

System.out.print("Number: ");
int i = keyboard.nextInt();
System.out.print("char: ");
char c = keyboard.findInLine(".").charAt(0);
    }
}
Teasing apart the submitted test case shows that java.util.Scanner.findInLine(".") is returning null where it returned a String in earlier releases:

import java.util.Scanner;

public class TestScan {

    public static void main(String args[]) {
Scanner keyboard = new Scanner(System.in);

System.out.print("Number: ");
int i = keyboard.nextInt();
System.out.print("char: ");
String s = keyboard.findInLine(".");
if (s != null) {
char c = s.charAt(0);
System.out.println("c is: " + c);
} else {
System.out.println("s is null.");
}
    }
}

% java -showversion TestScan
java version "1.6.0-ea"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-ea-b45)
Java HotSpot(TM) Client VM (build 1.6.0-ea-b45, mixed mode)

Number: 8
char: s is null.