27. Copy an array with Arrays.copyOf, JDK 1.6+

• Code that copies the values of an array with JDK 1.6 or later:

  
      double[] grades = {92.3, 88.0, 95.2, 90.5};
      double[] percentages = Arrays.copyOf(
          grades, grades.length);
      percentages[1] = 70.2;        // doesn't change grades[1]
      System.out.println("grades[1]=" + grades[1]);
                                    // prints 88.0
  
  

• Code that copies part of one array into another array

  
      double[] grades = {92.3, 88.0, 95.2, 90.5};
      Arrays.sort(grades);
      double[] lowestGrades = Arrays.copyOfRange(grades, 0, 2);
      double[] highestGrades = Arrays.copyOfRange(
          grades, 2, 4);