Most obvious way to generate code to check if a number is even, duh.

IsEven.java

public class Main {
  public static void main(String[] args) {
    boolean last;
    last = false;
    System.out.println("private bool IsEven(int number) {");
    for (int i = 1; i <= Integer.MAX_VALUE; i++) {
      System.out.println("    %s if (number == %d) return %b;", int==1?"":"else", i, last);
      last = !last;
    }
    System.out.println("}");
  }
}

Run the script, pipe output to a file and you'll have an ideal even check function.