CareerCup

public class TestPalindrome
{

public static void main(String[] args)
{
String newString = "Murder for a jar of red rum.";
String otherString = newString.replaceAll( "\\W", "" );
System.out.println(otherString);

String otherString2 = reverse2(otherString);
System.out.println(otherString2);

System.out.println(otherString);

if(otherString.equalsIgnoreCase(otherString2))
System.out.println("Palindrome");
else
System.out.println("not Palindrome");

}

public static String reverse2(String str)
{
char[] a = str.toCharArray();
int middle = str.length()/2;
int length = str.length() - 1;

for(int i = 0; i <= middle; i++)
{
char temp = a[i];
//System.out.println("temp is:" + temp);
//System.out.println("a[i] is:" + a[i]);
//System.out.println("a[length-i] is:" + a[length-i]);


a[i] = a[length-i];
a[length-i] = temp;
}

return new String(a);
}
}

public class OutputWithoutLoop
{
public static void main(String[] args)
{
output(100);
}

public static void output(int number)
{
while(number > 0)
{
System.out.println(" number is :" + number);
number--;
}
}
}

very good example

unchecked exception: error and runtime exception and its subclass
checked exception: is those subclasses of Exception that must be handled by try catch block, including IOException,SQLException and so on.