// Using generics to convert run-time exceptions into compile-time exceptions 
import java.util.*; 
class WithGenerics {
  public static void main( String[ ] args ) { 
    // Creating an ArrayList with String specified 
    ArrayList<String> al = new ArrayList<String>( ); 
    al.add( args[0] );
    al.add( args[1] ); 
    // Now compiler doesn't allow the following command.
    al.add( Integer.parseInt( args[2] ) ); 

    String s1 = (String) al.get( 0 ); 
    String s2 = (String) al.get( 1 ); 
    String s3 = (String) al.get( 2 ); 
  } 
}