Compares two lines are returns true if they are equal or both null.

    

import java.awt.geom.Line2D;

public class Main {

  /**
   * Compares two lines are returns <code>true</code> if they are equal or
   * both <code>null</code>.
   *
   * @param l1  the first line (<code>null</code> permitted).
   * @param l2  the second line (<code>null</code> permitted).
   *
   * @return A boolean.
   */
  public static boolean equal(final Line2D l1, final Line2D l2) {
      if (l1 == null) {
          return (l2 == null);
      }
      if (l2 == null) {
          return false;
      }
      if (!l1.getP1().equals(l2.getP1())) {
          return false;
      }
      if (!l1.getP2().equals(l2.getP2())) {
          return false;
      }
      return true;
  }

}

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Compares two lines are returns true if they are equal or both null. : Shape « 2D Graphics GUI « Java

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