28. System.arraycopy, used prior to JDK 1.6

• The syntax of the arraycopy method of the System class

  
      System.arraycopy(
          fromArray, intFromIndex, toArray, intToIndex, 
          intLength);
  
  

• Code that copies the values of an array

  
      double[] grades = {92.3, 88.0, 95.2, 90.5};
      double[] percentages = new double[grades.length];
      System.arraycopy(
          grades, 0, percentages, 0, grades.length);
      percentages[1] = 70.2;        // doesn't change grades[1]
      System.out.println("grades[1]=" + grades[1]);
                                    // prints 88.0